Breeding crop plants for drought tolerance

Wimalasekera, Rinukshi

doi:10.1002/9781119054450.ch31

Cited by 3 publications

(5 citation statements)

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“…Plant breeding approaches consist of development of QTLs (quantitative trait loci), specific marker‐assisted intermittent assortment, and genome selection (Fletcher et al 2015; Kumar et al 2014). Employment of genetic transformation and genetic engineering approaches in modern plant breeding strategies has massively improved the tolerance and resistance of plants to drought conditions (Wimalasekera 2016). Present acquaintance with the molecular and physiological behavior of plants in response to water deficit conditions is thus imperative for implementing breeding and other techniques for development of drought tolerant plants.…”

Section: Strategies To Combat Water Deficit Stressmentioning

confidence: 99%

“…For development of specific breeding strategies, insightful awareness regarding plants interaction with environment, physiological responses, and genotype is a prerequisite (Tardieu & Tuberosa 2010; Trethowan 2014). Several strategies such as molecular marker‐assisted selection associated with gene‐pyramiding and conventional breeding techniques are engaged in breeding agendas in development of water deficit resistant plant species (Wimalasekera 2016). In a broad aspect, plant breeding is defined as the focused exploitation and manipulation of the plant species as to get preferred phenotypic and genotypic characters for a specific rationale.…”

Section: Strategies To Combat Water Deficit Stressmentioning

confidence: 99%

“…A wide range of breeding approaches for development of drought tolerant rice variety has employed grain yield as the selected feature. More recently, crosses are done between the prebreeding lines of drought resistant plant varieties that yield a progeny with comparatively higher drought resistance than parents (Wimalasekera 2016).…”

Section: Strategies To Combat Water Deficit Stressmentioning

confidence: 99%

“…Novel advances and evolution of genetic transformation in chief crop plants has been of huge importance for exploitation of significant crop plants and development of water deficit resistant varieties (Wimalasekera 2016). Transgenic strategies have been proven to be advantageous in acquiring proof‐of‐concept studies in further understanding the molecular mechanisms forming the principals of water deficit tolerance (Cominelli et al 2013).…”

Section: Strategies To Combat Water Deficit Stressmentioning

confidence: 99%

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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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Section: Strategies To Combat Water Deficit Stressmentioning

confidence: 99%

Section: Strategies To Combat Water Deficit Stressmentioning

confidence: 99%

Section: Strategies To Combat Water Deficit Stressmentioning

confidence: 99%

Section: Strategies To Combat Water Deficit Stressmentioning

confidence: 99%

See 2 more Smart Citations

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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show abstract

“…A plant's ability to survive better and minimize the yield losses due to deficiency of water in the soil is known as drought resistance (Wimalasekera, 2016). More than a few morphological, physiological and molecular responses are encouraged in plants which empower them to better survive under such critical stress conditions (Iqbal et al, 2013).…”

Section: Drought Tolerance 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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