Interactive effects of high temperature and drought stress during stem elongation, anthesis and early grain filling on the yield formation and photosynthesis of winter wheat

Hlaváčová, Marcela; Klem, Karel; Rapantová, Barbora; Novotná, Kateřina; Urban, Otmar; Hlavinka, Petr; Smutná, Pavlína; Horáková, Vladimíra; Škarpa, Petr; Pohanková, Eva; Wimmerová, Markéta; Orság, Matěj; Jurečka, František; Trnka, Miroslav

doi:10.1016/j.fcr.2018.02.022

Cited by 112 publications

(63 citation statements)

References 69 publications

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“…This is because contemporary changes of the vegetation cover can be observed in many ecosystems worldwide because of fragmentation [ 49 ] and land-use changes [ 50 ]. Plant vegetative architecture and photosynthetic related traits also play a key role in the evolution, adaptation, and plasticity of crop plants (crop breeding and domestication [ 51 , 52 , 53 , 54 ]). We therefore call for more work on the potential epigenetic variation associated with the phenotypic plasticity of plants in response to shade because it would improve our understanding of the potential ecological and evolutionary significance of epigenetic variation in natural populations.…”

Section: Discussionmentioning

confidence: 99%

Phenotypic Response to Light Versus Shade Associated with DNA Methylation Changes in Snapdragon Plants (Antirrhinum majus)

Mouginot

Aparicio

Gourcilleau

et al. 2021

Genes

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The phenotypic plasticity of plants in response to change in their light environment, and in particularly, to shade is a schoolbook example of ecologically relevant phenotypic plasticity with evolutionary adaptive implications. Epigenetic variation is known to potentially underlie plant phenotypic plasticity. Yet, little is known about its role in ecologically and evolutionary relevant mechanisms shaping the diversity of plant populations in nature. Here we used a reference-free reduced representation bisulfite sequencing method for non-model organisms (epiGBS) to investigate changes in DNA methylation patterns across the genome in snapdragon plants (Antirrhinum majus L.). We exposed plants to sunlight versus artificially induced shade in four highly inbred lines to exclude genetic confounding effects. Our results showed that phenotypic plasticity in response to light versus shade shaped vegetative traits. They also showed that DNA methylation patterns were modified under light versus shade, with a trend towards global effects over the genome but with large effects found on a restricted portion. We also detected the existence of a correlation between phenotypic and epigenetic variation that neither supported nor rejected its potential role in plasticity. While our findings imply epigenetic changes in response to light versus shade environments in snapdragon plants, whether these changes are directly involved in the phenotypic plastic response of plants remains to be investigated. Our approach contributed to this new finding but illustrates the limits in terms of sample size and statistical power of population epigenetic approaches in non-model organisms. Pushing this boundary will be necessary before the relationship between environmentally induced epigenetic changes and phenotypic plasticity is clarified for ecologically relevant mechanisms with evolutionary implications.

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Section: Discussionmentioning

confidence: 99%

Phenotypic Response to Light Versus Shade Associated with DNA Methylation Changes in Snapdragon Plants (Antirrhinum majus)

Mouginot

Aparicio

Gourcilleau

et al. 2021

Genes

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“…The yield components are sequentially determined and are counter-dependent. Reductions in the grain number per unit land area due to an increase in temperature have been widely reported, as has a reduction in the grain weight, which depends on the environmental conditions before flowering and during grain filling [ 96 , 97 ]. Although drought stress in the pre-flowering period can influence the grain weight [ 98 ], the grain filling period is considered critical for the final grain weight [ 99 ].…”

