Stefano Predieri | Consiglio Nazionale delle Ricerche (CNR) (original) (raw)

Papers by Stefano Predieri

… e investigación agraria, Jan 1, 2011

... Marcos Mora 1 , Jacqueline Espinoza 2 , Berta Schnettler 3 , Gemma Echeverría 4 , Stefano Pre... more ... Marcos Mora 1 , Jacqueline Espinoza 2 , Berta Schnettler 3 , Gemma Echeverría 4 , Stefano Predieri 5 , and Rodrigo Infante 6. ... There are various points of view, ranging from those that suggest this relationship is direct (Wheatley et al, 1977; Phillips et al, 1983; Curry and Riesz ...

Rivista di frutticoltura e di ortofloricoltura, Jan 1, 2005

... Studiare la quilità per valorizzare la ciliegia. Autores: Stefano Predieri; Localización: Riv... more ... Studiare la quilità per valorizzare la ciliegia. Autores: Stefano Predieri; Localización: Rivista di frutticoltura e di ortofloricoltura, ISSN 0016-2310, Vol. 67, Nº 3, 2005 , págs. 36-40. Fundación Dialnet. Acceso de usuarios registrados. ...

International journal of food, …, Jan 1, 2009

Apricot production, about 2.6 million tonnes in 2005, is mainly based on traditional cultivars pr... more Apricot production, about 2.6 million tonnes in 2005, is mainly based on traditional cultivars providing standard quality levels for this very popular and appreciated temperate fruit. However, while in many other fruit crops the aim is the standardization of the product, changes in apricot market features requires the introduction of new cultivars. A huge evolution of fruit traits has been already observed over time, with major modification of fruit quality attributes such as firmness and external colour. Breeding perspectives includes environmental adaptability, resistance to diseases and fruit quality. Apricot germplasm provides a wide choice of parental material for crossing which could offer excellent opportunities for breeding. A first important breeding tool is the development of molecular maps to tag genes and to find molecular markers associated with those genomic regions responsible of complex or polygenic traits as are those that define fruit quality. This allows the development of breeding programs based on the information about where genes/quantitative trait loci (QTLs) are located and on marker-assisted selection (MAS). The determination of intrinsic quality can be supported by the use of rapid and non-destructive methods such as gas chromatography-mass spectrometry coupled with olfactometry, e-nose, FT-MIR and NIR technologies. Apricot fruit quality is associated with attributes such as appearance, texture, taste and colour. Sensory evaluation coupled with consumer science can provide predictions in consumer preference trends and help breeder's decision-making in selection. This paper discusses how breeding and marketing should work more closely, developing projects based on up-to-date technologies and strategies, able to direct cultivar pursue toward the improvement of horticultural and market requirements, guarantying consumer satisfaction.

… e Investigación Agraria, Jan 1, 2011

M. Mora, J. Espinoza, B. Schnettler, G. Echeverría, S. Predieri, and R. Infante. 2011. Perceived ... more M. Mora, J. Espinoza, B. Schnettler, G. Echeverría, S. Predieri, and R. Infante. 2011. Perceived quality in fresh peaches: an approach through structural equation modeling. Cien. Inv. Agr. 38(2): 179-190. The quality requirements that consumers consider in their decision to purchase fresh fruit have garnered a great deal of attention from the actors in the fresh fruit productivity chain. This study seeks to identify attributes that could explain how a consumer of fresh peaches perceives quality. The focus on the peach was because of the limited knowledge of the signs of quality that the consumer is seeking in this fruit. As a result, the objective was to produce a model that explains the perception of the quality of fresh peaches by Spanish consumers. A theoretical model was created that explains quality using a set of intrinsic and extrinsic attributes. The information was from a survey of closed questions administered in person to a non-probabilistic sample of 192 Spanish consumers. The methodology used was structural equation modeling, with an analysis for goodness of fit using the indicators CMIN/ DF, RMR, NFI, RFI, RMSEA, and HOELTER. Thus, by adjusting the values recommended by the literature, a model was identified that explains the quality decisions of the consumers studied using two sets of attributes: intrinsic and extrinsic. Finally, significant and strong relationships were established between the perceived quality and the homogeneity of the fruit and between the perceived quality and the availability in supermarkets and fruit stores.

