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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (12): 171-180.DOI: 10.11686/cyxb2023068

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Effects of different salt stresses on triticale seed germination

Chen MENG1,2,3(), Xue-li LU1,2,3, Ju-ying WANG2, Yun-chong WEI4, Cheng-sheng ZHANG1,2,3, Yi-qiang LI1,2,3, Zong-chang XU1,2,3()   

  1. 1.Marine Agriculture Research Center,Tobacco Research Institute of Chinese Academy of Agricultural Sciences,Qingdao 266100,China
    2.National Center of Technology Innovation for Comprehensive Utilization of Saline-alkali Land,Dongying 257345,China
    3.Qingdao Key Laboratory of Coastal Saline-alkali Land Resources Mining and Biological Breeding,Qingdao 266100,China
    4.College of Agriculture,Qingdao Agricultural University,Qingdao 266109,China
  • Received:2023-03-06 Revised:2023-04-21 Online:2023-12-20 Published:2023-10-18
  • Contact: Zong-chang XU

Abstract:

Soil salinization is an important factor that restricts agricultural production. Triticale has high yields and shows strong stress resistance, so it has the potential to improve saline-alkali land. In this study, triticale seeds were treated with five kinds of salts (NaCl, KCl, Na2SO4, MgSO4, NaHCO3) at different concentrations (10, 25, 50, 100 and 200 mmol·L-1) and compound salt solutions (NaHCO3∶NaCl∶Na2SO4=1∶15∶84) at concentrations of 0.05%, 0.15%, 0.30%, 0.60% and 1.20% (w/v). The germination rate, germination potential, germination index, vigor index, seedling length, and root length of triticale germinating seeds and seedlings under different salt stresses were analyzed. The salt tolerance of triticale under different salt stresses was comprehensively evaluated by a principal component analysis and membership function analysis. The results show that the germination rate, germination potential, germination index, and vigor index of triticale seeds decreased gradually as the concentration of each salt increased, and treatment with high concentrations of salts significantly inhibited the germination of the triticale seeds. The seedling length and root length of triticale seedlings also showed a decreasing trend with increasing salt concentrations. Among the salts, NaHCO3 had the strongest inhibitory effect. The results of the principal component analysis showed that the main indicators for evaluating the salt tolerance of triticale were germination rate, germination index, and root length. The ranking of membership function values showed that triticale had relatively high tolerance to mixed salt treatments and the lowest tolerance to NaHCO3.

Key words: triticale, salt stress, analysis of salt tolerance