Cassandro Vt Do Amarante | Universidade do Estado de Santa Catarina (original) (raw)
Papers by Cassandro Vt Do Amarante
Emirates Journal of Food and Agriculture
The objective of this research was to evaluate the influence of the addition of aqueous extracts ... more The objective of this research was to evaluate the influence of the addition of aqueous extracts of Feijoa leaf genotypes (Acca Selowiana) (Access 2316, Alcântara, Helena, Mattos and Nonante) on the lactic fermentation performed by Streptococcus thermophilus and Lactobacillus delbrueckii subsp. Bulgaricus, in MRS broth and milk. The total content of phenolic compounds (TPC), the antioxidant activity (AA) and the antimicrobial activity were determined. For the samples fermented in MRS broth, with and without the presence of extracts, the parameters analyzed were the kinetics of cell growth, TPC, AA, pH, and bacterial microscopy. For the samples fermented in whole milk, the parameters analyzed were pH, titratable acidity, moisture, ash, protein, total solids, and sensory profile. There was inhibition of the mixed culture’s growth in the dilution of 80% of the extracts (TPC 75.82 - 110.90 mg EAG g-1), the other experiments having been performed with TPC below 70 mg EAG g-1. The kinetic...
Journal of agricultural and food chemistry, Jan 17, 2017
The aim of this study was to characterize the changes in the contents of total (TPC) and individu... more The aim of this study was to characterize the changes in the contents of total (TPC) and individual (IPC) phenolic compounds and the total antioxidant activity (TAA) in the peel and pulp, and total anthocyanins (TAN) in the peel, during the development of the fruits of Brookfield® and Mishima apple trees. 'Brookfield®' apples were harvested from the 49th to 138th days after full bloom (DAFB) and 'Mishima' apples from the 45th to 172th DAFB. In the pulp, the IPC, TPC and TAA rapidly reduced at 75 and 79 DAFB for the 'Brookfield®' and 'Mishima' apples, respectively, and then remained constant until commercial maturity. In the peel of 'Brookfield®' apples there was a reduction in the TPC and TAA at 79 DAFB. The quercetin 3-galactoside, epicatechin and procyanidin B2 contents reduced up to 107 DAFB with a subsequent increase and the values at commercial. In the peel of 'Mishima' apples there was a reduction in the TPC, TAA, epicatechin and...
Revista De Ciencias Agroveterinarias, 2010
Revista Brasileira De Agroecologia, Nov 12, 2006
Ciência Rural, 2003
As relações entre fonte e dreno interferem sobre a ocorrência de podridões de colmo na cultura do... more As relações entre fonte e dreno interferem sobre a ocorrência de podridões de colmo na cultura do milho (Zea mays). O estudo foi conduzido em Lages, SC, para avaliar o efeito da desfolha, população de plantas e híbridos sobre as podridões do colmo do milho. O delineamento experimental foi de blocos ao acaso com parcelas sub-subdivididas e três repetições. Os híbridos P32R21 (superprecoce), Premium (precoce) e C333B (tardio) foram testados sem desfolha e com 50% de desfolha no estágio de espigamento nas populações de 25.000, 50.000, 75.000 e 100.000 plantas ha-1. Avaliaram-se a incidência e a severidade das podridões do colmo causadas por Colletotrichum graminicola, Diplodia maydis e Fusarium moniliforme. O híbrido P32R21 foi o mais afetado pelos fungos causadores de podridões. Nos híbridos P32R21 e Premium, as plantas desfolhadas foram mais severamente infectadas pelos patógenos do que as intactas. O aumento da população de plantas aumentou a intensidade (incidência ou severidade) d...
Revista Brasileira de Fruticultura, 2009
O objetivo deste trabalho foi avaliar os efeitos da cobertura de videira 'Cabernet Sauvignon&... more O objetivo deste trabalho foi avaliar os efeitos da cobertura de videira 'Cabernet Sauvignon' com lona plástica translúcida sobre a disponibilidade de luz e água, a concentração foliar de clorofila e a fotossíntese. As plantas com cinco anos de idade foram conduzidas em sistema 'Y' sobre porta-enxerto Paulsen 1103. O experimento seguiu o delineamento em blocos ao acaso, com dois tratamentos (plantas sem e com cobertura plástica) e quatro repetições de 15 plantas (unidade experimental). A cobertura plástica reduziu o suprimento às plantas de radiações ultravioleta (UV), azul, verde, vermelho, vermelho distante e total (300-750 nm), bem como a disponibilidade hídrica nas camadas superficiais do solo (0-30 cm). As plantas cobertas apresentaram maior taxa fotossintética máxima e condutância estomática em relação às plantas descobertas. Os pontos de compensação e de saturação de luz, a eficiência quântica aparente, a respiração no escuro, a concentração foliar de clorofil...