Abstract This edited volume reviews the current status and trends in research of different field ... more Abstract This edited volume reviews the current status and trends in research of different field crops. Individual chapters cover anther and microspore culture, protoplast culture and fusion somaclonal variation, and induced mutations in relation to crop improvement. A few ...

Riv. Fruttic. Ortofloric, Jan 1, 1988

SIDALC - Servicio de Informacion y Documentacion Agropecuaria de las Americas.

Trees-Structure and Function, Jan 1, 2000

Abstract Differently aged needles from a Pinus nigra Arnold tree growing in a typical urban area ... more Abstract Differently aged needles from a Pinus nigra Arnold tree growing in a typical urban area have been examined by means of electron paramagnetic resonance (EPR) spectroscopy, and the variation of the observed six-line Mn (II) signal was monitored for 1 ...

Journal of Food, Agriculture & Environment, Jan 1, 2003

Sweet cherry production is geographically limited to temperate zones that both have sufficient co... more Sweet cherry production is geographically limited to temperate zones that both have sufficient cold winters to meet the chilling requirement of the cherry tree and have summers that allow development of fruits of high quality. Studies of chilling showed its influence on both vegetative and generative growth, and that cyanamide to a certain extent can replace chilling in some varieties. Spring frost and adverse weather conditions during blossom caused reduced fruit set, while high temperatures during differentiation of pistil primordial cause fruit malformation, the latter problem was reduced by use of sprinkler irrigation. Water and nutrient supply to sweet cherry trees are important in the period that includes blossom, fruit growth and harvest, but also in a postharvest period when flower differentiation occurs. Balancing the supply to both vegetative and generative organs that act as sinks is crucial. It can be influenced by bioregulators such as gibberellic acids and cyanamide. Tree size is controlled mainly by choice of rootstock of which many are available from ongoing testing programs. Pruning is used to control tree size as well, but can cause injuries difficult to heal, while growth regulators such as paclobutrazol have negative environmental effects. Nutrient supply to cherry trees is highly dependent on soil types and rootstock.

Plant Cell, Tissue and Organ Culture, Jan 1, 2007

Tissue cultured plants' vessel headspace is subject to changes during subculture, and the analysi... more Tissue cultured plants' vessel headspace is subject to changes during subculture, and the analysis of its variation offers a non-destructive approach for monitoring plant physiology. Among the volatile organic compounds (VOCs) that can be released by plants and be potentially recovered in the airspace of plant tissue cultures, terpenes are very important since they can offer a snapshot of the physiological status of the plant under in vitro cultivation. Terpenes are synthesized from carbon directly shunted from the photosynthetic carbon fixation cycle and their emission is under genetic and environmental control. The experiments described in this paper propose the evaluation of the plant terpene profile in the culture's headspace as an early indicator of plant stress through the characterization of plant terpene production. Monitoring of terpene emission as a plant response to mechanical stress such as plant wounding showed an increased isoprene and monoterpene emission rates in the first hour after cutting. The comparison of headspace composition of cultures of two fruit rootstocks, Colt and GF677, showed the former having higher emissions of isoprene, a-pinene and limonene than the latter. A decreasing emission trend was observed during subculture, apparently as a result of culture aging. The in vitro headspace analysis of different myrtle (Myrtus communis L.) clones showed a specific and distinctive terpene emission profile. VOC monitoring of in vitro culture headspace is discussed as a non-destructive approach useful for its relation with major physiological activities of culture and for the determination of the potential production of terpenes.

