Transcriptional Network Involved in Drought Response and Adaptation in Cereals

Yang, Yunfei; Sornaraj, Pradeep; Borisjuk, Nikolai; Kovalchuk, Nataliya; Haefele, S. M.

doi:10.5772/62336

Cited by 12 publications

(8 citation statements)

References 127 publications

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“…Drought stress induces the production of organic molecules along with H 2 O 2 production in cotton [77]. One other study showed that when drought stress was increased to higher levels, it raised the rate of hydrogen peroxide concentration in Poplar species [78]. In the current experiment, it was also observed that hydrogen peroxide contents were increased under drought stress.…”

Section: Discussionsupporting

confidence: 63%

Ecotypic Morphological and Physio-Biochemical Responses of Two Differentially Adapted Forage Grasses, Cenchrus ciliaris L. and Cyperus arenarius Retz. to Drought Stress

et al. 2021

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Crop performance and yield are the results of genotypic expression as modulated by continuous interaction with the environment. Among the environmental aspects, drought and salinity are the most important factors, which limit the forages, including grasses, on a global basis. Grass species have the ability to grow under low water conditions and can produce high dry yield, proteins, and energy in areas exposed to drought stress. For this purpose, we conducted the present study to understand the response of forage grasses under drought stress from two different regions (Salt Range and Faisalabad) of Punjab, Pakistan. Two ecotypes of each grass species (Cenchrus ciliaris L. and Cyperus arenarius Retz.) were grown in pots at the botanical research area, Government College University Faisalabad, Pakistan. A group of plants were subjected to drought stress (60% field capacity) and controlled (100% field capacity) after three weeks of seed germination. The results from the present study depicted that the fresh and dry weights of root and shoot were decreased significantly under drought conditions. Moreover, C. ciliaris of the Salt Range area showed more resistance and higher growth production under drought stress. The chlorophyll (a and b) contents were also decreased significantly, while MDA, total soluble sugars, and proline levels were increased significantly under water-limited environments in the C. arenarius of Salt Range area. Enzymatic antioxidants (superoxidase dismutase (SOD) and peroxidase (POD)) and leaf Na+ were significantly raised in C. arenarius under drought stress collected from the Faisalabad region. Cenchrus ciliaris showed higher level of H2O2, total soluble proteins, glycinebetaine, catalase (CAT) and POD compared to C. arenarius. It also retained more leaf and root Ca2+, and root K+ under drought stress. It was concluded from the study that C. ciliaris is more resistant to drought in biomass production collected from the Salt Range area. The results suggested that C. ciliaris can be more widely used as a forage grass under water-scarce conditions as compared to C. arenarius.

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Section: Discussionsupporting

confidence: 63%

Ecotypic Morphological and Physio-Biochemical Responses of Two Differentially Adapted Forage Grasses, Cenchrus ciliaris L. and Cyperus arenarius Retz. to Drought Stress

et al. 2021

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“…ABA plays an important role in plant response to osmotic stress, and its accumulation leads to stomata's closing to curb water loss. ABA also modulates the phosphorylation status of TFs and other regulatory proteins involved in stress response [69,90]. The involvement of HSF genes in plant response to drought has been documented in different species, including Sorghum bicolor L. [91], potato (Solanum tuberosum L.) [92], and Arabidopsis [93].…”

Section: Modulation Of Hsfs and Hsps Under Drought And Heat Stressesmentioning

confidence: 99%

Molecular and Physiological Responses of Rice and Weedy Rice to Heat and Drought Stress

et al. 2020

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Rice is the staple food for about half of the world population. Rice grain yield and quality are affected by climatic changes. Arguably, rice cultivars’ genetic diversity is diminished from decades of breeding using narrow germplasm, requiring introgressions from other Oryza species, weedy or wild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement. Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA 424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in response to heat and drought stress. Drought and heat stress affected the phenotype and photosynthetic parameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded better under heat stress than the non-stressed check. Drought stress upregulated HSF7A while heat stress upregulated HSF2a. HSP74.8, HSP80.2, and HSP24.1 were upregulated in both conditions. Based on all evaluated traits, we hypothesized that in drought conditions increasing HSFA7 expression is related to tiller number and that increase WUE (water use efficiency) and HSFA2a expression are associated with yield. In heat conditions, Gs (stomatal conductance) and E’s increases may be related to plant height; tiller number is inversely associated with HSPs expression, and chlorophyll content and Ci (intercellular CO2 concentration) may be related to yield. Based on morphology, physiology, and gene regulation in heat and drought stress, we can discriminate genotypes that perform well under these stress conditions and utilize such genotypes as a source of genetic diversity for rice breeding.

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“…Two groups of genes involved in abiotic stress regulatory networks have been identified (Gong et al ., ; Hu et al ., ; Sazegari et al ., ; Yang et al ., ). The first group is represented by functional genes, whose expression is initiated or altered by stress‐related transcription factors (TFs), and the final products of these genes are directly involved in biochemical and physiological changes required for stress acclimations (Nakashima et al ., ; Novillo et al ., ; Shinozaki et al ., ).…”

Section: Introductionmentioning

confidence: 97%

DREB/CBF expression in wheat and barley using the stress‐inducible promoters of HD‐Zip I genes: impact on plant development, stress tolerance and yield

Yang

Al-Baidhani

Harris

et al. 2019

Plant Biotechnology Journal

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Summary Networks of transcription factors regulate diverse physiological processes in plants to ensure that plants respond to abiotic stresses rapidly and efficiently. In this study, expression of two DREB/CBF genes, TaDREB3 and TaCBF5L, was modulated in transgenic wheat and barley, by using stress‐responsive promoters HDZI‐3 and HDZI‐4. The promoters were derived from the durum wheat genes encoding the γ‐clade TFs of the HD‐Zip class I subfamily. The activities of tested promoters were induced by drought and cold in leaves of both transgenic species. Differences in sensitivity of promoters to drought strength were dependent on drought tolerance levels of cultivars used for generation of transgenic lines. Expression of the DREB/CBF genes under both promoters improved drought and frost tolerance of transgenic barley, and frost tolerance of transgenic wheat seedlings. Expression levels of the putative TaCBF5L downstream genes in leaves of transgenic wheat seedlings were up‐regulated under severe drought, and up‐ or down‐regulated under frost, compared to those of control seedlings. The application of TaCBF5L driven by the HDZI‐4 promoter led to the significant increase of the grain yield of transgenic wheat, compared to that of the control wild‐type plants, when severe drought was applied during flowering; although no yield improvements were observed when plants grew under well‐watered conditions or moderate drought. Our findings suggest that the studied HDZI promoters combined with the DREB/CBF factors could be used in transgenic cereal plants for improvement of abiotic stress tolerance, and the reduction of negative influence of transgenes on plant development and grain yields.

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Transcriptional Network Involved in Drought Response and Adaptation in Cereals

Cited by 12 publications

References 127 publications

Ecotypic Morphological and Physio-Biochemical Responses of Two Differentially Adapted Forage Grasses, Cenchrus ciliaris L. and Cyperus arenarius Retz. to Drought Stress

Ecotypic Morphological and Physio-Biochemical Responses of Two Differentially Adapted Forage Grasses, Cenchrus ciliaris L. and Cyperus arenarius Retz. to Drought Stress

Molecular and Physiological Responses of Rice and Weedy Rice to Heat and Drought Stress

DREB/CBF expression in wheat and barley using the stress‐inducible promoters of HD‐Zip I genes: impact on plant development, stress tolerance and yield

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