Recently, Nanjing Agricultural University published a new research article on PNAS, revealing how genomic polyploidy can enhance rice's ability to adapt to salt stress environments from the level of DNA methylation and transcription.
Genome polyploidy (doubling of the whole genome) has generally occurred during the evolution of plants.
Studies have shown that multiplying the genome will enhance the adaptation of plants to unfavorable environments and expand their range of survival.
The study found that compared with diploid rice, tetraploid rice reduces the absorption of sodium ions and has a stronger ability to survive in salt stress environments.
At the same time, the activation of stress-related genes in tetraploid rice will induce the activation of adjacent transposons, which will increase the methylation level of the transposon region to inhibit the transposon and maintain the stability of the genome.
This feedback regulation enhances the adaptability of tetraploid rice to salt stress.
This study analyzed the epigenetic mechanism of polyploid rice to enhance salt tolerance for the first time, and provided a new molecular mechanism for polyploid species to enhance environmental adaptability during evolution.
Related paper information: org/10.
org/10.
1073/pnas.
2023981118" target="_blank">https://doi.
org/10.
1073/pnas.
2023981118
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