ABA-mediated modulation of elevated CO2 on stomatal response to drought

Li, Shenglan; Li, Xiangnan; Wei, Zhenhua; Liu, Fulai

doi:10.1016/j.pbi.2019.12.002

Cited by 139 publications

(83 citation statements)

References 61 publications

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“…In recent years, several other substrates have been identified including abscisic acid (ABA). ABA has been well known to have a significant role under drought stress tolerance by controlling ABA-regulated mechanism [54] .…”

Section: 4in Silico Resultsmentioning

confidence: 99%

GWAS Analysis of Wheat Pre-breeding Germplasm for Terminal Drought Stress Using Next Generation Sequencing Technology

Shokat¹,

Sehgal²,

F³

et al. 2020

Preprint

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Bread wheat (Triticum aestivum L.) is one of the most important cereal crops for food security. Of all the stresses that curtail wheat productivity, drought has the most detrimental effects. Especially terminal drought stress i.e. at the time of flowering imposes a big challenge to sustain grain production. In the current study, 339 pre-breeding lines derived from three-way crosses of exotics x elite lines were evaluated in the irrigated and drought stress environments at Obregon, Mexico for the year 2016 and 2018. Drought significantly reduced yield (Y), spike length (SL), number of grains per spikes (NGS) and thousand kernel weight (TKW) by 46.4, 19.2, 23.5 and 25.9%, respectively in comparison to irrigated conditions. Kernel abortion (KA), highly correlated with Y, increased significantly (11.6%) under drought stress environment. Population structure analysis in this panel revealed three sub-populations and a genome wide linkage disequilibrium (LD) decay was at 2.5 cM. Single marker and haplotypes-based genome wide association study (GWAS) revealed significant associations on three chromosomes; 4A (HB10.7), 2D (HB6.10) and 3B (HB8.12) with Y, SL and TKW, respectively. Likewise, associations on chromosomes 6B (HB17.1) and 3A (HB7.11) were identified for NGS and on 3A (HB7.12) for KA. Five traits i.e. normalized difference vegetation index (NDVI), canopy temperature depression (CTD) days to heading (DTH), NGS, KA were associated at chromosome 3A both under irrigated and drought conditions however, different haplotypes were estimated. Twenty-six SNPs were part of 10 haplotype blocks associated with Y, SL, TKW, NGS and KA. In silico analysis of the associated SNPs/haplotypes showed hits with candidate genes known to confer abiotic stress resistance in model species and crops. Potential candidate genes include those coding for sulfite exporter TauE/SafE family in Arabidopsis thaliana, TBC domain containing protein in Oryza sativa subsp. Japonica and heat shock proteins in Aegilops tauschii subsp. tauschii were revealed. The SNPs linked to the promising genes identified in the study can be used for marker-assisted selection.

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Section: 4in Silico Resultsmentioning

confidence: 99%

GWAS Analysis of Wheat Pre-breeding Germplasm for Terminal Drought Stress Using Next Generation Sequencing Technology

Shokat¹,

Sehgal²,

F³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The response of wheat to drought stress varies among different growth stages, with anthesis being the most sensitive stage, as drought could directly reduce the floral growth and grain development (Karim & Ataur Rahman, 2015). Studies have indicated that CO 2 elevation could modulate the response of wheat to anthesis drought (Broberg, Högy, Feng, & Pleijel, 2019; Li, Li, et al, 2019; Uddin et al., 2018). Gasparini et al.…”

Section: Discussionmentioning

confidence: 99%

“…Li, Li, Wei, and Liu (2019) reported that drought stress decreases stomatal conductance (Gs), and plants grown under elevated CO 2 possess lower Gs and higher photosynthetic rate (An) in comparison to ambient CO 2 . Gas exchange in plants takes place through stomata, while opening and closing of stomata depends on diverse environmental factors including CO 2 concentration and water availability in the soil.…”

