Xylemic, Phloemic and Transpiration Flows to and From a Peach

Huguet, J.G.; Génard, Michel; Laurent, R.; Besset, Jacques; Bussi, Claude; Girard, T.

doi:10.17660/actahortic.1998.465.43

Cited by 12 publications

(10 citation statements)

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“…Hourly transpiration follows air temperature and VPD (Figs 1a,b and 2a,b), in agreement with Lescourret et al (2001), Wu et al (2003), and Huguet et al (1998). Positive linear relationships were found between fruit transpiration rate and VPD at both stage I (R 2 ¼ 0.81) and stage III (R 2 ¼ 0.92), demonstrating a tight coupling of fruit transpiration to environmental conditions.…”

Section: Discussionsupporting

confidence: 85%

“…In apple, grape, and citrus, among other species, fruit growth mechanisms have been investigated largely on a seasonal, but not a daily scale, from both the biophysical and biochemical points of view. In peach, many models have been developed to explain quantitatively several aspects of fruit growth in variable conditions of water stress and crop load during stage III Génard, 1998, 1999;Huguet et al, 1998;Génard et al, 2003). However, further experimental data are needed to validate them, particularly those that focus on the diurnal pattern of fruit growth.…”

Section: Introductionmentioning

confidence: 99%

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Vascular flows and transpiration affect peach (Prunus persica Batsch.) fruit daily growth

Morandi

Rieger

Grappadelli

2007

Journal of Experimental Botany

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The relative contributions of xylem, phloem, and transpiration to fruit growth and the daily patterns of their flows have been determined in peach, during the two stages of rapid diameter increase, by precise and continuous monitoring of fruit diameter variations. Xylem, phloem, and transpiration contributions to growth were quantified by comparing the diurnal patterns of diameter change of fruits, which were then girdled and subsequently detached. Xylem supports peach growth by 70%, and phloem 30%, while transpiration accounts for ;60% of daily total inflows. These figures and their diurnal patterns were comparable among years, stages, and cultivars. Xylem was functional at both stage I and III, while fruit transpiration was high and strictly dependent on environmental conditions, causing periods of fruit shrinkage. Phloem imports were correlated to fruit shrinkage and appear to facilitate subsequent fruit enlargement. Peach displays a growth mechanism which can be explained on the basis of passive unloading of photoassimilates from the phloem. A pivotal role is played by the large amount of water flowing from the tree to the fruit and from the fruit to the atmosphere.

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Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Vascular flows and transpiration affect peach (Prunus persica Batsch.) fruit daily growth

Morandi

Rieger

Grappadelli

2007

Journal of Experimental Botany

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“…Recorded diameter (D, mm) variations were transformed to the mass (M, g) changes by means of the empirical correlation found for peach, cv. &&Suncrest'': M"0.003D (Huguet et al, 1998); and the mass was assumed to be proportional to the volume. The observations were carried out on an intact (control) fruit, two so-called &&pedicel-girdled fruits'' (the bearing shoot was girdled just before and after the fruit pedicel to prevent the phloemic #ow from entering the pedicel), and one detached fruit that was picked at the beginning of the period of measurements and was suspended in the tree canopy at its previous position.…”

Section: Experimental Treatmentsmentioning

confidence: 99%

Theoretical Analysis of Systematic Errors Introduced by a Pedicel-Girdling Technique used to Estimate Separately the Xylem and Phloem Flows

Fishman

Génard²,

Huguet³

2001

Journal of Theoretical Biology

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“…El durazno tiene una alta tasa de transpiración, comparado con otras especies frutales, pero esta transpiración depende de la permeabilidad cuticular al agua y las condiciones climáticas (Huguet et al, 1998). Además, se ha encontrado que las hojas son el sitio de mayor resistencia hidráulica, y en el caso del durazno existen evidencias que indican que el control estomático es pobre y que su xilema es altamente vulnerable (Améglio et al, 1998).…”

Section: Introductionunclassified

“…La resistencia a sequía en durazno está caracterizada por un bajo flujo, tanto en xilema como en floema (Huguet et al, 1998). Por otra parte, Reyes-Santamaría et al (2002) encontraron en aguacate presencia de vasos con diámetros menores, para aquellos genotipos que tienen una menor vulnerabilidad.…”

Section: Introductionunclassified

Variabilidad anatómica de los sistemas de conducción y estomático de genotipos de Prunus spp. de diferentes orígenes

Núñez-Colín

Barrientos-Priego

Rodríguez-Pérez

et al. 2006

Pesq. agropec. bras.