Pesquisa Agropecuária Brasileira, 2010
O objetivo deste trabalho foi avaliar a colonização de Cryptosporiopsis perennans na epiderme de ... more O objetivo deste trabalho foi avaliar a colonização de Cryptosporiopsis perennans na epiderme de maçãs e a eficiência da aplicação de água aquecida e radiação UV-C no controle desse patógeno. Em maçãs submetidas à inoculação de C. perennans, a colonização de lenticelas e das áreas adjacentes pelo patógeno foi avaliada por microscopia eletrônica de varredura. A sensibilidade dos conídios de C. perennans aos tratamentos foi avaliada em suspensão aquosa, às temperaturas de 28, 45, 50 e 55ºC, por 15 e 30 s, e às doses de radiação UV-C de 0,018, 0,037, 0,075, 0,150, 0,375, 0,750, 1,500 e 3,000 kJ m-2. Em maçãs submetidas à inoculação de C. perennans, foram avaliados os efeitos de 0,375, 0,750 e 1,500 kJ m-2 de radiação UV-C e da aspersão de água aquecida à 50ºC, por 15 e 30 s no controle do patógeno. O fungo produziu abundante micélio e conídios nas lenticelas e nas áreas adjacentes, na epiderme das maçãs. A água aquecida a 50ºC por 15 s e à dose de radiação de UV-C de 0,750 kJ m-2 reduz...
Scientia Horticulturae, 2011
... Permissions & Reprints. Yield and fruit quality of 'Gala' and &... more ... Permissions & Reprints. Yield and fruit quality of 'Gala' and 'Fuji' apple trees protected by white anti-hail net. ... Abstract. Covering apple orchards with nets protects them from hailstorms but this changes the amount and quality of the light supplied to the trees. ...
Postharvest Biology and Technology, 2011
Canonical discriminant analysis (CDA) was used to identify the best method to discriminate betwee... more Canonical discriminant analysis (CDA) was used to identify the best method to discriminate between maturity and ripening stages, assessed in terms of dry matter content, firmness, color (peel and flesh), total soluble solids content attributes, before and during 'Keitt' mango ripening at 20 • C. Dry matter content was determined by hot-air oven and microwave oven methods. Fruit firmness was determined nondestructively by hand squeezing, with a durometer, using acoustic resonance and low-mass elastic impact methods (AWETA), as well as destructively by the penetrometer. Peel and flesh color were expressed as L*, a*, b*, h 0 and C* values. Total soluble solids content was analyzed from filtered juice from whole fruit tissue and from unfiltered juice squeezed out by hand. Canonical discriminant analysis indicated that the durometer and the penetrometer were better methods to assess firmness than hand firmness, acoustic resonance or impact methods. The best color attributes to follow changes during early stage of 'Keitt' mango ripening were a* and b* values of the flesh, whereas b* value of the peel was considered better during later stages of ripening. Results of total soluble solids content in filtered juice from whole fruit tissue were less variable compared to unfiltered juice squeezed out by hand. Dry matter content was better assessed by drying the sample in a microwave oven than in a hot-air oven. A combined CDA including the best methods to assess each ripening attribute, as well as titratable acidity, showed that the best tools to assess changes in fruit during ripening were the penetrometer, followed by flesh a* value and total soluble solids content (from filtered juice from whole fruit).
