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比拉底白刺苗期抗旱性分析(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2015年06期
Page:
51-55
Column:
研究论文
publishdate:
2015-11-30

Article Info:/Info

Title:
Drought resistance analysis of Nitraria billardieri seedlings
Article ID:
1000-2006(2015)06-0051-05
Author(s):
LU Lu1 ZHANG Jingbo2 CHEN Jinhui1 ZHOU Yanwei1 CHENG Tielong1*
1.Key Laboratory of Forest Genetics and Biotechnology, Ministry of Education, College of Forestry, Nanjing Forestry University, Nanjing 210037, China;
2.The Experimental Center for Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, China
Keywords:
Nitraria billardieri seedling physiological indexes determination drought resistance analysis
Classification number :
S718; Q945.78
DOI:
10.3969/j.issn.1000-2006.2015.05.010
Document Code:
A
Abstract:
The drought resistance research of Australia desert plants Nitraria billardieri was focused by observing morphological changes and analyzing variation trends of relative water content(RWC), enzymatic activity of peroxidase(POD), malondiadehyde(MDA), and proline(Pro)under drought stress simulated by 100 mmol/L mannitol solution. The results showed that the leaves turned yellow under drought stress and withered gradually from base to top, presumably by protecting the vitality of buds to adapt the arid environments. The relative water content kept relatively stable at early stage and then decreased gradually. The POD activity increased slowly at first and then increased rapidly. Free Pro concentration had been rising during the treatment. MDA content increased at first and then decreased. According to the statistical analysis, both POD and free Pro increased obviously compared with control group. They reduced plasma membrane peroxidation and kept the cell integrity which showed drought resistance of Nitraria billardieri. MDA concentration did not change significantly, this indicated that cytoplasmic membrane system was protected and did not seriously suffer from reactive oxygen free radical attacking under drought stress probably caused by increased concentration of POD and free Pro.

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Last Update: 2015-11-30