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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (1): 62-70.doi: 10.11924/j.issn.1000-6850.casb2022-0002

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Effects of Compound Saline-alkali Stress on Physiological and Biochemical Indexes of Table Grapes

LU Qianqian(), FENG Linjiao, WANG Shuang, GULIZHATI·Baoerhan , CHU Ren, ZHOU Long()   

  1. College of Horticulture, Xinjiang Agricultural University, Urumqi 830052
  • Received:2022-01-04 Revised:2022-04-14 Online:2023-01-05 Published:2022-12-27
  • Contact: ZHOU Long E-mail:2214466796@qq.com;Zhoulong2004@126.com

Abstract:

To screen new introduced table grape varieties with saline-alkali tolerance, 10 grape varieties were used as materials to study the variation characteristics of physiological and biochemical indexes of grapes after 30 days of compound saline-alkali stress of different concentrations (0.29%, 0.58%, and 0.87% of the dry weight of pot soil). The correlation analysis of all indexes was carried out, and the principal component analysis was used to comprehensively evaluate the saline-alkali tolerance of the grape varieties. The results showed that with the increase of saline-alkali concentration, the root activity and leaf relative water content decreased gradually, the relative conductivity and the content of malondialdehyde and proline increased gradually, and the superoxide dismutase activity showed two trends of first increase then decrease or continuous increase. Correlation analysis showed that malondialdehyde content in leaves, malondialdehyde content in roots and proline content in leaves had extremely significantly and positively pairwise correlation. Superoxide dismutase activity in roots was significantly and negatively correlated with malondialdehyde content and superoxide dismutase activity in leaves. Three principal components with eigenvalues greater than 1 were extracted by principal component analysis, and the cumulative contribution rate was 77.99%. Finally, the order of saline-alkali tolerance of the 10 grape varieties from strong to weak was determined as ‘Zitianwuhe’, ‘Blackcrunchy Seedless’, ‘Hutai 8’, ‘Zaoxiawuhe’, ‘Silk Road Red Rose’, ‘Shine Muscat’, ‘Crimson Rose’, ‘Summer Black’, ‘Sweet Sapphire’, and ‘Wagamichi’.

Key words: table grapes, compound saline-alkali stress, physiological and biochemical responses, principal component analysis, correlation analysis

CLC Number: