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Abstract
The differences in satellite DNA methylation pattern of corn seedlings with various spontaneous chromosome aberration yields and changes in methylation pattern of these DNA sequences under different exposure modes of acute UV-C and chronic gamma-irradiations have been investigated. The obtained experimental data and the conducted correlation analysis demonstrated the significant correlation between the satellite DNA methylation pattern varieties and chromosome aberration yields under various stress exposure modes. The role of satellite DNA methylation pattern variability and its changing in key responses to stress such as mobile elements’ activation, cell’s passage of checkpoints, and homological repair was discussed.
Highlights
Changing organism’s resistance to stress factors, various reactions, which role in this process depends on factor’s acting rate, duration and/or periodicity
The obtained experimental data and the conducted correlation analysis demonstrated the significant correlation between the satellite DNA methylation pattern varieties and chromosome aberration yields under various stress exposure modes
The role of satellite DNA methylation pattern variability and its changing in key responses to stress such as mobile elements’ activation, cell’s passage of checkpoints, and homological repair was discussed
Summary
Changing organism’s resistance to stress factors, various reactions, which role in this process depends on factor’s acting rate, duration and/or periodicity. It may be claimed that various methylation pathways can play important roles in stress response reactions and rearrangements of their resistance, whereas in alternative “to run or to fight” these organisms choose “fighting” at all levels of organization. A number of last investigations show some changes in level and pattern of DNA methylation under biotic [3,4] and different forms of abiotic stress—dryness [3], salinization [3,4,5,6], radiation exposures with various dose rates [7,8,9] and duration [8,10]
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