Role of Ethanol in the Vase Life and Ethylene Production in Cut Lisianthus (Eustoma grandiflorum Mariachii. cv. Blue) Flowers (original) (raw)
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This study examined the effects of different chemical substances applied to vase solutions on the post-harvest physiology of cut stems of lisianthus (Eustoma grandiflorum.). Keeping cut stems of lisianthus in vase solutions containing sucrose, Salicylic acid, NaOCl, ascorbic acid, 8-HQC and their combinations improved the water balance of Lisianthus cut stems ultimately leading to improvement in vase life and floret opening. The results of the study indicated that cut lisianthus responded positively to the treatment combination of Sucrose @ 2.5% + Salicylic acid @ 200 mg l-1 + NaOCl 50 ppm, with Favourable vase life (21.92 days), average flower fresh weight (18.35g), physiological loss in weight (21.68) Relative water content (55.880) MSI, RWC. Overall, the results suggest that combination of these sucrose, Salicylic acid (SA), NaOCl chemicals can increase the vase life of lisianthus cut flowers by improving the antioxidant system and reducing damages caused by oxidative stress during senescence. Introduction Vase life is one of the essential quality parameters which decide consumer preference of a cut flower crop. Lisianthus (Eustoma grandiflorum) flowers have gained wide popularity in India in recent decades as a cut flower. However, research reports on the post-harvest physiology of lisianthus flowers are meagre. There are many flowers and buds in the Eustoma inflorescence, hence, it is important to improve the post-harvest performance of the Eustoma inflorescence, encourage bud opening and postpone the open flower senescence. The vase life of cut Eustoma flowers is not long (Cho et al., 2001) [3] , and varies among cultivars however, there are few studies of the postharvest physiology of cut Eustoma flowers. Use of floral preservatives has been reported to reduce the level of postharvest losses in many cut flower crops. Various factors such as unfavourable water balance, development of microbes in the holding solutions etc, have been reported as major factors responsible for short vase life in cut flowers. Hence postharvest treatments with compounds witch ensure maintains of favourable water balance and prevention of microbial infestation in holding solution will capable reducing of senescence ultimately leading to extension of postharvest of cut flowers. The present study aimed at assessing the effect of various postharvest treatments on extending the vase life of cut stems of lisianthus variety Mariachi Blue.
2013
Lisianthus (Eustoma grandiflorum cv. 'Mriachii Blue') is one of the most important and marketable cut flowers in the world. However, a relatively limited vase life reduces its marketability. The aim of the present study was to evaluate the effects of essential oils in extending vase life of cut flowers of Lisianthus. For this purpose a factorial experiment based on a completely randomized design with Zataria multiflora and Echinophora platyloba essential oils at (0, 100, 200 ppm) with 3 replications, was conducted. The results showed that addition of essential oils to vase solutions increased vase life, petal water content, leaf relative water content and SPAD value, significantly. The highest vase life (14.5 days) was observed in the vase solution containing 200 ppm E. platyloba plus 100 ppm Z. multiflora essential oils with 95% increase as compared to the control. All essential oil treatments resulted in higher relative fresh weight as compared to the control; however the ...
Notulae Scientia …, 2011
The aim of the present study was to evaluate the effects of ethanol and essential oils of three medicinal plants namely Thyme (Thymus vulgaris L.), Summer savory (Satureja hortensis L.) and Ajwain (Carum copticum L.) on extending carnation (Dianthus caryophyllus) vase-life. For this purpose three individual trials were conducted using a completely randomized block design with three replications. In the first trial, the effect of 4% ethanol (v/v) as a continuous or pulse treatment was determined. The results showed that although both application methods increased vase-life and marketability of carnation, it was statistically non significant. In the second trial, the effects of selected essential oils at the concentration of 100, 150 and 200 ppm were investigated. All essential oils prolonged carnation vase-life. Summer savory essential oil (100 ppm) showed the highest effect (increasing 4.4 days) in comparison to the control. In the third trial, the interaction between ethanol and the essential oils was studied. Results showed there is no significant difference between application of essential oils alone and in combination with ethanol. The highest fresh weight was observed in cut flowers treated with Summer savory essential oil at 100 ppm after 6 days which was double compared to the control. According to the results of this research it is concluded that essential oils, (natural, safe and biodegradable compounds) as novel alternative materials are suitable for prolongation of carnation vase-life.
