Effect of terminal water stress on leaf epicuticular wax load, residual transpiration and grain yield in barley

González, Á.; Ayerbe, L.

doi:10.1007/s10681-009-0027-0

Cited by 94 publications

(70 citation statements)

References 44 publications

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“…The influence of loci previously identified for flag leaf glaucousness Previous reports on the effects of flag leaf glaucousness on cereal grain yield (Gonzalez and Ayerbe 2010;Johnson et al 1983;Richards et al 1986) and the large level of variation for this trait in the DH population (Bennett et al 2011) suggested that leaf glaucousness could be having a large effect on grain yield in the present study. QW.aww-3A accounted for a large percentage of variation for glaucousness, but in the present study, failed to exert influence on any other traits to a level where even a suggestive QTL could be detected.…”

Section: Discussionmentioning

confidence: 51%

Genetic dissection of grain yield and physical grain quality in bread wheat (Triticum aestivum L.) under water-limited environments

et al. 2012

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In the water-limited bread wheat production environment of southern Australia, large advances in grain yield have previously been achieved through the introduction and improved understanding of agronomic traits controlled by major genes, such as the semi-dwarf plant stature and photoperiod insensitivity. However, more recent yield increases have been achieved through incremental genetic advances, of which, breeders and researchers do not fully understand the underlying mechanism(s). A doubled haploid population was utilised, derived from a cross between RAC875, a relatively drought-tolerant breeders' line and Kukri, a locally adapted variety more intolerant of drought. Experiments were performed in 16 environments over four seasons in southern Australia, to physiologically dissect grain yield and to detect quantitative trait loci (QTL) for these traits. Two stage multi-environment trial analysis identified three main clusters of experiments (forming distinctive environments, ENVs), each with a distinctive growing season rainfall patterns. Kernels per square metre were positively correlated with grain yield and influenced by kernels per spikelet, a measure of fertility. QTL analysis detected nine loci for grain yield across these ENVs, individually accounting for between 3 and 18% of genetic variance within their respective ENVs, with the RAC875 allele conferring increased grain yield at seven of these loci. These loci were partially dissected by the detection of co-located QTL for other traits, namely kernels per square metre. While most loci for grain yield have previously been reported, their deployment and effect within local germplasm are now better understood. A number of novel loci can be further exploited to aid breeders' efforts in improving grain yield in the southern Australian environment.

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Section: Discussionmentioning

confidence: 51%

Genetic dissection of grain yield and physical grain quality in bread wheat (Triticum aestivum L.) under water-limited environments

et al. 2012

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“…The significance of residual transpiration (RT) with respect to yield is more controversial. González and Ayerbe (2010) found a negative correlation between RT and yield, which emphasizes the importance of water permeance of the cuticle under water stress. Other studies, however, have come to a different conclusion (Clarke et al, 1991).…”

Section: Discussionmentioning

confidence: 82%

“…Dark-adapted water loss has often been used as an indicator of residual transpiration (e.g. Kosma et al, 2009;González and Ayerbe, 2010), although incomplete closure of stomata in the dark may obviously have the potential to distort results. Applying this method to flag leaves of the selected wheat cultivars, a higher water loss rate of Cappelle Desprez was observed in comparison with the other cultivars (Fig.…”

Section: Discussionmentioning

confidence: 99%

A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress

Jäger

Fábián

Eitel

et al. 2014

Journal of Plant Physiology

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Leaf micromorphological traits and some physiological parameters with potential relevance to drought tolerance mechanisms were investigated in four selected winter wheat varieties. Plants were subjected to two cycles of drought treatment at anthesis. Yield components confirmed contrasting drought-sensitive and -tolerant behavior of the genotypes. Drought tolerance was associated with small flag leaf surfaces and less frequent occurrence of stomata. Substantial variation of leaf cuticular thickness was found among the cultivars. Thin cuticle coincided with drought sensitivity and correlated with a high rate of darkadapted water loss from leaves. Unlike in Arabidopsis, thickening of the cuticular matrix in response to water deprivation did not occur. Water stress induced epicuticular wax crystal depositions preferentially on the abaxial leaf surfaces. According to microscopy and electrolyte leakage measurements from leaf tissues, membrane integrity was lost earlier or to a higher extent in sensitive than in tolerant genotypes. Cellular damage and a decline of relative water content of leaves in sensitive cultivars became distinctive during the second cycle of water deprivation. Our results indicate strong variation of traits with potential contribution to the complex phenotype of drought tolerance in wheat genotypes. The maintained membrane integrity and relative water content values during repeated water limited periods were found to correlate with drought tolerance in the selection of cultivars investigated.

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“…A mutant of wild barley, eibi1, with a very thin cutin layer, was hypersensitive to drought [83]. Breeding for improved WUE, tolerance and yield under water deficit conditions led to increased amounts of cuticle waxes, further confirming the link between drought tolerance and cuticle properties [84]. Thus, the increased biosynthesis of cuticle waxes seems to be an established plant response to dry conditions.…”

Section: Controlling Water Loss Through the Cuticlementioning

confidence: 88%

Improving Plant Water Use Efficiency through Molecular Genetics

et al. 2017

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Improving crop performance under water-limiting conditions is essential for achieving environmentally sustainable food production. This requires significant progress in both the identification and characterization of key genetic and physiological processes involved in water uptake and loss. Plants regulate water uptake and loss through both developmental and environmental responses. These responses include: root morphology and architecture, cuticle development, stomatal development, and guard cell movements in response to the environment. Genes controlling root traits and stomatal development and guard cell movements strongly impact water use efficiency (WUE), and represent the best targets for molecular breeding programs. This article provides an overview of the complex networks of genes involved in water uptake and loss. These traits represent novel opportunities and strategies for genetic improvement of WUE and drought tolerance in crops.

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Effect of terminal water stress on leaf epicuticular wax load, residual transpiration and grain yield in barley

Cited by 94 publications

References 44 publications

Genetic dissection of grain yield and physical grain quality in bread wheat (Triticum aestivum L.) under water-limited environments

Genetic dissection of grain yield and physical grain quality in bread wheat (Triticum aestivum L.) under water-limited environments

A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress

Improving Plant Water Use Efficiency through Molecular Genetics

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