Revista Brasileira de Fruticultura, 2011
O objetivo deste trabalho foi avaliar a eficiência de diferentes embalagens no ensacamento de maç... more O objetivo deste trabalho foi avaliar a eficiência de diferentes embalagens no ensacamento de maçãs para o controle de pragas e doenças, e sua influência na maturação e qualidade dos frutos, em pomar sob sistema orgânico. O experimento foi conduzido em pomar com plantas de dez anos de idade da cultivar Imperial Gala, sobre porta-enxerto 'Marubakaido', com filtro EM-9, localizado no município de São Joaquim-SC, nas safras 2007/2008 e 2008/2009. Os frutos foram ensacados, após o raleio, com embalagens plásticas transparentes microperfuradas ou de tecido não texturizado (TNT). Frutos não ensacados constituíram o tratamento-controle. Na colheita, os frutos foram avaliados quanto aos danos provocados por mosca-das-frutas (Anastrepha fraterculus), mariposa-oriental (Grapholita molesta), lagarta-enroladeira (Bonagota salubricola) e pulgão-lanígero (Eriosoma lanigerum), incidência das doenças sarna-da-macieira (Venturia inaequalis) e podridão-amarga (Colletotrichum gloeosporioides),...
International Journal of Food Science & Technology, 2009
Fruits of date palm (Phoenix dactylifera L.) are consumed throughout the world and are a vital co... more Fruits of date palm (Phoenix dactylifera L.) are consumed throughout the world and are a vital component of the diet in most Arabian countries. This study has been carried out to evaluate the total phenolic content and the antioxidant activity of four date palm fruit varieties grown in Tunisia. All measurements were made at the 'tamar' stage-the final stage of fruit ripeness. The date varieties were found to be rich in total phenolic ranging from 209.42 mg of equivalent gallic acid ⁄ 100 g fresh weight in Kentichi to 447.73 mg equivalent gallic acid ⁄ 100 g fresh weight in Allig. The date varieties studied were characterised by a high antioxidant activity ranging from 866.82 for the Deglet Nour to 1148.11 lmol Equivalent Trolox ⁄ 100 g fresh weight for Khouet Kenta by the ABTS method. In fact, the DPPH method revealed that Allig having the lowest antioxidant activity (0.72) followed by Deglet Nour (1.53), Kentichi (1.68) and Khouet Kenta variety (1.96). This study suggest that Tunisian date palm fruit may serve as a good source of natural antioxidants and could potentially be considered as a functional food ingredient.
Revista Brasileira de Fruticultura, 2017
The storage of ‘Rocha’ pears under controlled atmosphere (CA) preserves fruit quality for long pe... more The storage of ‘Rocha’ pears under controlled atmosphere (CA) preserves fruit quality for long periods. However, inadequate CA conditions might impair ripening and lead to flesh browning. This research was carried out to assess the effects of CA with ultra-low (ULO), and low O2 (LO) associated with different CO2 levels on ripening and occurrence of flesh browning in ‘Rocha’ pears. Treatments evaluated were: pO2 = 0.5 kPa (ULO) and pCO2 < 0.03 kPa; pO2 = 1.0 kPa (LO) and pCO2 < 0.03 kPa; pO2 = 1.0 kPa and pCO2 = 1.0 kPa; pO2 = 1.0 kPa and pCO2 = 2.0 kPa; and pO2 = 1.0 kPa and pCO2 = 3.0 kPa. A completely randomized experimental design was used, with four replicates. Fruits were harvested in Vacaria, RS, and stored under five CA conditions during 270 days (-0.5±0.1 ºC and relative humidity of 96±2%). Fruits were assessed after CA storage for respiratory rate, ethylene production, skin color, flesh firmness, texture, titratable acidity (TA), soluble solids content (SSC), sensory ...
Revista Brasileira de Fruticultura, 2021
The objective of this study was to assess the effects of post-bloom (PB) or preharvest (PH) treat... more The objective of this study was to assess the effects of post-bloom (PB) or preharvest (PH) treatments of ‘Braeburn’ apple trees with prohexadione-calcium (ProCa; 300 mg L-1), an inhibitor of gibberellins biosynthesis, or GA4+7 (300 mg L-1) on fruit quality at harvest and after storage (four months at 0±0.5 oC, followed by five days of shelf life). PB treatments started 15 days after full bloom, with one application every week and six applications in total. PH treatments started five weeks before anticipated harvest, with one application every week and four applications in total. Control trees were sprayed with water. GA4+7 PB increased length/diameter ratio, and GA4+7 PH increased titratable acidity (TA) and flesh firmness and slightly reduced red color of the fruit at harvest. ProCa PB and PH reduced ethylene production rate, delayed starch degradation and reduced soluble solids content of the fruit at harvest, and ProCa PH maintained firmness at harvest and after storage and TA o...