Efficiency of Preservative Solutions on the Postharvest Life/Longevity of Lisianthus Flowers 'Abc
Acta Horticulturae, 2015
Lisianthus, Eustoma grandiflorum (syn. E. russelianum), native to northern Mexico and the southern United States is commonly used as a cut flower in Brazil. The shelf life of the flowers can be prolonged by the use of preservative solutions. To evaluate the efficiency of different preservative solutions on the postharvest life/longevity this experiment was performed using lisianthus cultivar 'ABC'. Cut flowers with 5 buds and 2 open flowers were treated with 3% sucrose, 3% sucrose + 2% ethanol, 3% sucrose + 15% citric acid, Flower ® (Ecoplanet, SC), and water. The stems were individualized in 200 ml flasks with different solutions provided in the pulsing form for a period of 24 h. The effect of different treatments was determined by the amount of water uptake, flower quality, stems fresh weight and the rate of flower opening as follows from the scale 0 = flower bud to 4 = open flowers. Results suggest that 3% sucrose solution was more effective in improving postharvest life of lisianthus cut flowers cultivar 'ABC'.
2014
Leaf yellowing is a major problem in postharvest of Alstroemeria cut flowers. For delaying of leaf yellowing and increasing flower quality a completely randomized factorial design was carried out on the Alstroemeria cut flowers (‘Fuji’ cultivar). In this research Ethanol (0, 2, 4, 6%), GA3 (0, 50, 100, 150 mg/litre) in two methods (pulse and continuous) were investigated on the flower vese life and other qualitative traits. There is 4% sucrose in all treatments except control. Result revealed that continuous treatment had more effect on the vase life and quality of flowers than pulse treatment. 4% Ethanol prolonged vase life and increased solution uptake. Increasing GA3 concentration in holding solution prolonged vase life and coused better retention of quality of cut flowers. However had no significant difference in 100 &150 mg/L GA3 in flower vase life, solution uptake and fresh weight? Moreover GA3 in pulse treatment had more effect than continuous treatment on better retention o...
Effect of ethanol on the longevity and abscission of bougainvillea flower
2007
The experiment was carried out to study the effect of different concentrations of ethanol on bougainvillea flower vase life and delayed abscission. Young and fresh flowers were harvested from 4-year-old bougainvillea trees randomly. Flower stems (petiole) were placed individually in an open solution containing different concentrations of ethanol immediately after harvesting. The solutions used for treatment were water (control), 2, 4, 8, 10, 20, 30, 40, 50 and 70% ethanol. Positive responses were found in the case of 8 and 10% ethanol after 5 days of treatment. Flower longevity was 2 days longer in 8 and 10% ethanol than in water control and other concentrations of ethanol. Petal wilting and abscission occurred 2 days later than water control. Perianth abscission was later in 8 and 10% ethanol than water control. Percent petal scar (color changing) was later in water control, 2, 4, 8 and 10 than 20, 30, 40, 50 and 70% ethanol The result showed that the flower vase life was significantly affected by ethanol concentrations and longevity was more in 8 and 10% ethanol than water control and other concentrations.
