Plant physiology, biochemistry and molecular biology

Effect of Drought Stress and Rewatering on Growth and Physiological Characteristics of Machilus chekiangensis Seedlings

  • 蓝Lai-Jiao ,
  • LIN Wei-Tong ,
  • MING Yi ,
  • LIU Yu-Yin ,
  • CUI Si-Ming ,
  • ZHENG Ming-Xuan ,
  • WU Yong-Bin
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  • (1.College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, Guangdong China; 2.Lingnan Comprehensive Surveying and Designing Institute of Guangdong Province, Guangzhou 510520, Guangdong China)

Received date: 2017-05-15

  Revised date: 2017-07-09

  Online published: 2017-09-30

Abstract

The drought resistance of Machilus chekiangensis seedlings was identified and evaluated using simulated drought stress and rehydration in green house. The results were as follows: with the increase of stress time, soil water content, relative leaf water content, growth amount of net height and net ground diameter of seedlings decreased significantly. SP content, SOD activity, Chl a, Chl b, Car contents and Chl a/b increased at first, and then declined under severe drought, while Pro content and MDA content increased throughout the whole process. After rewatering, soil water content, net height of seedlings and SOD activity treated 5 days was basically restored to CK, and SOD activity treated during 10—30 days was higher than that of CK. The relative leaf water content, net ground diameter, SP content and Pro content were significantly restored to CK. MDA content decreased and the value of each drought stress was higher than that of CK. Chl a, Chl b, Car contents and Chla/b were all smaller, and the peak of each index also became smaller. Through analyzing the variation of these indexes, it was concluded that M. chekiangensis seedlings had a certain drought tolerance.

Cite this article

蓝Lai-Jiao , LIN Wei-Tong , MING Yi , LIU Yu-Yin , CUI Si-Ming , ZHENG Ming-Xuan , WU Yong-Bin . Effect of Drought Stress and Rewatering on Growth and Physiological Characteristics of Machilus chekiangensis Seedlings[J]. Subtropical Plant Science, 2017 , 46(03) : 219 -224 . DOI: 10.3969/j.issn.1009-7791.2017.03.004

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