This study aimed to identify maturity indexes for the ideal harvest point of ‘SCS426 Venice’ appl... more This study aimed to identify maturity indexes for the ideal harvest point of ‘SCS426 Venice’ apples intended for immediate marketing or cold storage. The fruits were harvested weekly, in Fraiburgo, SC, between 144-172 days after full bloom (DAFB) and were evaluated one day after harvest and after storage for 240 days under air atmosphere (AA) at 0.5 °C and 265 days under controlled atmosphere (CA), at 0.7 °C. Maturity indexes for ‘SCS426 Venice’ apples intended for immediate marketing range from 15.3 to 16.5 lb for pulp firmness, 12.9 to 13.4% for soluble solids content (SSC), 0.291 to 0.338% for titratable acidity (TA), 8.2 to 9 for starch index (scale ranging from 1 to 9) and 3.7 to 4.3 for the skin background color (scale 1to 5). Maturity indexes for ‘SCS426 Venice’ apples intended for storage (AA and CA) range from 17.2 to 18.0 lb for pulp firmness, 11.8 to 12.5% for SSC, 0.350 to 0.356% for TA, 3.0 to 5.5 for starch index and 2.1 to 3.1 for the skin background color.
The objective of this study was to evaluate the effect of modified atmosphere (MA) and 1-methylcy... more The objective of this study was to evaluate the effect of modified atmosphere (MA) and 1-methylcyclopropene (1-MCP) treatment on low storage temperature (1.5 °C) and 1-MCP treatment on high storage temperature (8.0 °C) on fruit quality of ‘Laetitia’ plums, mainly on internal browning. The treatments evaluated were 1.5 °C; 1-MCP (1.0 µL L-1) + 1.5 °C; MA + 1.5 °C; 1-MCP + MA + 1.5 °C; 8.0 °C; 1-MCP + 8.0 °C. Fruit were stored for 30 and 40 days, followed by three day of shelf life. For fruit stored at 1.5 °C, the treatment with 1-MCP associated to MA provided higher flesh firmness, less intense skin red color and reduced occurrence of internal browning in comparison to the fruit stored at 1.5 °C of the remaining treatments, for both periods of storage. In fruit not treated with 1-MCP and stored at 8.0 °C there was no occurrence of internal browning, despite of lower flesh firmness and more intense red color of the skin and flesh in comparison to the fruit stored at 1.5 °C. The treatm...
This study was carried out to determine fruit maturation indexes for apple cv. SCS425 Luiza for o... more This study was carried out to determine fruit maturation indexes for apple cv. SCS425 Luiza for optimum harvest period (OHP). Fruits were harvested weekly from 121 to 153 days after full bloom (DAFB) and assessed one day after harvest, and after seven months of CA storage. Considering fruit appearance, OHP for immediate consumption was between 138 and 153 DAFB. The substantial increase of ethylene production in fruit after 127 DAFB indicated they should be harvested until this date if intended to long-term storage. However, to achieve at least 50% of the fruit with red color skin corresponding to Category 1, the OHP should be from 127 DAFB. The OHP should not exceed 138 DAPF to minimize the incidence of pulp darkening and rot during storage. Maximum sensory quality of apples after storage occurred when harvested between 121 and 131 DAFB. Considering that the OHP for ‘SCS425 Luiza’ apples intended for seven months in CA storage is between 121 and 131 DAFB, the maturation indexes of t...
Revista Brasileira de Fruticultura, 2020
This work was carried out to evaluate the effect of fruit ripening stage at harvest (“1/3 ripe” a... more This work was carried out to evaluate the effect of fruit ripening stage at harvest (“1/3 ripe” and “3/4 ripe”, respectively with 30% and 75% of red color) and passive modified atmosphere (MA) and active MA (with initial initial low O2 and/or high CO2) on quality of ‘San Andreas’ strawberries, with emphasis on bioactive compounds and metabolites of fermentative metabolism. The treatments evaluated were: control; passive MA [low density polyethylene (LDPE) packaging of 40 µm]; active MA with initial low O2 (1 kPa); active MA with initial high CO2 (30 kPa); and active MA with initial low O2 (1 kPa) and high CO2 (30 kPa). After 14 days of storage (0.5±0.2°C/92±2% RH) followed by two days of shelf life (20±5°C/65±10% RH), fruit weight loss was higher in control fruit. Soluble solids content and titratable acidity were not different between treatments. Fruit harvested “1/3 ripe” were firmer and had less intense red color after storage than fruit harvested “3/4 ripe”. Storage conditions d...
