Responses to Increased Moisture Stress and Extremes: Whole Plant Response to Drought under Climate Change

Vadez, Vincent; Kholová, Jana; Choudhary, Sunita; Zindy, Paul; Terrier, Médulline; Krishnamurthy, L.; Ratnakumar, P.; Turner, Neil C.

doi:10.1002/9780470960929.ch14

Cited by 22 publications

(17 citation statements)

References 55 publications

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“…This exemplifies AVRDC's long-held position of making a substantial investment in research to address abiotic constraints to vegetable production, including the introgression of heat, drought and salt tolerance genes from wild tomato species ( Solanum pimpinellifolium, Solanum chilense, Solanum peruvianum and Solanum habrochites ) into cultivated types ( Solanum lycopersicum ) for the industrial and fresh markets. The research clearly will need to be accelerated in this decade with the International Center for Biosaline Agriculture (ICBA) and ICRISAT (Vadez et al 2011) as partners if it is to keep pace with the changing climate. In addition, crop management technologies must advance and be adapted to meet the growing challenges of abiotic stress.…”

Section: Discussionmentioning

confidence: 99%

“…Vegetables are high-value crops with global importance for the alleviation of poverty and malnutrition and for the attainment and maintenance of good health in humans (Keatinge et al 2011 a ). Efforts to provide genetic adjustment to warming and other abiotic stresses in vegetables have been summarized by de la Peña et al (2011) and more specifically for solanaceous vegetables by Hanson et al (2011): both papers state that the adaptation of vegetable crops to climate uncertainty is quite possible using modern agricultural science, but that knowledge of crop–climate interactions remains fragmentary (Vadez et al 2011). The present paper contributes to the pool of knowledge and recommendations to better quantify the challenges facing vegetable breeders and associated scientists.…”

Section: Introductionmentioning

confidence: 99%

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Projecting annual air temperature changes to 2025 and beyond: implications for vegetable production worldwide

Keatinge

Ledesma

Keatinge³

et al. 2012

J. Agric. Sci.

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SUMMARYData sets were accumulated of annual average maximum, minimum and mean air temperature from a range of sites worldwide, specifically from non-urban locations such as agricultural research institutes, universities and other rural or island locations for the period 1975–2011 or longer where data were available. The data sets were then analysed using linear regression to determine the rate and direction of change in temperature over the reference periods. This analysis was performed to provide vegetable scientists with likely future temperature change scenarios up to 2025 and 2050 (on the assumption that recent trends are maintained) so that breeding, agronomic and other related research programmes may better respond to potential challenges from abiotic and biotic stresses to vegetable production. Substantial variation was evident between sites and between time runs at specific sites. At some locations rapid increases in air temperature are projected, such as for sites in East Asia, but at other locations little change is evident; in rare cases, local cooling is shown. The implications of variability and change in air temperature in the context of constraints to vegetable production and the opportunities to exploit the range of genetic diversity available in climatically uncertain environments are discussed. It is believed that modern agricultural science can address successfully the problems raised by climate uncertainty, yet the lack of sufficient, immediate investment in horticultural disciplines worldwide places the world at severe risk of failing to attain effective food and nutritional security.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Projecting annual air temperature changes to 2025 and beyond: implications for vegetable production worldwide

Keatinge

Ledesma

Keatinge³

et al. 2012

J. Agric. Sci.

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show abstract

“…Dramatic changes in rainfall frequency, intensity, duration, and distribution have also been forecast at regional scale (Kao and Ganguly, 2011). This combination of events could significantly modify the levels of heat and drought stresses negatively impacting growth, development, and productivity of cultivated plants (Trenberth, 2011; Vadez et al, 2011). …”

Section: Introductionmentioning

confidence: 99%

Drought and Heat Differentially Affect XTH Expression and XET Activity and Action in 3-Day-Old Seedlings of Durum Wheat Cultivars with Different Stress Susceptibility

et al. 2016

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Heat and drought stress have emerged as major constraints for durum wheat production. In the Mediterranean area, their negative effect on crop productivity is expected to be exacerbated by the occurring climate change. Xyloglucan endotransglucosylase/hydrolases (XTHs) are chief enzymes in cell wall remodeling, whose relevance in cell expansion and morphogenesis suggests a central role in stress responses. In this work the potential role of XTHs in abiotic stress tolerance was investigated in durum wheat. The separate effects of dehydration and heat exposure on XTH expression and its endotransglucosylase (XET) in vitro activity and in vivo action have been monitored, up to 24 h, in the apical and sub-apical root regions and shoots excised from 3-day-old seedlings of durum wheat cultivars differing in stress susceptibility/tolerance. Dehydration and heat stress differentially influence the XTH expression profiles and the activity and action of XET in the wheat seedlings, depending on the degree of susceptibility/tolerance of the cultivars, the organ, the topological region of the root and, within the root, on the gradient of cell differentiation. The root apical region was the zone mainly affected by both treatments in all assayed cultivars, while no change in XET activity was observed at shoot level, irrespective of susceptibility/tolerance, confirming the pivotal role of the root in stress perception, signaling, and response. Conflicting effects were observed depending on stress type: dehydration evoked an overall increase, at least in the apical region of the root, of XET activity and action, while a significant inhibition was caused by heat treatment in most cultivars. The data suggest that differential changes in XET action in defined portions of the root of young durum wheat seedlings may have a role as a response to drought and heat stress, thus contributing to seedling survival and crop establishment. A thorough understanding of the mechanisms underlying these variations could represent the theoretical basis for implementing breeding strategies to develop new highly productive hybrids adapted to future climate scenarios.

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“…Drought tolerance refers to plants' predisposition to survive and resist water deficiency below field capacity of soil by protoplasmic tolerance, de novo synthesis of osmolytes and/or compatible solutes. 10,11 Both drought avoidance and drought tolerance traits in crops have a significant positive impact on agricultural production. Unlike, tolerance to biotic stresses which are mostly governed by monogenic traits, abiotic stresses are predominantly controlled by polygenic traits and hence are complex to study and more challenging to develop a comprehensive understanding of the underpinning processes.…”

Section: Introductionmentioning

confidence: 99%

Genome-wide analysis of drought induced gene expression changes in flax (Linum usitatissimum)

et al. 2014

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Responses to Increased Moisture Stress and Extremes: Whole Plant Response to Drought under Climate Change

Cited by 22 publications

References 55 publications

Projecting annual air temperature changes to 2025 and beyond: implications for vegetable production worldwide

Projecting annual air temperature changes to 2025 and beyond: implications for vegetable production worldwide

Drought and Heat Differentially Affect XTH Expression and XET Activity and Action in 3-Day-Old Seedlings of Durum Wheat Cultivars with Different Stress Susceptibility

Genome-wide analysis of drought induced gene expression changes in flax (Linum usitatissimum)

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