Section: Introductionmentioning

confidence: 99%

“…Wei, Fang, Li, Liu, and Liu (2020) reported that the endogenous ABA level plays an important role in modulating the effect of elevated CO 2 on the stomatal response to soil drying, where elevated CO 2 sensitized stomatal closure in wild type barley but retarded it in wild type tomato, while did not influence the sensitivity of stomata to drought in the ABA‐deficient mutants. Elevated CO 2 has been shown to positively act on maintaining crop yield under drought conditions (Li, Li, et al, 2019; Wullschleger, Tschaplinski, & Norby, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Likewise, grain development under drought is slowed down due to the limited availability of carbohydrates in source leaves which reduces the carbohydrate translocation to the sink resulting in lower supply of carbohydrates to the developing grains (Abid et al., 2018; Zhang et al., 2016). Li, Li, et al (2019) reported that, in comparison to plants grown under ambient CO 2 , elevated CO 2 alleviates the effect of drought by maintaining higher grain yield. However, the mechanism of yield increase is not clearly explained.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of elevated CO₂ on two contrasting wheat genotypes exposed to intermediate drought stress at anthesis

Shokat

Großkinsky

Liu

2020

J Agronomy Crop Science

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The objective of this experiment was to investigate the responses of contrasting wheat genotypes to drought stress under ambient and elevated CO2 environments. At anthesis, the plants from each CO2 levels were either exposed to progressive drought or well‐watered at 95% of pot holding capacity. The results showed that for both genotypes, CO2 elevation sensitized the plants’ response to soil drying in terms of reduction of evapotranspiration. Drought significantly reduced trans‐zeatin (tZ) concentration in leaves, salicylic acid (SA) concentration in spikes, and physiological and yield‐related traits. However, the concentration of abscisic acid (ABA) and other phytohormones was increased under drought, which coincided with an increase in the kernel abortion. Elevated CO2 significantly increased photosynthetic rate, but had no significant effect on yield‐related traits. Genotype L3 possessed higher concentration of leaf tz, osmotic potential, and spike SA/ABA ratio under combined drought and elevated CO2 as compared to genotype L2. L3 also had higher thousand kernel weight (TKW) and grain yield in comparison to L2. The results indicate that elevated CO2 is not necessarily increasing yield, and biophysiochemical traits in L3 could be used as valuable selecting criteria to obtain higher TKW and grain yield in future drier and CO2‐enriched environment.

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The role of genetic diversity and pre‐breeding traits to improve drought and heat tolerance of bread wheat at the reproductive stage

Shokat,

Großkinsky,

Singh

et al. 2023

Food and Energy Security

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Extreme weather including heat waves and drought episodes are expected to increase in intensity and duration due to climate change. Wheat, being a major crop is under extreme threat to these stresses especially at the reproductive stage. This review addresses the potential of diverse wheat germplasm (originated from landraces and synthetic derivatives) to cope with drought and heat stress at the flowering stage. Here, important marker‐trait associations were reported for sustainable grain production under drought and heat stress at anthesis. Likewise, the mechanisms of drought and heat resilience including gene expression and physiological traits (activities of carbohydrate metabolic and antioxidant enzymes, and endogenous hormonal responses) were explored. These studies helped to understand the genetic and physiological basis of drought and heat tolerance and certain pre‐breeding traits related to osmotic adjustment, phytohormonal regulation, antioxidant metabolism, and the expression of novel genes were identified. Moreover, identified pre‐breeding traits and genotypes can be utilized in breeding wheat cultivars resilient to future adverse environments.

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ABA-mediated modulation of elevated CO2 on stomatal response to drought

Cited by 139 publications

References 61 publications

GWAS Analysis of Wheat Pre-breeding Germplasm for Terminal Drought Stress Using Next Generation Sequencing Technology

GWAS Analysis of Wheat Pre-breeding Germplasm for Terminal Drought Stress Using Next Generation Sequencing Technology

Impact of elevated CO₂ on two contrasting wheat genotypes exposed to intermediate drought stress at anthesis

The role of genetic diversity and pre‐breeding traits to improve drought and heat tolerance of bread wheat at the reproductive stage

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ABA-mediated modulation of elevated CO2 on stomatal response to drought

Cited by 139 publications

References 61 publications

GWAS Analysis of Wheat Pre-breeding Germplasm for Terminal Drought Stress Using Next Generation Sequencing Technology

GWAS Analysis of Wheat Pre-breeding Germplasm for Terminal Drought Stress Using Next Generation Sequencing Technology

Impact of elevated CO2 on two contrasting wheat genotypes exposed to intermediate drought stress at anthesis

The role of genetic diversity and pre‐breeding traits to improve drought and heat tolerance of bread wheat at the reproductive stage

Contact Info

Product

Resources

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Impact of elevated CO₂ on two contrasting wheat genotypes exposed to intermediate drought stress at anthesis