Emirates Journal of Food and Agriculture
The objective of this research was to evaluate the influence of the addition of aqueous extracts ... more The objective of this research was to evaluate the influence of the addition of aqueous extracts of Feijoa leaf genotypes (Acca Selowiana) (Access 2316, Alcântara, Helena, Mattos and Nonante) on the lactic fermentation performed by Streptococcus thermophilus and Lactobacillus delbrueckii subsp. Bulgaricus, in MRS broth and milk. The total content of phenolic compounds (TPC), the antioxidant activity (AA) and the antimicrobial activity were determined. For the samples fermented in MRS broth, with and without the presence of extracts, the parameters analyzed were the kinetics of cell growth, TPC, AA, pH, and bacterial microscopy. For the samples fermented in whole milk, the parameters analyzed were pH, titratable acidity, moisture, ash, protein, total solids, and sensory profile. There was inhibition of the mixed culture’s growth in the dilution of 80% of the extracts (TPC 75.82 - 110.90 mg EAG g-1), the other experiments having been performed with TPC below 70 mg EAG g-1. The kinetic...
Journal of agricultural and food chemistry, Jan 17, 2017
The aim of this study was to characterize the changes in the contents of total (TPC) and individu... more The aim of this study was to characterize the changes in the contents of total (TPC) and individual (IPC) phenolic compounds and the total antioxidant activity (TAA) in the peel and pulp, and total anthocyanins (TAN) in the peel, during the development of the fruits of Brookfield® and Mishima apple trees. 'Brookfield®' apples were harvested from the 49th to 138th days after full bloom (DAFB) and 'Mishima' apples from the 45th to 172th DAFB. In the pulp, the IPC, TPC and TAA rapidly reduced at 75 and 79 DAFB for the 'Brookfield®' and 'Mishima' apples, respectively, and then remained constant until commercial maturity. In the peel of 'Brookfield®' apples there was a reduction in the TPC and TAA at 79 DAFB. The quercetin 3-galactoside, epicatechin and procyanidin B2 contents reduced up to 107 DAFB with a subsequent increase and the values at commercial. In the peel of 'Mishima' apples there was a reduction in the TPC, TAA, epicatechin and...
Revista De Ciencias Agroveterinarias, 2010
Revista Brasileira De Agroecologia, Nov 12, 2006
Ciência Rural, 2003
As relações entre fonte e dreno interferem sobre a ocorrência de podridões de colmo na cultura do... more As relações entre fonte e dreno interferem sobre a ocorrência de podridões de colmo na cultura do milho (Zea mays). O estudo foi conduzido em Lages, SC, para avaliar o efeito da desfolha, população de plantas e híbridos sobre as podridões do colmo do milho. O delineamento experimental foi de blocos ao acaso com parcelas sub-subdivididas e três repetições. Os híbridos P32R21 (superprecoce), Premium (precoce) e C333B (tardio) foram testados sem desfolha e com 50% de desfolha no estágio de espigamento nas populações de 25.000, 50.000, 75.000 e 100.000 plantas ha-1. Avaliaram-se a incidência e a severidade das podridões do colmo causadas por Colletotrichum graminicola, Diplodia maydis e Fusarium moniliforme. O híbrido P32R21 foi o mais afetado pelos fungos causadores de podridões. Nos híbridos P32R21 e Premium, as plantas desfolhadas foram mais severamente infectadas pelos patógenos do que as intactas. O aumento da população de plantas aumentou a intensidade (incidência ou severidade) d...
Revista Brasileira de Fruticultura, 2009
O objetivo deste trabalho foi avaliar os efeitos da cobertura de videira 'Cabernet Sauvignon&... more O objetivo deste trabalho foi avaliar os efeitos da cobertura de videira 'Cabernet Sauvignon' com lona plástica translúcida sobre a disponibilidade de luz e água, a concentração foliar de clorofila e a fotossíntese. As plantas com cinco anos de idade foram conduzidas em sistema 'Y' sobre porta-enxerto Paulsen 1103. O experimento seguiu o delineamento em blocos ao acaso, com dois tratamentos (plantas sem e com cobertura plástica) e quatro repetições de 15 plantas (unidade experimental). A cobertura plástica reduziu o suprimento às plantas de radiações ultravioleta (UV), azul, verde, vermelho, vermelho distante e total (300-750 nm), bem como a disponibilidade hídrica nas camadas superficiais do solo (0-30 cm). As plantas cobertas apresentaram maior taxa fotossintética máxima e condutância estomática em relação às plantas descobertas. Os pontos de compensação e de saturação de luz, a eficiência quântica aparente, a respiração no escuro, a concentração foliar de clorofil...
