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Acta Prataculturae Sinica ›› 2026, Vol. 35 ›› Issue (1): 130-139.DOI: 10.11686/cyxb2025067

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Effects of different concentrations of silicon on the cold resistance of Elymus sibiricus seedlings

Ruo-fei WANG(), Xin-zhe LI, Qi-ce LI, Jia-yi ZHANG, Bei-jun WANG, Wen-gang XIE()   

  1. College of Grassland Agricultural Science and Technology of Lanzhou University,State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems,Lanzhou 730020,China
  • Received:2025-03-04 Revised:2025-04-15 Online:2026-01-20 Published:2025-11-13
  • Contact: Wen-gang XIE

Abstract:

In this study, we evaluated the effects of nano-silicon (nano-Si) at varying concentrations (0, 50, 100, 150, and 200 mg·L-1) on the cold resistance of Elymus sibiricus during the seedling stage. When seedlings were subjected to a cold treatment, those treated with nano-Si showed significantly enhanced root elongation, compared with that of the control group, but no difference in their plant height. An exhaustive analysis of cold-resistance traits revealed that, compared with the control group, E. sibiricus seedlings treated with 200 mg·L-1 nano-silicon showed markedly higher values for root length, proline content, and chlorophyll content (increased by 63.2%, 178.6%, and 15.6%, respectively), and lower values for several stress-related parameters. Specifically, compared with the control group, the E. sibiricus seedlings treated with 200 mg·L-1 nano-Si had lower relative conductivity, malondialdehyde content, and abscisic acid content (17.5%, 3.88%, and 2.23% lower, respectively). These results indicate that nano-Si regulates cell osmotic pressure, maintains photosynthetic efficiency, and modulates plant hormone levels, thereby preserving physiological metabolism under low-temperature stress and improving cold resistance. The results of this study provide theoretical support for the application of nano-Si to increase the cold resistance of forage crops.

Key words: nano-silicon, Elymus sibiricus, seedling stage, cold resistance