Investigation of the novel transcriptional changes under combined drought and bacterial stress underpins the role of AtMYB96 in imparting tolerance

Choudhary, Aanchal; Senthil‐Kumar, Muthappa

doi:10.1007/s13562-021-00724-7

Cited by 7 publications

(6 citation statements)

References 36 publications

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“…In a previously published transcriptome dataset from plants exposed to individual drought or P. syringae pv. tomato DC3000 treatment, as well as their combination (Choudhary & Senthil‑Kumar, 2021; Gupta et al, 2016b), genes commonly regulated by both drought and pathogen stress exhibited strong antagonism (Figure 3b). Once again, drought downregulated defence pathway genes related to SA, systemic acquired resistance, and JA pathways; genes responsive to bacterial and fungal attacks; genes responsive to oxidative stress signalling; and genes related to the secondary metabolism pathway (Figure 3c).…”

Section: Primary Defence Framework Under Droughtmentioning

confidence: 98%

“…Notably, the response to combined stress involves the modulation of genes altered under individual stresses. However, a distinct set of genes is uniquely altered under combined stress (Choudhary & Senthil‑Kumar, 2021; Zhang & Sonnewald, 2017), suggesting that the expression profile of plants exposed to combined stress is not simply an additive response to each of the two stress factors. Instead, plants perceive the stress combination as a unique state of stress.…”

Section: Primary Defence Framework Under Droughtmentioning

confidence: 99%

“…Simultaneously, genes involved in growth, development, photosynthesis, and carbon metabolism are consistently downregulated across all stress conditions (Gupta et al, 2016b). The transcriptomes of plants under combined stress reveals specific regulation of genes involved in signalling networks, including those encoding catalases, transferases, kinases, phosphatases, transporters, and transcription factors (Choudhary & Senthil‑Kumar, 2021).…”

Section: Primary Defence Framework Under Droughtmentioning

confidence: 99%

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Drought: A context‐dependent damper and aggravator of plant diseases

Choudhary,

Senthil‐Kumar

2024

Plant Cell & Environment

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Drought dynamically influences the interactions between plants and pathogens, thereby affecting disease outbreaks. Understanding the intricate mechanistic aspects of the multiscale interactions among plants, pathogens, and the environment—known as the disease triangle—is paramount for enhancing the climate resilience of crop plants. In this review, we systematically compile and comprehensively analyse current knowledge on the influence of drought on the severity of plant diseases. We emphasise that studying these stresses in isolation is not sufficient to predict how plants respond to combined stress from both drought and pathogens. The impact of drought and pathogens on plants is complex and multifaceted, encompassing the activation of antagonistic signalling cascades in response to stress factors. The nature, intensity, and temporality of drought and pathogen stress occurrence significantly influence the outcome of diseases. We delineate the drought‐sensitive nodes of plant immunity and highlight the emerging points of crosstalk between drought and defence signalling under combined stress. The limited mechanistic understanding of these interactions is acknowledged as a key research gap in this area. The information synthesised herein will be crucial for crafting strategies for the accurate prediction and mitigation of future crop disease risks, particularly in the context of a changing climate.

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Section: Primary Defence Framework Under Droughtmentioning

confidence: 98%

Section: Primary Defence Framework Under Droughtmentioning

confidence: 99%

Section: Primary Defence Framework Under Droughtmentioning

confidence: 99%

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Drought: A context‐dependent damper and aggravator of plant diseases

Choudhary,

Senthil‐Kumar

2024

Plant Cell & Environment

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“…Similarly, transgenic rice plants overexpressing OsMYB2P-1 exhibited increased tolerance to inorganic phosphate starvation through the promotion of primary root elongation ( Dai et al, 2012 ). In Arabidopsis , AtMYB60 and AtMYB61 have been implicated in root development and stomatal aperture ( Liang et al, 2005 ; Simeoni et al, 2022 ), while AtMYB44 , AtMYB52 , and AtMYB96 have been associated with drought stress response via ABA-mediated pathways ( Joo et al, 2017 ; Park, Kang & Kim, 2011 ; Choudhary & Senthil-Kumar, 2021 ). Despite extant studies on the MYB gene family, a comprehensive genome-wide characterization of this family remains absent in C. moschata .…”

