Journal ArticleDOI
Afternoon Depression In Photosynthesis in Grapevine Leaves—Evidence for a High Light Stress Effect
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TLDR
Les caracteristiques photosynthetiques des feuilles exposees a des densites de flux de photons fortes and moderees ont ete comparees afin de comprendre le role d'une exposition prolongee a une forte luminosite.Abstract:
Recherche des causes de la diminution des echanges gazeux l'apres-midi chez la vigne. Apres avoir verifie que cette diminution de l'activite photosynthetique avait bien lieu dans les feuilles de plantes correctement arrosees et en absence de stress dus a la temperature ou a l'humidite de l'air; les caracteristiques photosynthetiques des feuilles exposees a des densites de flux de photons fortes et moderees ont ete comparees afin de comprendre le role d'une exposition prolongee a une forte luminositeread more
Citations
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Journal ArticleDOI
Understanding plant responses to drought — from genes to the whole plant
TL;DR: Attention is drawn to the perception and signalling processes (chemical and hydraulic) of water deficits, which are essential for a holistic understanding of plant resistance to stress, which is needed to improve crop management and breeding techniques.
Journal ArticleDOI
How Plants Cope with Water Stress in the Field? Photosynthesis and Growth
Maria Manuela Chaves,João Pereira,João Maroco,Maria Luísa Rodrigues,Cândido Pinto Ricardo,Maria Leonor Osório,Isabel S. Carvalho,T. Faria,Carla Pinheiro +8 more
TL;DR: Differences among species that can be traced to different capacities for water acquisition, rather than to differences in metabolism at a given water status, are described.
Journal ArticleDOI
Effects of Water Deficits on Carbon Assimilation
TL;DR: It is now established that the rate of C02 assimilation in the leaves is depressed at moderate water deficits, mostly as a consequence of stomatal closure, and carbon assimilation may diminish to values close to zero without any significant decline in mesophyll photosynthetic capacity.
Journal ArticleDOI
Grapevine under deficit irrigation: hints from physiological and molecular data.
Maria Manuela Chaves,Maria Manuela Chaves,Olfa Zarrouk,Rita Francisco,J. M. Costa,J. M. Costa,Thiago de Santana Santos,Thiago de Santana Santos,A. P. Regalado,M. L. Rodrigues,Carlos M. Lopes +10 more
TL;DR: Rules under water deficit of genes and proteins of the various metabolic pathways responsible for berry composition and therefore wine quality are reviewed, and differences in this respect between grapevines varieties and experimental conditions are discussed.
Journal ArticleDOI
Paradigm shift in plant growth control
TL;DR: This work suggests that in most cases, poorly understood processes of tissue formation and cell growth are governing carbon demand, and thus, CO2 uptake, and that this view is not reflecting reality, but emerged from the availability of methods and process understanding at leaf level.
References
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Journal ArticleDOI
Some relationships between the biochemistry of photosynthesis and the gas exchange of leaves.
TL;DR: It was found that the response of the rate of CO2 Assimilation to irradiance, partial pressure of O2, p(O2), and temperature was different at low and high intercellular p(CO2), suggesting that CO2 assimilation rate is governed by different processes at lowand high inter cellular p (CO2).
Journal ArticleDOI
The control of leaf photosynthesis rate by the level of assimilate concentration in the leaf: A review of the hypothesis
T. F. Neales,L. D. Incoll +1 more
TL;DR: In this article, the authors propose a method to solve the problem of "missing links" in the context of artificial intelligence.VI. VII. VIII. IX. X. X
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Characterisation of Non-Uniform Photosynthesis Induced by Abscisic Acid in Leaves Having Different Mesophyll Anatomies
TL;DR: Results indicate that the apparent non-stomatal inhibition of photosynthesis by ABA deduced from the depression of A(Pi) relationship is an artifact which can be attributed to the non-uniform distribution of transpiration and photosynthesis over the leaf.
Journal ArticleDOI
Kok effect and the quantum yield of photosynthesis : light partially inhibits dark respiration.
TL;DR: The Kok effect was observed at saturating pCO(2) and, therefore, could not be explained by a change in photorespiration and was minimized when dark respiration was minimized, indicating that a partial suppression ofdark respiration by light is responsible.