Water stress in plants

Rejeb, Kilani Ben; Benzarti, Maâli; Debez, Ahmed; Savouré, Arnould; Abdelly, Chédly

doi:10.1002/9781119054450.ch10

Cited by 3 publications

(5 citation statements)

References 88 publications

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“…Plants have evolutionarily developed a variety of signaling networks to adapt to various stresses through morphological, physiological, and metabolic changes (Rejeb et al, 2016 ). It is a well-known scenario that during stress, proteins on membranes act as receptors, and sensors in transducing the information to their target proteins in the cytoplasm via processes such as phosphorylation.…”

Section: Translational Activities To Improve Drought Adaptation In Crmentioning

confidence: 99%

“…Major signaling factors involved in drought mitigation belong to the families of mitogen activated proteins kinases (MAPKs), Ca 2+ sensing calcium-dependent protein kinases (CDPKs), and signal transduction systems involved in phospholipid metabolism. Several over-expression studies in economically important crops have demonstrated the usefulness of these genes in extenuating drought stress (Rejeb et al, 2016 ). The plants with ectopic expression of these factors not only showed improved drought tolerance but also improved seed germination and anti-oxidant capacity under drought.…”

Section: Translational Activities To Improve Drought Adaptation In Crmentioning

confidence: 99%

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Introgression of Physiological Traits for a Comprehensive Improvement of Drought Adaptation in Crop Plants

et al. 2018

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Burgeoning population growth, industrial demand, and the predicted global climate change resulting in erratic monsoon rains are expected to severely limit fresh water availability for agriculture both in irrigated and rainfed ecosystems. In order to remain food and nutrient secure, agriculture research needs to focus on devising strategies to save water in irrigated conditions and to develop superior cultivars with improved water productivity to sustain yield under rainfed conditions. Recent opinions accruing in the scientific literature strongly favor the adoption of a “trait based” crop improvement approach for increasing water productivity. Traits associated with maintenance of positive tissue turgor and maintenance of increased carbon assimilation are regarded as most relevant to improve crop growth rates under water limiting conditions and to enhance water productivity. The advent of several water saving agronomic practices notwithstanding, a genetic enhancement strategy of introgressing distinct physiological, morphological, and cellular mechanisms on to a single elite genetic background is essential for achieving a comprehensive improvement in drought adaptation in crop plants. The significant progress made in genomics, though would provide the necessary impetus, a clear understanding of the “traits” to be introgressed is the most essential need of the hour. Water uptake by a better root architecture, water conservation by preventing unproductive transpiration are crucial for maintaining positive tissue water relations. Improved carbon assimilation associated with carboxylation capacity and mesophyll conductance is important in sustaining crop growth rates under water limited conditions. Besides these major traits, we summarize the available information in literature on classifying various drought adaptive traits. We provide evidences that Water-Use Efficiency when introgressed with moderately higher transpiration, would significantly enhance growth rates and water productivity in rice through an improved photosynthetic capacity.

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Section: Translational Activities To Improve Drought Adaptation In Crmentioning

confidence: 99%

Section: Translational Activities To Improve Drought Adaptation In Crmentioning

confidence: 99%

Introgression of Physiological Traits for a Comprehensive Improvement of Drought Adaptation in Crop Plants

et al. 2018

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“…Plant) with application of simple organic-originated biochar when compared to 4). Salinity stress causes stomatal closure in the shoot of plants which leads to burst production of ROS under high Na + concentration (Rejeb et al, 2015). Thus, oxidative damage induced in plants by the Mehler reaction (PSI), production of singlet oxygen (PSII) in the thylakoid membrane, and H 2 O 2 production due to the inhibition of water splitting manganese-complex which allow more electrons to leak from PSI-II resulting high rates of CMP (Lee et al, 2013).…”

Section: Influence Of Sbc and Mecbs On Fresh Weight Photosynthetic Ap...mentioning

confidence: 99%

Enhancing the wheat growth through micronutrients enriched biochar under salt stress

Mukhtar

Khan

et al. 2023

Front. Sustain. Food Syst.

