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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (6): 186-202.DOI: 10.11686/cyxb2022303

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Accumulation and functions of polyamines in plants under drought stress

Wen-juan WANG(), Shang-li SHI(), Long HE, Bei WU, Chan-chan LIU   

  1. College of Grassland Science,Gansu Agricultural University,Key Laboratory of Grassland Ecosystem of Ministry of Education,Sino-U. S. Centers for Grazing Land Ecosystem Sustainability,Lanzhou 730070,China
  • Received:2022-07-26 Revised:2022-09-01 Online:2023-06-20 Published:2023-04-21
  • Contact: Shang-li SHI

Abstract:

Drought stress is one of the major abiotic stresses that causes reductions in crop yields. Polyamines are a class of low molecular weight aliphatic nitrogenous bases in plants. They have strong biological activity and are involved in a range of physiological processes such as plant organogenesis, embryogenesis, bud differentiation, leaf senescence, pollen tube growth, and fruit development and ripening. They also play important roles in plants under drought stress. In this paper, we review research on the anabolism and catabolism of polyamines, their functions under abiotic stress, and differences in their accumulation among species/varieties of plants under drought stress. We also discuss studies on the effects of exogenous polyamines and those using transgenic approaches to elucidate the roles of polyamines at the physiological level. The body of research on polyamines has shown that they enhance drought resistance by improving plant growth and development, photosynthetic capacity, accumulation of osmoregulatory substances, and antioxidant capacity, and that they participate in signal transduction at the molecular level in plants under drought stress.

Key words: plants, polyamines, accumulation, exogenous addition, gene regulation, signal transduction, drought resistance