Pesquisa Agropecuária Brasileira, 2010
O objetivo deste trabalho foi avaliar a colonização de Cryptosporiopsis perennans na epiderme de ... more O objetivo deste trabalho foi avaliar a colonização de Cryptosporiopsis perennans na epiderme de maçãs e a eficiência da aplicação de água aquecida e radiação UV-C no controle desse patógeno. Em maçãs submetidas à inoculação de C. perennans, a colonização de lenticelas e das áreas adjacentes pelo patógeno foi avaliada por microscopia eletrônica de varredura. A sensibilidade dos conídios de C. perennans aos tratamentos foi avaliada em suspensão aquosa, às temperaturas de 28, 45, 50 e 55ºC, por 15 e 30 s, e às doses de radiação UV-C de 0,018, 0,037, 0,075, 0,150, 0,375, 0,750, 1,500 e 3,000 kJ m-2. Em maçãs submetidas à inoculação de C. perennans, foram avaliados os efeitos de 0,375, 0,750 e 1,500 kJ m-2 de radiação UV-C e da aspersão de água aquecida à 50ºC, por 15 e 30 s no controle do patógeno. O fungo produziu abundante micélio e conídios nas lenticelas e nas áreas adjacentes, na epiderme das maçãs. A água aquecida a 50ºC por 15 s e à dose de radiação de UV-C de 0,750 kJ m-2 reduz...
Scientia Horticulturae, 2011
... Permissions & Reprints. Yield and fruit quality of 'Gala' and &... more ... Permissions & Reprints. Yield and fruit quality of 'Gala' and 'Fuji' apple trees protected by white anti-hail net. ... Abstract. Covering apple orchards with nets protects them from hailstorms but this changes the amount and quality of the light supplied to the trees. ...
Postharvest Biology and Technology, 2011
Canonical discriminant analysis (CDA) was used to identify the best method to discriminate betwee... more Canonical discriminant analysis (CDA) was used to identify the best method to discriminate between maturity and ripening stages, assessed in terms of dry matter content, firmness, color (peel and flesh), total soluble solids content attributes, before and during 'Keitt' mango ripening at 20 • C. Dry matter content was determined by hot-air oven and microwave oven methods. Fruit firmness was determined nondestructively by hand squeezing, with a durometer, using acoustic resonance and low-mass elastic impact methods (AWETA), as well as destructively by the penetrometer. Peel and flesh color were expressed as L*, a*, b*, h 0 and C* values. Total soluble solids content was analyzed from filtered juice from whole fruit tissue and from unfiltered juice squeezed out by hand. Canonical discriminant analysis indicated that the durometer and the penetrometer were better methods to assess firmness than hand firmness, acoustic resonance or impact methods. The best color attributes to follow changes during early stage of 'Keitt' mango ripening were a* and b* values of the flesh, whereas b* value of the peel was considered better during later stages of ripening. Results of total soluble solids content in filtered juice from whole fruit tissue were less variable compared to unfiltered juice squeezed out by hand. Dry matter content was better assessed by drying the sample in a microwave oven than in a hot-air oven. A combined CDA including the best methods to assess each ripening attribute, as well as titratable acidity, showed that the best tools to assess changes in fruit during ripening were the penetrometer, followed by flesh a* value and total soluble solids content (from filtered juice from whole fruit).
Revista Brasileira de Fruticultura, 2011
O objetivo deste trabalho foi avaliar a eficiência de diferentes embalagens no ensacamento de maç... more O objetivo deste trabalho foi avaliar a eficiência de diferentes embalagens no ensacamento de maçãs para o controle de pragas e doenças, e sua influência na maturação e qualidade dos frutos, em pomar sob sistema orgânico. O experimento foi conduzido em pomar com plantas de dez anos de idade da cultivar Imperial Gala, sobre porta-enxerto 'Marubakaido', com filtro EM-9, localizado no município de São Joaquim-SC, nas safras 2007/2008 e 2008/2009. Os frutos foram ensacados, após o raleio, com embalagens plásticas transparentes microperfuradas ou de tecido não texturizado (TNT). Frutos não ensacados constituíram o tratamento-controle. Na colheita, os frutos foram avaliados quanto aos danos provocados por mosca-das-frutas (Anastrepha fraterculus), mariposa-oriental (Grapholita molesta), lagarta-enroladeira (Bonagota salubricola) e pulgão-lanígero (Eriosoma lanigerum), incidência das doenças sarna-da-macieira (Venturia inaequalis) e podridão-amarga (Colletotrichum gloeosporioides),...
