Hormonal regulation of drought stress in plants

Kaur, Ravdeep; Bhardwaj, Renu; Sharma, Resham; Kohli, Sukhmeen Kaur; Kumar, Vinod; Kaur, Parminder

doi:10.1002/9781119054450.ch33

Cited by 8 publications

(4 citation statements)

References 164 publications

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“…To withstand drought conditions, plants can adopt a variety of strategies that involve morphological, physiological and biochemical responses, with considerable diversity observed among or even within crop species ( Farooq et al, 2012 ). Important plant responses to drought are changes in stomatal regulation ( Pirasteh-Anosheh et al, 2016 ), changes in the root system ( Ye et al, 2018 ), hormonal changes ( Kaur et al, 2016 ), activation of antioxidant defense systems ( Sun et al, 2020 ) or osmotic adjustments ( Turner, 2018 ). The nature and the magnitude of the crop responses to drought also depends on the duration (and the intensity) of the stress.…”

Section: Introductionmentioning

confidence: 99%

Response of a Diverse European Soybean Collection to “Short Duration” and “Long Duration” Drought Stress

Saleem

Aper²,

Muylle³

et al. 2022

Front. Plant Sci.

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Drought causes significant damage to a high value crop of soybean. Europe has an increasing demand for soybean and its own production is insufficient. Selection and breeding of cultivars adapted to European growth conditions is therefore urgently needed. These new cultivars must have a shorter growing cycle (specifically for adaptation to North-West Europe), high yield potential under European growing conditions, and sufficient drought resistance. We have evaluated the performance of a diverse collection of 359 soybean accessions under drought stress using rain-out shelters for 2 years. The contrasting weather conditions between years and correspondingly the varying plant responses demonstrated that the consequences of drought for an individual accession can vary strongly depending on the characteristics (e.g., duration and intensity) of the drought period. Short duration drought stress, for a period of four to 7 weeks, caused an average reduction of 11% in maximum canopy height (CH), a reduction of 17% in seed number per plant (SN) and a reduction of 16% in seed weight per plant (SW). Long duration drought stress caused an average reduction of 29% in CH, a reduction of 38% in SN and a reduction of 43% in SW. Drought accelerated plant development and caused an earlier cessation of flowering and pod formation. This seemed to help some accessions to better protect the seed yield, under short duration drought stress. Drought resistance for yield-related traits was associated with the maintenance of growth under long duration drought stress. The collection displayed a broad range of variation for canopy wilting and leaf senescence but a very narrow range of variation for crop water stress index (CWSI; derived from canopy temperature data). To the best of our knowledge this is the first study reporting a detailed investigation of the response to drought within a diverse soybean collection relevant for breeding in Europe.

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Section: Introductionmentioning

confidence: 99%

Response of a Diverse European Soybean Collection to “Short Duration” and “Long Duration” Drought Stress

Saleem

Aper²,

Muylle³

et al. 2022

Front. Plant Sci.

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“…On drought exposure, ABA is readily synthesized in plant roots and translocated to the shoots, mainly the leaves (Salehi‐Lisar & Bakhshayeshan‐Agdam 2016). Expression of various genes involved in ABA synthesis such as zeaxanthin epoxidase ( ZEP ), aldehyde oxidase ( AAO3 ), 9‐cis‐epoxycarotenoid dioxygenase3 ( NCED3 ), and molybdenum cofactor sulfurase gene ( MCSU ) are upregulated during stress (Feki & Brini 2016; Kaur et al 2016; Shomali & Aliniaeifard 2020) leading to ABA synthesis and accumulation. The accumulated ABA further activates signaling pathways involved in imparting tolerance during drought stress (Todaka et al 2019).…”

Section: Transcriptional Regulation and Signaling Under Water Deficit Stressmentioning

confidence: 99%

Scrutinizing the impact of water deficit in plants: Transcriptional regulation, signaling, photosynthetic efficacy, and management