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Crop irrigation with brackish water having high Na+ is a common practice in developing countries like Pakistan; hence increasing the saline-sodic soils throughout the region. Therefore, two independent studies were conducted to evaluate the impact of minerals enriched contrasting biochars (MECBs) in mitigating Na+ toxicity on soil physicochemical properties, wheat growth, and physiology. In 1st trial, an incubation experiment was conducted having 32 treatments including simple biochar (SBc), manganese enriched biochar (MnBc), zinc enriched biochar (ZnBc), and iron enriched biochar (FeBc) applied at two rates (0.1% and 0.5%) with four different salinity levels such as 10, 20, 30, and 40 dSm−1. The soil was sampled after the 8th, 16th, and 24th day of incubation. Among the four sources of biochar, MnBc (0.1%) + 40 dSm−1 and FeBc (0.5%) + 40 dSm−1 showed efficient results to tolerate salinity stress in soil by efficiently reducing the availability of Na+ (60% and 30%) when compared to SBc (0.5%) + 40 dSm−1. Then, a pot study was conducted with 20 different treatments (control, SBc, MnBc, ZnBc, and FeBc) at four different salinity levels, i.e., 0, 5, 10, and 15 dSm−1. There were four replicates and the crop was harvested after 60 days of germination. The application of brackish water (control+15 dSm−1) significantly reduced the fresh weight of root (28%) and shoot (34%) of wheat (Triticum aestivum L.) as compared to FeBc+15 dSm−1. However, the soil Na+ toxicity was significantly decreased (23%) by the application of FeBc+15 dSm−1 as compared to control+15 dSm−1. Similarly, a significant increase was observed in leaf chl. a, b and photosynthetic rate (75%, 3 and 2-folds); however, a significant decrease was observed in transpiration rate (50%) in T. aestivum L. treated with FeBc+15 dSm−1 as compared to control+15 dSm−1. Interestingly, FeBc+15 dSm−1 also played a vital role to prevent oxidative damage by controlling the shoot CMP (63%) in T. aestivum L. by efficiently triggering the activities of shoot antioxidant enzymes such as APX (30%) and CAT (52%) when compared to control+15 dSm−1. In summary, it was evaluated that FeBc showed the highest adsorption capacity of Na+ ions to regulate salinity stress by improving soil health and crop physiology.

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“…The consequences of water stress are inhibition of plant growth, stomatal closure with diminished transpiration rate, lower chlorophyll contents and inhibition of photosynthesis. Thus water stress is said to be the major limiting factor to reduce the seed cotton yield around the globe (Anjum et al, 2011;Rejeb et al, 2016).…”

Section: Water Stress and Cotton Plantmentioning

confidence: 99%

“…Plants cut down their water spending under water stress conditions by decreasing number and area of leaves to minimize the yield losses (Homdee et al, 2016). Root growth, size, density and proliferation showed strategic response towards the water stress because obtaining water from the soil is get aceived through the root (Kavar et al, 2008;Rejeb et al, 2016).…”

Section: Morphological Mechanismmentioning

confidence: 99%

Effects of Water Stress on Cotton (Gossypium spp.) Plants and Productivity

Rehman

Bakhsh

Zubair³

et al. 2021

Egypt. J. Agron.

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Egyptian Journal of Agronomy http://agro.journals.ekb.eg/ Review 20T HE WATER stress harshly influences the plant growth and development with considerable reductions in plant growth and biomass accumulates. It declines the number of bolls per plant, bolls weight, and seed cotton (Gossypium spp.) yield. Fiber length, fiber strength, seed index and boll weight are reduced dynamically. The relative leaf water contents, transpiration rate and leaf water potential are decreased while leaf and canopy temperature is increased under water stress conditions. Limited water availability restricts the total uptake of nutrients, thus deprecating their concentration in the plant tissues. The major effects of water stress on the plants are lowered photosynthesis stimulated by reduced leaf expansion, early leaf senescence, deteriorated photosynthetic machinery and reduction in food production.The Plant accomplishes escape from moisture stress by shortening its growing season which results in a reduction in yield. The plants cut down their water spending under water stress conditions by dercreasing the number and area of leaves to minimize the yield losses. The growth and development of tolerant genotypes are relatively fast because of retention of more moisture from soil earlier. Genes are induced by water stress, categorized into regulatory and functional genes; from them, functional genes produce functional proteins, whereas regulatory genes product regulatory proteins like transcriptional factors, they control a cluster of genes by regulating the expression of different targeted genes in their promoter region through specific binding of it with cis-acting elements. The development of stress-tolerant cotton varieties based on the stability of yield and yield components under water stress conditions should be the prime focus of breeders.

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Water stress in plants

Cited by 3 publications

References 88 publications

Introgression of Physiological Traits for a Comprehensive Improvement of Drought Adaptation in Crop Plants

Introgression of Physiological Traits for a Comprehensive Improvement of Drought Adaptation in Crop Plants

Enhancing the wheat growth through micronutrients enriched biochar under salt stress

Effects of Water Stress on Cotton (Gossypium spp.) Plants and Productivity

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