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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (8): 202-213.DOI: 10.11686/cyxb2022417

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Studies on the regulation of seed aging by reactive oxygen species and telomeres

Shou-jiang SUN(), Pei-sheng MAO(), Li-ru DOU, Zhi-cheng JIA, Ming SUN, Wen MA, Cheng-ming OU, Juan WANG   

  1. College of Grassland Science and Technology,China Agricultural University,Key Laboratory of Pratacultural Science,Beijing 100193,China
  • Received:2022-10-18 Revised:2023-01-10 Online:2023-08-20 Published:2023-06-16
  • Contact: Pei-sheng MAO

Abstract:

Seeds enable plants to survive in harsh environmental conditions and can transmit genetic information from their parents to the next generation. Seed vigor is an important character in agriculture, which directly affects the field emergence rate and crop yield. However, due to seed aging, seed vigor decreased during storage. In order to effectively protect genetic resources and reduce the huge economic losses caused by seed aging to agricultural production, it is necessary to explore the mechanism of seed aging in order to understand the causes of seed aging and a series of important events that occur in the aging process. During seed storage, high temperature and humidity are the two main factors to accelerate seed aging. The oxidative damage caused by reactive oxygen species (ROS) is the main reason. ROS can interact with any biological macromolecule, leading to protein damage, lipid peroxidation, chromosomal telomere structure abnormality and various cell components damage caused by DNA damage. In addition, ROS may also induce programmed cell death, leading to seed aging. At the initial stage of imbibition, the seeds will repair some damage, but if they cause great damage to key structures, they will fail to repair, and the seeds will lose their vitality permanently, so they cannot germinate normally in a relatively short time. The exact mechanism of seed aging has not been fully studied. Based on this, this study mainly reviewed the generation and elimination of ROS during seed aging, the influence of ROS on biological macromolecules, the response of chromosome telomere system to seed aging, and the research progress of genes related to seed aging, which is of great significance for understanding the causes of seed aging and analyzing the mechanism of seed aging.

Key words: seed aging, reactive oxygen species, oxidative stress, telomeres, protein carbonylation, programmed cell death