The Plant Metabolic Changes and the Physiological and Signaling Functions in the Responses to Abiotic Stress

Zhu, Feng; Sun, Yuming; Jadhav, Sagar Sudam; Cheng, Yunjiang; Alseekh, Saleh; Fernie, Alisdair R.

doi:10.1007/978-1-0716-3044-0_7

Cited by 1 publication

(1 citation statement)

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“…Plants face several external stresses such as abiotic stresses, including chemical and physical changes, changes in light intensity, temperature fluctuations, nutrients and water availability, wind and other mechanical stimuli, and biotic stresses, including various pathogens [ 30 , 31 ]. Environmental stresses have an impact on the directly exposed generations as well as on their progeny [ 32 ]. This study aimed to understand the multigenerational cold-stress effects on plant genotypes and epigenotypes.…”

Section: Discussionmentioning

confidence: 99%

Genomic and Epigenomic Changes in the Progeny of Cold-Stressed Arabidopsis thaliana Plants

Rahman,

Yadav,

Byeon

et al. 2024

IJMS

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Plants are continuously exposed to various environmental stresses. Because they can not escape stress, they have to develop mechanisms of remembering stress exposures somatically and passing it to the progeny. We studied the Arabidopsis thaliana ecotype Columbia plants exposed to cold stress for 25 continuous generations. Our study revealed that multigenerational exposure to cold stress resulted in the changes in the genome and epigenome (DNA methylation) across generations. Main changes in the progeny were due to the high frequency of genetic mutations rather than epigenetic changes; the difference was primarily in single nucleotide substitutions and deletions. The progeny of cold-stressed plants exhibited the higher rate of missense non-synonymous mutations as compared to the progeny of control plants. At the same time, epigenetic changes were more common in the CHG (C = cytosine, H = cytosine, adenine or thymine, G = guanine) and CHH contexts and favored hypomethylation. There was an increase in the frequency of C to T (thymine) transitions at the CHH positions in the progeny of cold stressed plants; because this type of mutations is often due to the deamination of the methylated cytosines, it can be hypothesized that environment-induced changes in methylation contribute to mutagenesis and may be to microevolution processes and that RNA-dependent DNA methylation plays a crucial role. Our work supports the existence of heritable stress response in plants and demonstrates that genetic changes prevail.

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Section: Discussionmentioning

confidence: 99%