International Journal of Food Science & Technology, 2009
Fruits of date palm (Phoenix dactylifera L.) are consumed throughout the world and are a vital co... more Fruits of date palm (Phoenix dactylifera L.) are consumed throughout the world and are a vital component of the diet in most Arabian countries. This study has been carried out to evaluate the total phenolic content and the antioxidant activity of four date palm fruit varieties grown in Tunisia. All measurements were made at the 'tamar' stage-the final stage of fruit ripeness. The date varieties were found to be rich in total phenolic ranging from 209.42 mg of equivalent gallic acid ⁄ 100 g fresh weight in Kentichi to 447.73 mg equivalent gallic acid ⁄ 100 g fresh weight in Allig. The date varieties studied were characterised by a high antioxidant activity ranging from 866.82 for the Deglet Nour to 1148.11 lmol Equivalent Trolox ⁄ 100 g fresh weight for Khouet Kenta by the ABTS method. In fact, the DPPH method revealed that Allig having the lowest antioxidant activity (0.72) followed by Deglet Nour (1.53), Kentichi (1.68) and Khouet Kenta variety (1.96). This study suggest that Tunisian date palm fruit may serve as a good source of natural antioxidants and could potentially be considered as a functional food ingredient.
Revista Brasileira de Fruticultura, 2017
The storage of ‘Rocha’ pears under controlled atmosphere (CA) preserves fruit quality for long pe... more The storage of ‘Rocha’ pears under controlled atmosphere (CA) preserves fruit quality for long periods. However, inadequate CA conditions might impair ripening and lead to flesh browning. This research was carried out to assess the effects of CA with ultra-low (ULO), and low O2 (LO) associated with different CO2 levels on ripening and occurrence of flesh browning in ‘Rocha’ pears. Treatments evaluated were: pO2 = 0.5 kPa (ULO) and pCO2 < 0.03 kPa; pO2 = 1.0 kPa (LO) and pCO2 < 0.03 kPa; pO2 = 1.0 kPa and pCO2 = 1.0 kPa; pO2 = 1.0 kPa and pCO2 = 2.0 kPa; and pO2 = 1.0 kPa and pCO2 = 3.0 kPa. A completely randomized experimental design was used, with four replicates. Fruits were harvested in Vacaria, RS, and stored under five CA conditions during 270 days (-0.5±0.1 ºC and relative humidity of 96±2%). Fruits were assessed after CA storage for respiratory rate, ethylene production, skin color, flesh firmness, texture, titratable acidity (TA), soluble solids content (SSC), sensory ...
Revista Brasileira de Fruticultura, 2021
The objective of this study was to assess the effects of post-bloom (PB) or preharvest (PH) treat... more The objective of this study was to assess the effects of post-bloom (PB) or preharvest (PH) treatments of ‘Braeburn’ apple trees with prohexadione-calcium (ProCa; 300 mg L-1), an inhibitor of gibberellins biosynthesis, or GA4+7 (300 mg L-1) on fruit quality at harvest and after storage (four months at 0±0.5 oC, followed by five days of shelf life). PB treatments started 15 days after full bloom, with one application every week and six applications in total. PH treatments started five weeks before anticipated harvest, with one application every week and four applications in total. Control trees were sprayed with water. GA4+7 PB increased length/diameter ratio, and GA4+7 PH increased titratable acidity (TA) and flesh firmness and slightly reduced red color of the fruit at harvest. ProCa PB and PH reduced ethylene production rate, delayed starch degradation and reduced soluble solids content of the fruit at harvest, and ProCa PH maintained firmness at harvest and after storage and TA o...