Section: Introductionmentioning

confidence: 99%

Genome‑wide analysis of the MYB gene family in pumpkin

Xu,

Fu,

et al. 2024

PeerJ

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The MYB gene family exerts significant influence over various biological processes and stress responses in plants. Despite this, a comprehensive analysis of this gene family in pumpkin remains absent. In this study, the MYB genes of Cucurbita moschata were identified and clustered into 33 groups (C1-33), with members of each group being highly conserved in terms of their motif composition. Furthermore, the distribution of 175 CmoMYB genes across all 20 chromosomes was found to be non-uniform. Examination of the promoter regions of these genes revealed the presence of cis-acting elements associated with phytohormone responses and abiotic/biotic stress. Utilizing quantitative real-time polymerase chain reaction (qRT-PCR), the expression patterns of 13 selected CmoMYB genes were validated, particularly in response to exogenous phytohormone exposure and various abiotic stressors, including ABA, SA, MeJA, and drought treatments. Expression analysis in different tissues showed that CmoMYB genes are expressed at different levels in different tissues, suggesting that they are functionally divergent in regulating growth and abiotic stresses. These results provide a basis for future studies to characterize the function of the MYB gene family under abiotic stresses in pumpkins.

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“…We made an attempt to identify candidate genes in rice plants exposed to the combined stress of drought and bacterial blight causing pathogen infection. The major challenge in studying the multiple stresses, is imposition of combined stresses simultaneously [ 19 ]. Severe drought stress reduces the bacterial multiplication due to higher leaf water loss [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic responses under combined bacterial blight and drought stress in rice reveal potential genes to improve multi-stress tolerance

et al. 2022

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Background The unprecedented drought and frequent occurrence of pathogen infection in rice is becoming more due to climate change. Simultaneous occurrence of stresses lead to more crop loss. To cope up multiple stresses, the durable resistant cultivars needs to be developed, by identifying relevant genes from combined biotic and abiotic stress exposed plants. Results We studied the effect of drought stress, bacterial leaf blight disease causing Xanthomonas oryzae pv. oryzae (Xoo) pathogen infection and combined stress in contrasting BPT5204 and TN1 rice genotypes. Mild drought stress increased Xoo infection irrespective of the genotype. To identify relevant genes that could be used to develop multi-stress tolerant rice, RNA sequencing from individual drought, pathogen and combined stresses in contrasting genotypes has been developed. Many important genes are identified from resistant genotype and diverse group of genes are differentially expressed in contrasting genotypes under combined stress. Further, a meta-analysis from individual drought and Xoo pathogen stress from public domain data sets narrowed- down candidate differentially expressed genes. Many translation associated genes are differentially expressed suggesting their extra-ribosomal function in multi-stress adaptation. Overexpression of many of these genes showed their relevance in improving stress tolerance in rice by different scientific groups. In combined stress, many downregulated genes also showed their relevance in stress adaptation when they were over-expressed. Conclusions Our study identifies many important genes, which can be used as molecular markers and targets for genetic manipulation to develop durable resistant rice cultivars. Strategies should be developed to activate downregulated genes, to improve multi-stress tolerance in plants.

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Investigation of the novel transcriptional changes under combined drought and bacterial stress underpins the role of AtMYB96 in imparting tolerance

Cited by 7 publications

References 36 publications

Drought: A context‐dependent damper and aggravator of plant diseases

Drought: A context‐dependent damper and aggravator of plant diseases

Genome‑wide analysis of the MYB gene family in pumpkin

Transcriptomic responses under combined bacterial blight and drought stress in rice reveal potential genes to improve multi-stress tolerance

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