›› 2016, Vol. 28 ›› Issue (10): 1687-1694.DOI: 10.3969/j.issn.1004-1524.2016.10.09

• Horticultural Science • Previous Articles     Next Articles

Effect of salicylic acid and calcium chloride on physiological characteristics of tomato seedlings under drought stress

ZHANG Dong-ye, ZHAO Ting-ting, LI Jing-fu, JIANG Jing-bin, ZHANG He, CHEN Xiu-ling, XU Xiang-yang*   

  1. College of Horticulture, Northeast Agricultural University, Harbin 150030, China
  • Received:2016-01-28 Online:2016-10-15 Published:2016-11-20

Abstract: Dongnong 11537 tomato seedlings were applied exogenously with different concentrations of salicylic acid (SA) and calcium chloride (CaCl2) for 3 d and then treated by drought stress. Plant phenotypes were observed and physiological characteristics were investigated, effects of SA and CaCl2 upon drought stress were compared and the optimal concentrations of SA and CaCl2 were screened. The results showed that compared with control group, under drought stress, appropriate application of SA and CaCl2 could effectively slow down the reduction of relative water content of tomato leaves, suppress the increase of relative conductance rate and malondialdehyde content, increase SPAD value, contents of proline and soluble protein, stimulate the activities of superoxide dismutase, catalase and peroxidase, indicating that appropriate application of SA and CaCl2 could effectively improve drought resistance of tomato seedlings. 0.3 mmol·L-1 SA and 10 mmol·L-1 CaCl2 had the optimal effect for improving drought tolerance of tomato seedlings. To summarize, the effect of 0.3 mmol·L-1 SA was more prominent.

Key words: salicylic acid, calcium chloride, tomato, drought stress, physiological characteristics

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