Water stress inhibits plant photosynthesis by decreasing coupling factor and ATP
- W. Tezara, V. Mitchell, S. Driscoll, D. Lawlor
- Environmental ScienceNature
- 28 October 1999
It is shown that ATP-synthase (coupling factor) decreases with stress and concluded that photosynthetic assimilation of CO2 by stressed leaves is not limited by CO2 diffusion but by inhibition of ribulose biphosphate synthesis, related to lower ATP content resulting from loss of ATP synthase.
Causes of decreased photosynthetic rate and metabolic capacity in water-deficient leaf cells: a critical evaluation of mechanisms and integration of processes.
A qualitative model of photosynthetic metabolism under WD is developed that explains many observations and considers techniques, and develops a testable hypotheses.
Effects of water deficit and its interaction with CO(2) supply on the biochemistry and physiology of photosynthesis in sunflower.
- W. Tezara, V. Mitchell, S. Driscoll, D. Lawlor
- Environmental ScienceJournal of Experimental Botany
- 1 August 2002
Elevated CO(2) will benefit sunflower growing under water deficit by marginally increasing P(n), and by slowing transpiration, which will decrease the rate and severity of water deficits, with limited effects on metabolism.
Contribution of stem CO2 fixation to whole-plant carbon balance in nonsucculent species
- E. Avila, A. Herrera, W. Tezara
- Environmental SciencePhotosynthetica (Praha)
- 1 March 2014
Stem net photosynthesis (SNP) is proposed, which includes net CO2 fixation by stems with stomata in the epidermis and net corticularCO2 fixation in suberized stems, and stem recycling photoynthesis (SRP), which defines CO2 ling in su berized stems.
Water relations and photosynthetic capacity of two species of Calotropis in a tropical semi-arid ecosystem.
- W. Tezara, R. Colombo, I. Coronel, Oranys Marín
- Biology, MedicineAnnals of Botany
- 1 March 2011
Ecophysiological traits such as high photosynthetic rate throughout the year even during the DS, and high WUE, highly pubescent leaves and low SLA observed in both species contribute to the establishment and growth of Calotropis in dry conditions.
Photosynthetic responses of the tropical spiny shrub Lycium nodosum (Solanaceae) to drought, soil salinity and saline spray.
- W. Tezara, D. Martínez, E. Rengifo, A. Herrera
- Medicine, BiologyAnnals of Botany
- 1 December 2003
Observations suggested that L. nodosum is tolerant both to WD and salinity, and osmotic adjustment may partly explain the relative maintenance of A and gs in the SS and SI treatments and the tolerance to salinity of plants of this species in coastal habitats.
ECOPHYSIOLOGICAL TRAITS OF ADULT TREES OF CRIOLLO COCOA CULTIVARS (THEOBROMA CACAO L.) FROM A GERMPLASM BANK IN VENEZUELA
- E. Ávila-Lovera, I. Coronel, W. Tezara
- BiologyExperimental Agriculture
- 29 January 2015
ES001 has the best physiological performance (ΨL remained unchanged, highest Amax, ACO2sat and photochemical activity), and it seems to be a promising cultivar for cocoa agroforestry systems in the southern region of Maracaibo.
Lack of downregulation of photosynthesis in a tropical root crop, cassava, grown under an elevated CO2 concentration.
- M. Fernández, W. Tezara, E. Rengifo, A. Herrera
- Environmental ScienceFunctional Plant Biology
- 1 July 2002
The absence of downregulation of photosynthesis was associated with a decrease in leaf sugar and starch contents of plants grown at elevated [CO2], which suggests a favourable source/sink relationship.
Photosynthesis and photoinhibition in two xerophytic shrubs during drought
- W. Tezara, Oranys Marín, E. Rengifo, D. Martínez, A. Herrera
- BiologyPhotosynthetica (Praha)
- 1 March 2005
Drought affected the capacity of energy dissipation of leaves, judging from the changes in the photochemical (qP) and non-photochemical quenching (NPQ) coefficients, and imposed an important limitation on carbon assimilation during drought in the species studied.
Partitioning of photosynthetic electron flow between CO2 assimilation and O2 reduction in sunflower plants under water deficit
- W. Tezara, S. Driscoll, D. Lawlor
- Environmental SciencePhotosynthetica (Praha)
- 1 March 2008
In sunflower (Helianthus annuus L.) grown under controlled conditions and subjected to drought by withholding watering, net photosynthetic rate (PN) and stomatal conductance (gs) of attached leaves…
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