scholarly journals GABA signalling modulates stomatal opening to enhance plant water use efficiency and drought resilience

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bo Xu ◽  
Yu Long ◽  
Xueying Feng ◽  
Xujun Zhu ◽  
Na Sai ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Guard Cell ◽  
Plant Stress ◽  
Stomatal Opening ◽  
Fine Tuning ◽  
Protein Amino Acid ◽  
Gaba Production ◽  
Anion Transporter ◽  
Use Efficiency

AbstractThe non-protein amino acid γ-aminobutyric acid (GABA) has been proposed to be an ancient messenger for cellular communication conserved across biological kingdoms. GABA has well-defined signalling roles in animals; however, whilst GABA accumulates in plants under stress it has not been determined if, how, where and when GABA acts as an endogenous plant signalling molecule. Here, we establish endogenous GABA as a bona fide plant signal, acting via a mechanism not found in animals. Using Arabidopsis thaliana, we show guard cell GABA production is necessary and sufficient to reduce stomatal opening and transpirational water loss, which improves water use efficiency and drought tolerance, via negative regulation of a stomatal guard cell tonoplast-localised anion transporter. We find GABA modulation of stomata occurs in multiple plants, including dicot and monocot crops. This study highlights a role for GABA metabolism in fine tuning physiology and opens alternative avenues for improving plant stress resilience.

scholarly journals Variation in MPK12 affects water use efficiency in Arabidopsis and reveals a pleiotropic link between guard cell size and ABA response

2014 ◽  
Vol 111 (7) ◽  
pp. 2836-2841 ◽  
Author(s):  
D. L. Des Marais ◽  
L. C. Auchincloss ◽  
E. Sukamtoh ◽  
J. K. McKay ◽  
T. Logan ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Cell Size ◽  
Water Use ◽  
Guard Cell ◽  
Use Efficiency ◽  
Aba Response

scholarly journals Guard cell endomembrane Ca2+-ATPases underpin a ‘carbon memory’ of photosynthetic assimilation that impacts on water-use efficiency

Nature Plants ◽  
2021 ◽  
Author(s):  
Mareike Jezek ◽  
Fernanda A. L. Silva-Alvim ◽  
Adrian Hills ◽  
Naomi Donald ◽  
Maryam Rahmati Ishka ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Guard Cell ◽  
Use Efficiency ◽  
Photosynthetic Assimilation

scholarly journals GABA signalling in guard cells acts as a ‘stress memory’ to optimise plant water loss

2019 ◽  
Author(s):  
Bo Xu ◽  
Yu Long ◽  
Xueying Feng ◽  
Xujun Zhu ◽  
Na Sai ◽  
...  
Keyword(s):  
Water Loss ◽  
Guard Cell ◽  
Plant Stress ◽  
Protein Amino Acid ◽  
Stress Memory ◽  
Anion Transporters ◽  
Gaba Production ◽  
Cell Plasma ◽  
Signalling Molecule ◽  
Plant Families

AbstractThe non-protein amino acid γ-aminobutyric acid (GABA) has been proposed to be an ancient messenger for cellular communication conserved across biological kingdoms. GABA has well-defined signalling roles in animals; however, whilst GABA accumulates in plants under stress it has not been determined if, how, where and when GABA acts as an endogenous plant signalling molecule. Here, we establish that endogenous GABA is a bona fide plant signal, acting via a mechanism not found in animals. GABA antagonises stomatal movement in response to opening and closing stimuli in multiple plant families including dicot and monocot crops. Using Arabidopsis thaliana, we show guard cell GABA production is necessary and sufficient to influence stomatal aperture, transpirational water loss and drought tolerance via inhibition of stomatal guard cell plasma membrane and tonoplast-localised anion transporters. This study proposes a novel role for GABA – as a ‘stress memory’ – opening new avenues for improving plant stress tolerance.

scholarly journals GABA: A Key Player in Drought Stress Resistance in Plants

2021 ◽  
Vol 22 (18) ◽  
pp. 10136
Author(s):  
Md. Mahadi Hasan ◽  
Nadiyah M. Alabdallah ◽  
Basmah M. Alharbi ◽  
Muhammad Waseem ◽  
Guangqian Yao ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Aminobutyric Acid ◽  
Plant Tolerance ◽  
Protein Amino Acid ◽  
Gaba A ◽  
Gaba Production ◽  
Physiological Processes ◽  
Anion Transporter ◽  
Use Efficiency

