Drought responsive transcriptome profiling in roots of contrasting rice genotypes

Raveendran, M.; Rahman, Hazir; Manoharan, Muthukumar; Ramanathan, V.; Jeyabalan, Nallathambi

doi:10.1007/s40502-018-0381-9

Cited by 20 publications

(12 citation statements)

References 82 publications

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“…Additionally, we have also performed many analyses that gave us graphical results ( Muthurajan et al, 2018 ). The results were incredibly significant and demonstrated that hormones could reduce growth under drought stress ( Chen G. et al., 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Brassinosteroids induced drought resistance of contrasting drought-responsive genotypes of maize at physiological and transcriptomic levels

et al. 2022

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The present study investigated the brassinosteroid-induced drought resistance of contrasting drought-responsive maize genotypes at physiological and transcriptomic levels. The brassinosteroid (BR) contents along with different morphology characteristics, viz., plant height (PH), shoot dry weight (SDW), root dry weight (RDW), number of leaves (NL), the specific mass of the fourth leaf, and antioxidant activities, were investigated in two maize lines that differed in their degree of drought tolerance. In response to either control, drought, or brassinosteroid treatments, the KEGG enrichment analysis showed that plant hormonal signal transduction and starch and sucrose metabolism were augmented in both lines. In contrast, the phenylpropanoid biosynthesis was augmented in lines H21L0R1 and 478. Our results demonstrate drought-responsive molecular mechanisms and provide valuable information regarding candidate gene resources for drought improvement in maize crop. The differences observed for BR content among the maize lines were correlated with their degree of drought tolerance, as the highly tolerant genotype showed higher BR content under drought stress.

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Section: Discussionmentioning

confidence: 99%

Brassinosteroids induced drought resistance of contrasting drought-responsive genotypes of maize at physiological and transcriptomic levels

et al. 2022

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“…OsWRKY08 is induced by drought in N22 flag leaf, while repressed in IR64 flag leaf. The polygalacturonase gene LOC_Os02g54030 has previously been shown to be specifically up‐regulated in the roots of the drought‐tolerant variety Nootripathu compared with the transcriptome of the drought susceptible variety IR20 (Muthurajan et al 2018). This gene is specifically up‐regulated in the roots of N22 and not IR64.…”

Section: Discussionmentioning

confidence: 99%

Variety‐specific transcript accumulation during reproductive stage in drought‐stressed rice

Gour

Kansal

Agarwal

et al. 2021

Physiologia Plantarum

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The divergence of natural stress tolerance mechanisms between species is an intriguing phenomenon. To study it in rice, a comparative transcriptome analysis was carried out in 'heading' stage tissue (flag leaf, panicles and roots) of Nagina 22 (N22; drought-tolerant) and IR64 (drought-sensitive) plants subjected to field drought.Interestingly, N22 showed almost double the number of differentially expressed genes (DEGs) than IR64. Many DEGs colocalized within drought-related QTLs responsible for grain yield and drought tolerance and also associated with drought tolerance and critical drought-related plant traits such as leaf rolling, trehalose content, sucrose and cellulose content. Besides, co-expression analysis of the DEGs revealed several 'hub' genes known to actively regulate drought stress response.Strikingly, 1366 DEGs, including 21 'hub' genes, showed a distinct opposite regulation in the two rice varieties under similar drought conditions. Annotation of these variety-specific DEGs (VS-DEGs) revealed that they are distributed in various biological pathways. Furthermore, 103 VS-DEGs were found to physically interact with over 1300 genes, including 32 that physically interact with other VS-DEGs as well. The promoter region of these genes has sequence variations among the two rice varieties, which might be in part responsible for their unique expression pattern.

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“…Likewise, in droughttolerant species, carbohydrate metabolism genes were upregulated, while they were found to be downregulated in drought-sensitive genotypes under severe drought [70]. Autophagyassociated genes were found to be upregulated only in drought-sensitive species under drought stress [71]. Drought-tolerant varieties have a distinct RSA, including a shallow or deep root, compared to sensitive genotypes, but they do not have a significant difference in physiological mechanism [22].…”

Section: Drought Stressmentioning

confidence: 96%

Root System Architecture and Omics Approaches for Belowground Abiotic Stress Tolerance in Plants

2022

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Plant growth and productivity is negatively affected by several abiotic stresses. To overcome the antagonistic effect of a changing environment, plants have evolved several modifications at the physiological as well as molecular levels. Besides being a vital organ for a plant’s nutrient uptake, roots also plays a significant role in abiotic stress regulation. This review provides insight into changing Root System Architecture (RSA) under varying environmental stimuli using high-throughput omics technologies. Several next-generation and high-throughput omics technologies, such as phenomics, genomics, transcriptomics, proteomics, and metabolomics, will help in the analysis of the response of root architectural traits under climatic vagaries and their impact on crop yield. Various phenotypic technologies have been implied for the identification of diverse root traits in the field as well as laboratory conditions, such as root-box pinboards, rhizotrons, shovelomics, ground-penetrating radar, etc. These phenotypic analyses also help in identifying the genetic regulation of root-related traits in different crops. High-throughput genomic as well as transcriptome analysis has led researchers to unravel the role of the root system in response to these environmental cues, even at the single-cell level. Detailed analysis at the protein and metabolite levels can provide a better understanding of the response of roots under different abiotic stresses. These technologies will help in the improvement of crop productivity and development of resistant varieties.

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Drought responsive transcriptome profiling in roots of contrasting rice genotypes

Cited by 20 publications

References 82 publications

Brassinosteroids induced drought resistance of contrasting drought-responsive genotypes of maize at physiological and transcriptomic levels

Brassinosteroids induced drought resistance of contrasting drought-responsive genotypes of maize at physiological and transcriptomic levels

Variety‐specific transcript accumulation during reproductive stage in drought‐stressed rice

Root System Architecture and Omics Approaches for Belowground Abiotic Stress Tolerance in Plants

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