Kaur

Kohli

Khanna

et al. 2021

Physiologia Plantarum

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Suboptimal availability of water limits plant growth, development, and performance.Drought is one of the leading factors responsible for worldwide crop yield reduction. In the future, owing to climate changes, more agricultural land will be affected by prolonged periods of water deficit. Thus, understanding the fundamental mechanism of drought response is a major scientific concern for improvement of crop production. To combat drought stress, plants deploy varied mechanistic strategies and alter their morphological, physiochemical, and molecular attributes. This helps plant to enhance water uptake and storage, reduce water loss and avoid wilting. Induction of several transcription factors and drought responsive genes leads to synthesis of stress proteins, regulation of water channels i.e. aquaporins and production of osmolytes that are essential for maintenance of osmotic balance at the cellular level. Self-and hormone-regulated signaling pathways are often stimulated by plants after receiving drought stress signals via secondary messengers, mitogen-activated protein kinases, and stress hormones. These signaling cascades often leads to stomatal closure and reduction in transpiration rates. Reduced carbon dioxide diffusion in chloroplast, lowered efficacy of photosystems, and other metabolic constraints limits the key regulatory photosynthetic process during water deficit. The impact of these stomatal and nonstomatal limitations varies with stress intensity, superimposed stresses and plant species. A clear understanding of the drought resistance process is thus important before adopting strategies for imparting drought tolerance in plants. These management practices at present include exogenous hormone application, breeding, and genetic engineering techniques for combating the water deficit issues.

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“…In general, plant response to water deficit and accompanying osmotic stress result in drought resistance, which can be achieved via three principal strategies—(i) drought escape, (ii) drought avoidance, and (iii) drought tolerance [ 6 ]. Thereby, at the early steps, dehydration triggers stomata closure, which is regulated by abscisic acid (ABA)-dependent signaling pathways [ 7 ]. It results in an overload of chloroplast and mitochondrial electron transport chains, and overproduction of reactive oxygen and nitrogen species (ROS and RNS, respectively) [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Reactive Carbonyl Species in Pea Root Nodules in Response to Polyethylene Glycol (PEG)-Induced Osmotic Stress

Soboleva

Frolova

Bureiko

et al. 2022

IJMS

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Drought dramatically affects crop productivity worldwide. For legumes this effect is especially pronounced, as their symbiotic association with rhizobia is highly-sensitive to dehydration. This might be attributed to the oxidative stress, which ultimately accompanies plants’ response to water deficit. Indeed, enhanced formation of reactive oxygen species in root nodules might result in up-regulation of lipid peroxidation and overproduction of reactive carbonyl compounds (RCCs), which readily modify biomolecules and disrupt cell functions. Thus, the knowledge of the nodule carbonyl metabolome dynamics is critically important for understanding the drought-related losses of nitrogen fixation efficiency and plant productivity. Therefore, here we provide, to the best of our knowledge, for the first time a comprehensive overview of the pea root nodule carbonyl metabolome and address its alterations in response to polyethylene glycol-induced osmotic stress as the first step to examine the changes of RCC patterns in drought treated plants. RCCs were extracted from the nodules and derivatized with 7-(diethylamino)coumarin-3-carbohydrazide (CHH). The relative quantification of CHH-derivatives by liquid chromatography-high resolution mass spectrometry with a post-run correction for derivative stability revealed in total 194 features with intensities above 1 × 105 counts, 19 of which were down- and three were upregulated. The upregulation of glyceraldehyde could accompany non-enzymatic conversion of glyceraldehyde-3-phosphate to methylglyoxal. The accumulation of 4,5-dioxovaleric acid could be the reason for down-regulation of porphyrin metabolism, suppression of leghemoglobin synthesis, inhibition of nitrogenase and degradation of legume-rhizobial symbiosis in response to polyethylene glycol (PEG)-induced osmotic stress effect. This effect needs to be confirmed with soil-based drought models.

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Hormonal regulation of drought stress in plants

Cited by 8 publications

References 164 publications

Response of a Diverse European Soybean Collection to “Short Duration” and “Long Duration” Drought Stress

Response of a Diverse European Soybean Collection to “Short Duration” and “Long Duration” Drought Stress

Scrutinizing the impact of water deficit in plants: Transcriptional regulation, signaling, photosynthetic efficacy, and management

Dynamics of Reactive Carbonyl Species in Pea Root Nodules in Response to Polyethylene Glycol (PEG)-Induced Osmotic Stress

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