Plant cell, tissue and …, Jan 1, 1991

The effects of humic substances on in vitro culture of 'Golden Delicious' apple are reported. Pot... more The effects of humic substances on in vitro culture of 'Golden Delicious' apple are reported. Potassium humate (KH) when used in proliferation showed a negative interaction with BA while it enhanced rooting when IBA was not present in the culture medium. In the presence of IBA, KH increased root number and reduced root growth. The highest concentration tested, 500 mg 1-i, caused a drastic reduction in root system development. 50 mg 1-1 KH hastened rooting and plants grew more rapidly when transferred to soil.

JOURNAL OF FOOD …, Jan 1, 2004

Cherry fruit quality is determined by attributes that affect fruit marketing appeal and consumer ... more Cherry fruit quality is determined by attributes that affect fruit marketing appeal and consumer satisfaction at consumption. The quantification of specific cherry fruit quality parameters is of high importance in the orientation of the decision-making process at every production step, from the choice of cultivar and agricultural practices to be applied, to the determination of harvest date, always geared towards ultimate consumer satisfaction. This review discusses opportunities for fruit quality evaluation and improvement.

Journal of Food Quality, Jan 1, 2008

The objective of this research was to evaluate the shelf life of two nectarine flesh typologies i... more The objective of this research was to evaluate the shelf life of two nectarine flesh typologies in order to determine the exporting potential of fresh nectarines to distant markets. "Maria Dolce" (subacid fruit type) and "Venus" (normal fruit type) nectarines were harvested at two maturity stages, based on fruit ground color. Fruits were stored at 0C and 90% R.H. for 14 or 42 days, simulating storage duration aimed respectively to shipping to close or distant marketplaces. Nectarines were evaluated after a period of ripening at 20C, when flesh firmness reached 9.8-19.6 N. Visual appearance, color, aroma, flesh texture, sweetness, sourness, juiciness, flavor and acceptability were evaluated. Both varieties presented a better eating quality when harvest was delayed. "Maria Dolce" presented high storage ability, reaching even at 42 days the same acceptability of fruit not subjected to cold storage. "Venus" showed a significant decrease in acceptability, indicating a not sufficient tolerance to long storage.

Biochemical Systematics …, Jan 1, 2008

... Artemisinin concentration vary with genotype ([Charles et al., 1990] and [Jain et al., 1996])... more ... Artemisinin concentration vary with genotype ([Charles et al., 1990] and [Jain et al., 1996]), plant tissue and time of harvesting ([Laughlin, 1993], [Laughlin, 1995], [Morales et al., 1993] and [Ferreira and Janick, 1996]), and is influenced by soil and climatological conditions ([Van ...

… REVIEWS-WESTPORT THEN NEW …, Jan 1, 2002

... Preharvest Factors 2. Maturity at Harvest 3. Storage Conditions C. Fruit Physiology 1. Intra-... more ... Preharvest Factors 2. Maturity at Harvest 3. Storage Conditions C. Fruit Physiology 1. Intra-fruit Volatiles Location 2. Ripening 3. Senescence 4. Disorders * The authors acknowledge GraziellaCristoferi, James P. Mattheis, Patrizia Salamone, Ester A. Sztein, and David Sugar for ...

Plant cell, tissue and organ culture, Jan 1, 1995

The effect of varying light regimes on in vitro rooting ofmicrocuttings of two pear (Pyrus commun... more The effect of varying light regimes on in vitro rooting ofmicrocuttings of two pear (Pyrus communis L.) cultivars was investigated. Cultures of the easy-to-root 'Conference' and the difficult-to-root 'Doyenne d'Hiver' were incubated for 21 days with or without indole-3-butyric acid (IBA) in the medium in darkness or under continuous far-red (8 /~.mol m -2 s -1 , blue, white or red (15 or 36 #mol m -2 s -~) light. 'Conference' rooted without IBA when exposed to red, blue or white light while no rooting was observed under far-red light and in darkness. The high rooting efficiency under red and, by contrast, the inhibition under far-red light and darkness suggest the involvement of the phytochrome system in rhizogenesis. The addition of IBA to the culture medium enhanced root production under all light regimes in both cultivars. Red light, especially at the lower photon fluence rate, had a positive effect by increasing root extension (number x length of roots) and stimulating secondary root formation.

