ABA‐based chemical signalling: the co‐ordination of responses to stress in plants

Wilkinson, Sally; Davies, W. J.

doi:10.1046/j.0016-8025.2001.00824.x

Cited by 882 publications

(614 citation statements)

References 111 publications

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“…abscisic acid) in plants grown on soil with a low water potential (Davies and Zhang, 1991;Li et al, 2000;Schroeder et al, 2001;Wilkinson and Davies, 2002;Chaves et al, 2009;Pinheiro and Chaves, 2011) or by the CO2 concentration in the leaf (Vavasseur and Raghavendra, 2005) is well known. Besides the reversible regulation of stomatal opening, transpiration and leaf temperature may be affected by the deposition of cuticular waxes or by the formation of stomatal plugs in a less reversible or even irreversible manner (Stockey and Ko, 1986;Kozlowski and Pallardy, 2002;Gallé and Feller, 2007;Zhu et al, 2014).…”

Section: Photosynthetically Active Leaf Areamentioning

confidence: 99%

Drought stress and carbon assimilation in a warming climate: Reversible and irreversible impacts

Feller

2016

Journal of Plant Physiology

122

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Global change is characterized by increased CO2 concentration in the atmosphere, increasing average temperature and more frequent extreme events including drought periods, heat waves and flooding. Especially the impacts of drought and of elevated temperature on carbon assimilation are considered in this review. Effects of extreme events on the subcellular level as well as on the whole plant level may be reversible, partially reversible or irreversible. The photosynthetically active biomass depends on the number and the size of mature leaves and the photosynthetic activity in this biomass during stress and subsequent recovery phases. The total area of active leaves is determined by leaf expansion and senescence, while net photosynthesis per leaf area is primarily influenced by stomatal opening (stomatal conductance), mesophyll conductance, activity of the photosynthetic apparatus (light absorption and electron transport, activity of the Calvin cycle) and CO2 release by decarboxylation reactions (photorespiration, dark respiration). Water status, stomatal opening and leaf temperature represent a "magic triangle" of three strongly interacting parameters. The response of stomata to altered environmental conditions is important for stomatal limitations. Rubisco protein is quite thermotolerant, but the enzyme becomes at elevated temperature more rapidly inactivated (decarbamylation, reversible effect) and must be reactivated by Rubisco activase (carbamylation of a lysine residue). Rubisco activase is present under two forms (encoded by separate genes or products of alternative splicing of the premRNA from one gene) and is very thermosensitive. Rubisco activase was identified as a key protein for photosynthesis at elevated temperature (non-stomatal limitation). During a moderate heat stress Rubisco activase is reversibly inactivated, but during a more severe stress (higher temperature and/or longer exposure) the protein is irreversibly inactivated, insolubilized and finally degraded. On the level of the leaf, this loss of photosynthetic activity may still be reversible when new Rubisco activase is produced by protein synthesis. Rubisco activase as well as enzymes involved in the detoxification of reactive oxygen species or in osmoregulation are considered as important targets for breeding crop plants which are still productive under drought and/or at elevated leaf temperature in a changing climate.

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Section: Photosynthetically Active Leaf Areamentioning

confidence: 99%

Drought stress and carbon assimilation in a warming climate: Reversible and irreversible impacts

Feller

2016

Journal of Plant Physiology

122

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“…ABA is known to regulate stomatal aperture and gas exchange, particularly in water deficit conditions (Wilkinson and Davies 2002). In the current study, a significant QTL for ABA on chromosome 4 (lABA4.1_E4) colocalized with QTLs for Δ 13 C, SCO, and C i /C a .…”

Section: Discussionmentioning

confidence: 99%

Genetic Analysis of Water Use Efficiency in Rice (Oryza sativa L.) at the Leaf Level

This

Comstock

Courtois

et al. 2010

Rice

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Carbon isotope discrimination (Δ 13 C) is considered as an index of leaf-level water use efficiency, an important objective for plant breeders seeking to conserve water resources. We report in rice a genetic analysis for Δ 13 C, leaf structural parameters, gas exchange, stomatal conductance, and leaf abscisic acid (ABA) concentrations. Doubled haploid and recombinant inbred populations, both derived from the cross IR64 × Azucena, were used for quantitative trait locus (QTL) analysis following greenhouse experiments. Δ 13 C QTLs on the long arms of chromosomes 4 and 5 were colocalized with QTLs associated with leaf blade width, length, and flatness, while a QTL cluster for Δ 13 C, photosynthesis parameters, and ABA was observed in the near-centromeric region of chromosome 4. These results are consistent with phenotypic correlations and suggest that genetic variation in carbon assimilation and stomatal conductance contribute to the genetic variation for Δ 13 C in this population.

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“…Root signals were reviewed by Comstock (2002), who concluded that ABA, transported in the xylem from root to shoot and perceived at the guard cell, is an essential regulating factor for stomatal closure under drought stress. ABA plays an important role in the plant's response to water deficit (Pospíšilová, 2003), as established in recent reviews on changes in ABA content during water deficit, as well as the response of stomata to ABA signalling (Assmann and Armstrong, 1999;Blatt, 2000;Rock, 2000;Ng et al, 2001;Schroeder et al, 2001;Wilkinson and Davies, 2002;Zhang et al, 2006). This signalling mechanism provides the plant with a stomatal response system in which water potential is perceived in the root as a primary indication of soil water status.…”

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confidence: 99%

Stomatal Responses in Rainfed Lowland Rice to Partial Soil Drying ; Evidence for Root Signals

Siopongco

Sekiya

Yamauchi

et al. 2008

Plant Production Science

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ABA‐based chemical signalling: the co‐ordination of responses to stress in plants

Abstract: There is now strong evidence that the plant hormone abscisic acid (ABA) plays an important role in the regulation of stomatal behaviour and gas exchange of droughted plants.

Cited by 882 publications

References 111 publications

Drought stress and carbon assimilation in a warming climate: Reversible and irreversible impacts

Drought stress and carbon assimilation in a warming climate: Reversible and irreversible impacts

Genetic Analysis of Water Use Efficiency in Rice (Oryza sativa L.) at the Leaf Level

Stomatal Responses in Rainfed Lowland Rice to Partial Soil Drying ; Evidence for Root Signals

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