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<p>Autophagy plays an important role in regulating the development of rice endosperm cells. In this study, to investigate the possible relationship between ascorbic acid (Asc) and autophagy in the process of rice endosperm development, we hypothesized that altered endogenous Asc levels would influence autophagic activity, thereby affecting nitrogen remobilization and grain quality in rice. To test this, the distribution and number of autophagosomes/autophagy-related structures in mesophyll cells and endosperm cells, the gene transcript abundances related to senescence and autophagy, and the enzyme activity and gene transcript abundances related to nitrogen metabolism were analyzed. The results showed that the altered levels of Asc lead to a change in the expression of senescence and autophagy associated genes, and Asc deficiency decreases the number of autophagosomes/autophagy-related structures in rice leaf mesophyll and endosperm cells, while higher Asc level increases them. Meanwhile, Asc also affects the nitrogen metabolism in rice grains by affecting the activities of key enzymes for nitrogen metabolism.</p>

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The formation of autophagosomes in the development process of rice endosperm is affected by endogenous ascorbic acid

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • Le Yu,
  • Mengwei Chen,
  • Haoran Yan,
  • Zeliang Ouyang,
  • Xinyu Liu,
  • Sitong Lin,
  • Yixuan Tang,
  • Zhipeng Xu,
  • Chunyu Liu,
  • Peiyi Chen,
  • Liping Zhou,
  • Yonghai Liu

摘要

Autophagy plays an important role in regulating the development of rice endosperm cells. In this study, to investigate the possible relationship between ascorbic acid (Asc) and autophagy in the process of rice endosperm development, we hypothesized that altered endogenous Asc levels would influence autophagic activity, thereby affecting nitrogen remobilization and grain quality in rice. To test this, the distribution and number of autophagosomes/autophagy-related structures in mesophyll cells and endosperm cells, the gene transcript abundances related to senescence and autophagy, and the enzyme activity and gene transcript abundances related to nitrogen metabolism were analyzed. The results showed that the altered levels of Asc lead to a change in the expression of senescence and autophagy associated genes, and Asc deficiency decreases the number of autophagosomes/autophagy-related structures in rice leaf mesophyll and endosperm cells, while higher Asc level increases them. Meanwhile, Asc also affects the nitrogen metabolism in rice grains by affecting the activities of key enzymes for nitrogen metabolism.