Section: Traits and Qtl Analysismentioning

confidence: 99%

From Genetic Maps to QTL Cloning: An Overview for Durum Wheat

Colasuonno

Marcotuli

Gadaleta

et al. 2021

Plants

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Durum wheat is one of the most important cultivated cereal crops, providing nutrients to humans and domestic animals. Durum breeding programs prioritize the improvement of its main agronomic traits; however, the majority of these traits involve complex characteristics with a quantitative inheritance (quantitative trait loci, QTL). This can be solved with the use of genetic maps, new molecular markers, phenotyping data of segregating populations, and increased accessibility to sequences from next-generation sequencing (NGS) technologies. This allows for high-density genetic maps to be developed for localizing candidate loci within a few Kb in a complex genome, such as durum wheat. Here, we review the identified QTL, fine mapping, and cloning of QTL or candidate genes involved in the main traits regarding the quality and biotic and abiotic stresses of durum wheat. The current knowledge on the used molecular markers, sequence data, and how they changed the development of genetic maps and the characterization of QTL is summarized. A deeper understanding of the trait architecture useful in accelerating durum wheat breeding programs is envisioned.

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“…The response of each wheat yield component to drought stress depends on the specific cultivar and the developmental stage in which the stress occurs (Barnabás, Jäger, & Fehér, 2008;Gupta, Gupta, & Kumar, 2008;Hlaváčová et al, 2018). Crops are generally more sensitive to drought stress during the reproductive stages of development, which mainly influence grain numbers and grain weight (Anwaar et al, 2019;Nicolas, Gleadow, & Dalling, 1984;Wang et al, 2017).…”

Section: Response Of Yield Components Of Wheat To Drought Stressmentioning

confidence: 99%

Spike formation and seed setting of the main stem and tillers under post‐jointing drought in winter wheat

Lin

Shang

et al. 2020

J Agronomy Crop Science

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To clarify the influence of post-jointing drought on the ear-bearing and seed-setting characteristics of the main stem and tillers of winter wheat (Triticum aestivum L.), a pot experiment was conducted with cultivars "Shannong 29" (SN29) and "Heng 0628" (H0628), and five water regimes: mild drought (WR1) and severe drought (WR2) for 0-5 days after jointing, mild drought (WR3) and severe drought (WR4) for 0-10 days after jointing and adequate water supply as a control (CK). The present study focused on primary tillers (appear in the axils of main stem leaves: T1, T2, T3, T4, etc.), as well as on secondary tillers (appear from the bud in the axil of the prophyll: T10 and T20; appear in the axil of the first leaf of the primary tiller T1: T11). The yield components of tillers showed a downward trend with increasing tiller position and drought degree and duration, and the kernels per spike, single kernels weight and grain yield per spike of tillers T2, T3, T10 and T4 decreased more than those of the other tillers. These outcomes may be related to the spike developmental stages at the time of the drought period. Severe drought during the period from when the stamen primordium is first present (Waddington's stage 4) to when the carpel extends around the three sides of the ovule (Waddington's stage 5) significantly decreased the seed set of tillers, but short-term (5 days) mild drought during this period and even a short-term severe drought before Waddington's stage 4 had little effect on the seed set of tillers. The ear-bearing capacity of tillers was determined not only by the spike developmental stage, but also by the gap from the main stem and the competition of nutrition and space between tillers. Although the ear-bearing rate of tillers T3 and T10 decreased rapidly after the short-term mild drought, the increase in the ear-bearing rate of tillers T20 and T11 effectively compensated for the loss of the number of spikes per plant. Therefore, the short-term mild drought at the jointing stage had no significant effect on the grain yield of the two cultivars. The tillers T2, T3, T10 and T4 were sensitive to soil moisture in the jointing stage and had high plasticity. During this period, if timely irrigation improves soil moisture, it is expected to increase the earbearing rate and seed set of these tillers, thereby increasing grain yield.

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Interactive effects of high temperature and drought stress during stem elongation, anthesis and early grain filling on the yield formation and photosynthesis of winter wheat

Cited by 112 publications

References 69 publications

Phenotypic Response to Light Versus Shade Associated with DNA Methylation Changes in Snapdragon Plants (Antirrhinum majus)

Phenotypic Response to Light Versus Shade Associated with DNA Methylation Changes in Snapdragon Plants (Antirrhinum majus)

From Genetic Maps to QTL Cloning: An Overview for Durum Wheat

Spike formation and seed setting of the main stem and tillers under post‐jointing drought in winter wheat

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