Drought Response in Rice: The miRNA Story

Nadarajah, Kalaivani K.; Kumar, Ilakiya Sharanee

doi:10.3390/ijms20153766

Cited by 77 publications

(54 citation statements)

References 150 publications

(212 reference statements)

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“…The overexpression of miR398-resistance from CSD2 is involved in the enhanced tolerance of various kinds of abiotic stresses [51]. The investigation of interactions between miR398 and its targeted CSD1 and CSD2 genes provided a possible description to previous studies [33,34,45]. The transgenic lines of SOD with miR398 targeted sites negatively impacted the miR398-mediated gene regulation.…”

Section: Mirnas In Abiotic Stress Tolerancementioning

confidence: 99%

“…A phosphate group is attached at the 5 end and a hydroxyl group at the 3 end of mature miRNA. miRNA targets the 3 UTR region of specific mRNA, thereby provoking the silencing of post-transcription, causing the degradation of mRNA and/or inhibition of its translation [33][34][35]. In the past decade, researchers mainly aimed to identify miRNAs with a great capability to induce abiotic (chilling, drought, and heavy metal) stress tolerance.…”

Section: Mirnas In Abiotic Stress Tolerancementioning

confidence: 99%

“…miR393 was observed to be strongly up-regulated by dehydration, cold, high salinity, and ABA treatments in various plant species [36,37]. In Arabidopsis, miR169 was down-regulated by drought stress, and its target nuclear factor YA5 (NF-YA5) was significantly induced upon exposure to drought stress [34,39]. The miRNA169a-overexpressing plants were enhanced by leaf water loss and were highly sensitive to drought stress, when compared to wild type plants, while the miRNA169a-targeted NF-YA5-overexpression increased drought stress tolerance [40].…”

Section: Mirnas In Abiotic Stress Tolerancementioning

confidence: 99%

“…Transgenic breeding or biotechnology approaches play a fundamental role in mining candidate genes potentially involved in drought stress tolerance [3,10]. Various molecular techniques (marker-assisted selection (MAS) and genomic selection (GS) and QTL-mapping are used to identify candidate gene (that's can control a specific character), and CRISPR-Cas9 is being used to make transgenic lines for the drought stress tolerance of crops ( Supplementary Table S1) [34].…”

Section: Drought Stressmentioning

confidence: 99%

“…Plants respond to drought stress by up-regulating or down-regulating the expression of certain miRNAs or synthesizing new miRNAs [36,107]. Some drought stress response miRNAs have been reported in numerous plants, such as A. thaliana, Oryza sativa, barley, wheat, and soybeans, using high-throughput sequencing technology [34][35][36]. For example, the miR169 family is a conserved and large-scale miRNA gene family in plants, which is involved in abiotic stress tolerance [40].…”

Section: Drought Stressmentioning

confidence: 99%

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Transgenic Breeding Approaches for Improving Abiotic Stress Tolerance: Recent Progress and Future Perspectives

Anwar

Kim

2020

IJMS

107

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The recent rapid climate changes and increasing global population have led to an increased incidence of abiotic stress and decreased crop productivity. Environmental stresses, such as temperature, drought, nutrient deficiency, salinity, and heavy metal stresses, are major challenges for agriculture, and they lead to a significant reduction in crop growth and productivity. Abiotic stress is a very complex phenomenon, involving a variety of physiological and biochemical changes in plant cells. Plants exposed to abiotic stress exhibit enhanced levels of ROS (reactive oxygen species), which are highly reactive and toxic and affect the biosynthesis of chlorophyll, photosynthetic capacity, and carbohydrate, protein, lipid, and antioxidant enzyme activities. Transgenic breeding offers a suitable alternative to conventional breeding to achieve plant genetic improvements. Over the last two decades, genetic engineering/transgenic breeding techniques demonstrated remarkable developments in manipulations of the genes for the induction of desired characteristics into transgenic plants. Transgenic approaches provide us with access to identify the candidate genes, miRNAs, and transcription factors (TFs) that are involved in specific plant processes, thus enabling an integrated knowledge of the molecular and physiological mechanisms influencing the plant tolerance and productivity. The accuracy and precision of this phenomenon assures great success in the future of plant improvements. Hence, transgenic breeding has proven to be a promising tool for abiotic stress improvement in crops. This review focuses on the potential and successful applications, recent progress, and future perspectives of transgenic breeding for improving abiotic stress tolerance and productivity in plants.

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Section: Mirnas In Abiotic Stress Tolerancementioning

confidence: 99%

Section: Mirnas In Abiotic Stress Tolerancementioning

confidence: 99%

Section: Mirnas In Abiotic Stress Tolerancementioning

confidence: 99%

Section: Drought Stressmentioning

confidence: 99%

Section: Drought Stressmentioning

confidence: 99%

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Transgenic Breeding Approaches for Improving Abiotic Stress Tolerance: Recent Progress and Future Perspectives

Anwar

Kim

2020

IJMS

107

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A multi‐level approach reveals key physiological and molecular traits in the response of two rice genotypes subjected to water deficit at the reproductive stage

Favreau,

Gaal,

Pereira de Lima

et al. 2023

Plant Enviro Interactions

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Rice is more vulnerable to drought than maize, wheat, and sorghum because its water requirements remain high throughout the rice life cycle. The effects of drought vary depending on the timing, intensity, and duration of the events, as well as on the rice genotype and developmental stage. It can affect all levels of organization, from genes to the cells, tissues, and/or organs. In this study, a moderate water deficit was applied to two contrasting rice genotypes, IAC 25 and CIRAD 409, during their reproductive stage. Multi‐level transcriptomic, metabolomic, physiological, and morphological analyses were performed to investigate the complex traits involved in their response to drought. Weighted gene network correlation analysis was used to identify the specific molecular mechanisms regulated by each genotype, and the correlations between gene networks and phenotypic traits. A holistic analysis of all the data provided a deeper understanding of the specific mechanisms regulated by each genotype, and enabled the identification of gene markers. Under non‐limiting water conditions, CIRAD 409 had a denser shoot, but shoot growth was slower despite better photosynthetic performance. Under water deficit, CIRAD 409 was weakly affected regardless of the plant level analyzed. In contrast, IAC 25 had reduced growth and reproductive development. It regulated transcriptomic and metabolic activities at a high level, and activated a complex gene regulatory network involved in growth‐limiting processes. By comparing two contrasting genotypes, the present study identified the regulation of some fundamental processes and gene markers, that drive rice development, and influence its response to water deficit, in particular, the importance of the biosynthetic and regulatory pathways for cell wall metabolism. These key processes determine the biological and mechanical properties of the cell wall and thus influence plant development, organ expansion, and turgor maintenance under water deficit. Our results also question the genericity of the antagonism between morphogenesis and organogenesis observed in the two genotypes.

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