Plant Molecular Biology Reporter, Jan 1, 2001

Abstract Pyrus communis L. is the most important pear species for European production. Very few c... more Abstract Pyrus communis L. is the most important pear species for European production. Very few cultivars satisfy standards for fruit quality and clonal fidelity; thus, accurate verification of cultivar identity for checking propagation material and patent protection is ...

Euphytica, Jan 1, 2001

In vitro shoots of six pear (Pyrus communis L.) cultivars, 'Conference', 'Doyenné d'Hiver', 'Pass... more In vitro shoots of six pear (Pyrus communis L.) cultivars, 'Conference', 'Doyenné d'Hiver', 'Passe Crassane', 'Bartlett', 'Abbé Fetel' and 'Butirra Precoce Morettini' were irradiated with gamma rays (3.5 Gy). After three subcultures, microcuttings from the irradiated shoots and from additional non-irradiated microcuttings were rooted to establish plants for survey orchards. All trees were individually observed for variation in fruit traits and for productivity. Trees were selected for improved characters related to production such as early bearing and consistent productivity. Variations observed in fruit appearance concerned degree of russeting, fruit shape and size. The frequencies of the observed variations in fruit traits depended on the cultivar, ranging from 0.81% in 'Doyenné d'Hiver' to 3.64% in 'Passe Crassane'. Of the 97 variants selected, only two showed chimeral behavior.

… Symposium on In Vitro …, Jan 1, 1989

Abstract: Shoots were regenerated from M. 26 and MM. 106 apple clonal rootstocks in vitro leaves,... more Abstract: Shoots were regenerated from M. 26 and MM. 106 apple clonal rootstocks in vitro leaves, cloned and tested on proliferation media enriched with 10 or 25% Phytophthora cactorum culture filtrate. Some of the somaclones showed a higher resistance to the ...

Physiologia …, Jan 1, 1993

Influence of UV-B radiation on developmental changes, ethyiene. CO, flux and polyamines in cv. Do... more Influence of UV-B radiation on developmental changes, ethyiene. CO, flux and polyamines in cv. Doyenne d'Hiver pear shoots grown in vitro. -Physiol. Plant. S7: 109-117.

Plant cell, tissue and organ culture, Jan 1, 2001

This review describes in vitro mutation induction methods in fruits and the in vitro selection pr... more This review describes in vitro mutation induction methods in fruits and the in vitro selection procedures available for early screening. Results obtained through in vitro mutation techniques, including somaclonal variation, are reviewed and compared with the current achievements and future prospects of transgenic breeding. Plant improvement based on mutations, which change one or a few specific traits of a cultivar, can contribute to fruit improvement without altering the requirements of fruit industry. Induced mutations have well defined limitations in fruit breeding applications, but their possibilities may be expanded by the use of in vitro techniques. Tissue culture increases the efficiency of mutagenic treatments for variation induction, handling of large populations, use of ready selection methods, and rapid cloning of selected variants. Molecular techniques can provide a better understanding of the potential and limitations of mutation breeding e.g. molecular marker-assisted selection, which can lead to the early identification of useful variants. The relatively high number of research reports compared with the low number of cultivars released suggests that mutagenesis in combination with tissue culture is either ineffective or has yet to be exploited in fruits. Positive achievement recorded in other species seem to support the hypothesis that in vitro mutation induction has high potential also for fruit improvement. The possible contribution of a well-pondered and coordinated use of the numerous mutation induction, mutant selection, and field validation procedures available to advances in fruit breeding is discussed.