This study aimed to identify maturity indexes for the ideal harvest point of ‘SCS426 Venice’ appl... more This study aimed to identify maturity indexes for the ideal harvest point of ‘SCS426 Venice’ apples intended for immediate marketing or cold storage. The fruits were harvested weekly, in Fraiburgo, SC, between 144-172 days after full bloom (DAFB) and were evaluated one day after harvest and after storage for 240 days under air atmosphere (AA) at 0.5 °C and 265 days under controlled atmosphere (CA), at 0.7 °C. Maturity indexes for ‘SCS426 Venice’ apples intended for immediate marketing range from 15.3 to 16.5 lb for pulp firmness, 12.9 to 13.4% for soluble solids content (SSC), 0.291 to 0.338% for titratable acidity (TA), 8.2 to 9 for starch index (scale ranging from 1 to 9) and 3.7 to 4.3 for the skin background color (scale 1to 5). Maturity indexes for ‘SCS426 Venice’ apples intended for storage (AA and CA) range from 17.2 to 18.0 lb for pulp firmness, 11.8 to 12.5% for SSC, 0.350 to 0.356% for TA, 3.0 to 5.5 for starch index and 2.1 to 3.1 for the skin background color.
The objective of this study was to evaluate the effect of modified atmosphere (MA) and 1-methylcy... more The objective of this study was to evaluate the effect of modified atmosphere (MA) and 1-methylcyclopropene (1-MCP) treatment on low storage temperature (1.5 °C) and 1-MCP treatment on high storage temperature (8.0 °C) on fruit quality of ‘Laetitia’ plums, mainly on internal browning. The treatments evaluated were 1.5 °C; 1-MCP (1.0 µL L-1) + 1.5 °C; MA + 1.5 °C; 1-MCP + MA + 1.5 °C; 8.0 °C; 1-MCP + 8.0 °C. Fruit were stored for 30 and 40 days, followed by three day of shelf life. For fruit stored at 1.5 °C, the treatment with 1-MCP associated to MA provided higher flesh firmness, less intense skin red color and reduced occurrence of internal browning in comparison to the fruit stored at 1.5 °C of the remaining treatments, for both periods of storage. In fruit not treated with 1-MCP and stored at 8.0 °C there was no occurrence of internal browning, despite of lower flesh firmness and more intense red color of the skin and flesh in comparison to the fruit stored at 1.5 °C. The treatm...
This study was carried out to determine fruit maturation indexes for apple cv. SCS425 Luiza for o... more This study was carried out to determine fruit maturation indexes for apple cv. SCS425 Luiza for optimum harvest period (OHP). Fruits were harvested weekly from 121 to 153 days after full bloom (DAFB) and assessed one day after harvest, and after seven months of CA storage. Considering fruit appearance, OHP for immediate consumption was between 138 and 153 DAFB. The substantial increase of ethylene production in fruit after 127 DAFB indicated they should be harvested until this date if intended to long-term storage. However, to achieve at least 50% of the fruit with red color skin corresponding to Category 1, the OHP should be from 127 DAFB. The OHP should not exceed 138 DAPF to minimize the incidence of pulp darkening and rot during storage. Maximum sensory quality of apples after storage occurred when harvested between 121 and 131 DAFB. Considering that the OHP for ‘SCS425 Luiza’ apples intended for seven months in CA storage is between 121 and 131 DAFB, the maturation indexes of t...
Revista Brasileira de Fruticultura, 2020
This work was carried out to evaluate the effect of fruit ripening stage at harvest (“1/3 ripe” a... more This work was carried out to evaluate the effect of fruit ripening stage at harvest (“1/3 ripe” and “3/4 ripe”, respectively with 30% and 75% of red color) and passive modified atmosphere (MA) and active MA (with initial initial low O2 and/or high CO2) on quality of ‘San Andreas’ strawberries, with emphasis on bioactive compounds and metabolites of fermentative metabolism. The treatments evaluated were: control; passive MA [low density polyethylene (LDPE) packaging of 40 µm]; active MA with initial low O2 (1 kPa); active MA with initial high CO2 (30 kPa); and active MA with initial low O2 (1 kPa) and high CO2 (30 kPa). After 14 days of storage (0.5±0.2°C/92±2% RH) followed by two days of shelf life (20±5°C/65±10% RH), fruit weight loss was higher in control fruit. Soluble solids content and titratable acidity were not different between treatments. Fruit harvested “1/3 ripe” were firmer and had less intense red color after storage than fruit harvested “3/4 ripe”. Storage conditions d...