γ-aminobutyric acid (GABA) is a non-protein amino acid involved in various physiological processes; it aids in the protection of plants against abiotic stresses, such as drought, heavy metals, and salinity. GABA tends to have a protective effect against drought stress in plants by increasing osmolytes and leaf turgor and reducing oxidative damage via antioxidant regulation. Guard cell GABA production is essential, as it may provide the benefits of reducing stomatal opening and transpiration and controlling the release of tonoplast-localized anion transporter, thus resulting in increased water-use efficiency and drought tolerance. We summarized a number of scientific reports on the role and mechanism of GABA-induced drought tolerance in plants. We also discussed existing insights regarding GABA’s metabolic and signaling functions used to increase plant tolerance to drought stress.

scholarly journals Increasing Water Use Efficiency in Vegetable Crop Production: From Plant to Irrigation Systems Efficiency

2011 ◽  
Vol 21 (3) ◽  
pp. 301-308 ◽  
Author(s):  
Stefania De Pascale ◽  
Luisa Dalla Costa ◽  
Simona Vallone ◽  
Giancarlo Barbieri ◽  
Albino Maggio
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Crop Production ◽  
Crop Growth ◽  
Climatic Conditions ◽  
Fine Tuning ◽  
Agricultural Water ◽  
Vegetable Crop ◽  
Local Soil ◽  
Use Efficiency

Irrigation is a vital component of the world agriculture. It is practiced worldwide on ≈270 million hectares and it consents to produce 40% of our total food. Agricultural water consumption accounts for 70% of total freshwater use. The competition for this precious resource is increasing tremendously. Therefore, it is becoming critically important to optimize agricultural water use efficiency (WUE) defined as the ratio of crop yield over the applied water. This requires a shift from maximizing productivity per unit of land area to maximizing productivity per unit of water consumed. To maximize WUE it is necessary to conserve water and to promote maximal crop growth. The former requires minimizing losses through runoff, seepage, evaporation, and transpiration by weeds. The latter objective may be accomplished by planting high-yielding crops/cultivars well adapted to local soil and climatic conditions. Optimizing growing conditions by proper timing of planting and harvesting, tillage, fertilization, and pest control also contribute to improve crop growth. Most of these techniques refer to proven technology, whose implementation and/or fine-tuning in current farming systems may tremendously improve water management efficiency. In this paper, after discussing the importance of irrigation in agriculture, we will introduce basic concepts that define crop WUE and will finally review the means to improve irrigation efficiency in field vegetable crop production.

scholarly journals Guard-Cell Hexokinase Increases Water-Use Efficiency Under Normal and Drought Conditions

2019 ◽  
Vol 10 ◽  
Author(s):  
Gilor Kelly ◽  
Aiman Egbaria ◽  
Belal Khamaisi ◽  
Nitsan Lugassi ◽  
Ziv Attia ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Guard Cell ◽  
Drought Conditions ◽  
Use Efficiency

scholarly journals Molecular plasticity to soil water deficit differs between sessile oak (Quercus Petraea (Matt.) Liebl.) high and low water use efficiency genotypes

2021 ◽  
Author(s):  
Gregoire LE PROVOST ◽  
Theo Gerardin ◽  
Christophe Plomion ◽  
Oliver Brendel
Keyword(s):  
Water Use Efficiency ◽  
Soil Water ◽  
Water Deficit ◽  
Water Use ◽  
Transpiration Rate ◽  
Tree Species ◽  
Fine Tuning ◽  
Soil Water Deficit ◽  
Sessile Oak ◽  
Use Efficiency

Background: Water use efficiency (WUE) is an important adaptive trait for soil water deficit. The molecular and physiological bases of WUE regulation in crops have been studied in detail in the context of plant breeding. Knowledge for most forest tree species lags behind, despite the need to identify populations or genotypes able to cope with the longer, more intense drought periods likely to result from climate warming. Results: We aimed to bridge this gap in knowledge for sessile oak (Quercus Petraeae Matt. L.), one of the most ecologically and economically important tree species in Europe, using a factorial design including two genotypes (low and high WUE) and two watering regimes (control and drought). By monitoring the ecophysiological response, we were able to identify groups of genotypes with high and low WUE. We then performed RNA-seq to quantify gene expression for the most extreme genotypes exposed to two watering regimes. By analyzing the interaction term, we were able to capture the molecular strategy of each group of plants for coping with drought. Regardless of water availability, the high WUE genotypes overexpressed genes associated with drought responses, and the control of stomatal density and distribution, and displayed a downregulation of genes associated with early stomatal closure and high transpiration rate. High-WUE genotypes, thus, coped with drought by fine-tuning the expression of genes with known functions in the regulation of stomatal size, density, movement or aperture and transpiration rate. Conclusion: Fine physiological screening of sessile oaks with contrasting WUE, and their molecular characterization i) highlighted subtle differences in transcription between low and high WUE genotypes, identifying key molecular players in the genetic control of this trait, and ii) revealed the genes underlying the molecular strategy that had evolved in each group to cope with water deficit, providing new insight into the value of WUE for adaptation to drought.

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