Characterization of the first tuber mustard calmodulin-like gene, BjAAR1, and its functions in responses to abiotic stress and abscisic acid in Arabidopsis

Under severe drought conditions, Brassica juncea shows differential methylation and demethylation events, such that certain epialleles are silenced and some are activated. The plant employed avoidance strategy by delaying apoptosis through the activation of several genes. Harsh environmental conditions pose serious threat to normal growth and development of crops, sometimes leading to their death. However, plants have developed an essential mechanism of modulation of gene activities by epigenetic modifications. Brassica juncea is an important oilseed crop contributing effectively to the economy of India. In the present investigation, we studied the changes in the methylation level of various stress-responsive genes of B. juncea variety RH30 by methylation-dependent immune-precipitation-chip in response to severe drought. On the basis of changes in the number of differential methylation regions in response to drought, the promoter regions were designated as hypermethylated and hypomethylated. Gene body methylation increased in all the genes, whereas promoter methylation was dependent on the function of the gene. Overall, the genes responsible for delaying apoptosis were hypomethylated and many genes responsible for normal routine activities were hypermethylated at promoter regions, thereby suggesting that these may be suspending the activities under harsh conditions.

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Epiallelic changes in known stress-responsive genes under extreme drought conditions in Brassica juncea (L.) Czern.

Sharma

Vishal

Kaul

et al. 2016

Plant Cell Rep

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Calmodulin-like gene MtCML40 is involved in salt tolerance by regulating MtHKTs transporters in Medicago truncatula

Zhang

Wang

Liu

et al. 2019

Environmental and Experimental Botany

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Overexpression of CaDSR6 increases tolerance to drought and salt stresses in transgenic Arabidopsis plants

Kim

Seo²,

Park

et al. 2014

Gene

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Characterization of the first tuber mustard calmodulin-like gene, BjAAR1, and its functions in responses to abiotic stress and abscisic acid in Arabidopsis

Cited by 3 publications

References 35 publications

Epiallelic changes in known stress-responsive genes under extreme drought conditions in Brassica juncea (L.) Czern.

Epiallelic changes in known stress-responsive genes under extreme drought conditions in Brassica juncea (L.) Czern.

Calmodulin-like gene MtCML40 is involved in salt tolerance by regulating MtHKTs transporters in Medicago truncatula

Overexpression of CaDSR6 increases tolerance to drought and salt stresses in transgenic Arabidopsis plants

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