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Resumen -El propósito de esta investigación fue estudiar las relaciones ambientales de disponibilidad de humedad, con las características anatómicas del sistema de conducción de agua y estomático, en cinco genotipos de duraznos mexicanos con diferentes orígenes (Jalatzingo y Misantla, Veracruz; Temascaltepec, México; Tulancingo, Oaxaca; Sombrerete, Zacatecas), un almendro y el portainjerto Nemaguard. Fueron caracterizados anatómicamente brotes, hojas y estomas de plántulas de seis meses de edad, mediante 25 caracteres. El almendro y el portainjerto Nemaguard presentaron diferencias con respecto a los duraznos, los cuales tuvieron mayor similitud, aunque mantuvieron una separación acorde con su origen. Los caracteres que diferenciaron los grupos fueron: densidad estomática, grosor de la epidermis superior, número, frecuencia y perímetro de vasos, el índice de vulnerabilidad de la nervadura central, y el porcentaje de médula, xilema y floema del brote. Las condiciones de disponibilidad de humedad del origen presentaron fuerte asociación con las características anatómicas estudiadas, debido a que los ambientes con mayor déficit de humedad (Tulancingo y Sombrerete) presentaron mayor tamaño y menor frecuencia de vasos de xilema, así como bajo porcentaje de xilema y floema en brote, lo que puede interpretarse como adaptaciones de resistencia a sequía. La zona donde es rara la ocurrencia de sequía (Jalatzingo) presentó características opuestas.Términos para indexación: Prunus persica, Prunus dulcis, durazneros, almendro, xilema, estomas. Anatomical variability of water conduction and stomatal systems in genotypes of Prunus spp. of different originsAbstract -The aim of this research was to study the relationships between environmental humidity availability and the anatomical characteristics of water conduction and stomatal systems, in five Mexican peach genotypes with different origins (Jalatzingo and Misantla, Veracruz; Temascaltepec, México; Tulancingo, Oaxaca; Sombrerete, Zacatecas), one almond and Nemaguard rootstock. Shoots, leaves and stomata of six months old plants were anatomically characterized by means of 25 characters. The almond tree and the rootstock Nemaguard showed differences in relation to the peaches, which had higher similarity, although they maintained a separation according to their origin. Groups were differentiated by the following characters: stomatal density; width of the leaf upper epidermis; number, frequency and perimeter of xylem vessels; and the index of vulnerability of the leaf central vein, pith, xylem and phloem percentage of the shoot. The conditions of humidity availability of their origin showed strong association with the studied anatomical characteristics, because the environment with more deficit of humidity (Tulancingo and Sombrerete) showed plants with bigger size and smaller frequency of vessels of xylem, as well as low xylem and phloem percentage in shoot, which can be interpreted as resistance adaptations to drought. The area where the occurrence of drought (Jalatzingo) is r...

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Xylemic, Phloemic and Transpiration Flows to and From a Peach

Cited by 12 publications

References 0 publications

Vascular flows and transpiration affect peach (Prunus persica Batsch.) fruit daily growth

Vascular flows and transpiration affect peach (Prunus persica Batsch.) fruit daily growth

Theoretical Analysis of Systematic Errors Introduced by a Pedicel-Girdling Technique used to Estimate Separately the Xylem and Phloem Flows

Variabilidad anatómica de los sistemas de conducción y estomático de genotipos de Prunus spp. de diferentes orígenes

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