The production of Alstroemeria flowers has been rapidly increasing in the world. In this research effect of different concentrations of ethanol (4, 7, 10%) methanol (4, 7, 10%) as pulse treatments and some essential oils (50 or 100 mg L −1 peppermint (Mentha piperata L.), thyme (Thymus vulgaris L.) and black cumin (Bunium persicum (Boiss.) B. Fedtsch)) on flower longevity, solution uptake, fresh weight and SPAD value as a measure of leaf greenness of Alstroemeria peruviana 'santorini' were analyzed. Results showed alcohol treatments had no positive effect on increasing vase life of Alstroemeria. Applying essential oils could extend the vase-life. The greatest longevity of vase life was related to 50 mg L −1 of thyme essential oil treatment and approximately it improved inflorescence cut vase life more than 2 days longer than control treatment. The greatest solution uptake and decrease in fresh weight were seen in 100 mg L −1 peppermint essential oil and 100 mg L −1 thyme essential oil, respectively. Essential oils could not maintain SPAD value in higher amount than control treatment but these compounds particularly 50 mg L −1 thyme, peppermint and black cumin essential oil are useful for increasing vase life of Alstroemeria.
Treatment with Peracetic Acid Extends the Vase Life of Lisianthus (Eustoma grandiflorum) Flowers
HortScience
The effect of peracetic acid on the vase life and bud opening of cut flowers of Lisianthus was investigated. Eustoma grandiflorum is an attractive cut flower with a considerable length of vase life (usually weeks for freshly harvested stems). It is well known that the addition of sucrose into the vase solution increases significantly the longevity of cut flowers. Two different experiments of vase life were carried out. The first used cultivars of the Mariachi Series: Blue, Green, Blue Picotee, and Pink, whereas the second used Rosita White and Piccolo White 1. The control plants (T1) were supplied with tap water. Treatment 2 (T2) was similar to T1 with the addition of 3% sucrose. In the third (T3) and fourth (T4) treatments, sodium hypochlorite and a stabilized peracetic mixed system (PAA) were added, respectively. The number of flowers that opened from buds between cultivars was significantly different. With the addition of sucrose into the vase solution, a significant increase in ...
Journal of Ornamental plants, 2014
The postharvest life of cut Eustoma grandiflorum flowers is limited in open flowers. Therefore a factorial experiment based on a completely randomized design with ascorbic acid (AsA) at 4 levels (0, 100, 200, 300mg L-1) and citric acid (CA) at 3 levels (0, 100, 200 mg L-1) with 3 replications and 3 samples for each replications, was conducted for this purpose. Results indicated that a significant increase with applying ascorbic and citric acid nearly in all traits both individually and in combination, with higher concentrations imposing greater effects (p≤0.05 and p≤0.01). The highest vase life (17.6 days) and petal water content (68.9%) was observed for the interaction of ascorbic acid (300 mg L-1) and citric acid(100 mg L-1) and ascorbic acid (300 mg L-1) and citric acid (200 mg L-1), re-spectively, which shows a 94 and 252% increase compared to control (9.1days and 27.3%). Along with this, relative water content and petal water content raised with AsA and CA increase. Water conte...
Influence of ethanol on the longevity and delayed senescence of bougainvillea flower
2008
The study was carried out to investigate the effect of ethanol (ET) at different concentrations on longevity and senescence delay in bougainvillea flowers. The treatments were water (control), 2, 4, 8, 10, 20, 30, 40, 50 and 70% ET. Positive response was found in case of 4, 8 and 10% of ET after a certain period of treatment application. Dry weight was higher in lower concentrations of ethanol and lower in higher concentrations. Flower longevity was 2 days longer in 4, 8 and 10% ET than in water control and other concentrations of ethanol. Petal wilting and abscission occurred 2 days later in 4, 8 and 10% ET than in control. Perianth abscission also appeared 2 days later in 4, 8 and 10% ET than in control. However, petal discoloration (color change) was later in control, 2, 4, 8 and 10% than in 20, 30, 40, 50 and 70% ET. The results showed that flower vase life was significantly affected by ethanol concentrations as well as longevity was longer in 4, 8 and 10% ET than in water control and other concentrations.