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黑松与松材线虫和拟松材线虫互作早期超氧自由基研究

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

Issue:
2008年06期
Page:
24-28
Column:
研究论文
publishdate:
2008-11-30

Article Info:/Info

Title:
Study on superoxide anion of Pinus thunbergii infected by Bursaphelenchus xylophilus and B. mucronatus in the earlier interaction
Article ID:
1000-2006(2008)06-0024-05
Author(s):
LIU JieWU Xiao-qin* HE Long-xi YING Chen-xi
Nanjing Forestry University, The Key Laboratory of the Pest Prevention and Control of the Jiangsu Province, Nanjing 210037, China
Keywords:
Bursaphelenchus xylophilus B. mucronatus Pinus thunbergii Superoxide anion Superoxide dismutase
Classification number :
S763.1
DOI:
10.3969/j.jssn.1000-2006.2008.06.006
Document Code:
A
Abstract:
The effect of superoxide anion( O2-) at the initial time of pine wilt disease was studied in this paper. Japanese black pine seedlings (Pinus thunbergii) of 2 years old were inoculated by three different kinds of virulent strains pine wood nematodes (PWN, high virulent and mild virulent strain of Bursaphelenchus xylophilus and avirulent strain of B. raucronatus). The stem and leaf of samples were taken to determine the O2- content and superoxide dismutase (SOD) activity in P. thunbergii at 4,12,24,48,72,96 and 120 h after inoculation respectively. It showed that O2- and SOD in P. thunbergii which were inoculated with three different kinds of virulent strains PWN displayed distinct different changes. All treated seedings brought forth the first O2- burst in 12 h. The reverse correlation between O2- content and virulent strain could be founded in the pine stem. The second stage of O2- increase in leaf of the seeding inoculated with avirulent strain of B. mucronatus was earlier than that inoculated with high virulent B. xylophilus. There was a biphasic SOD burst in the pine after it inoculated with avirulent strain of B. mucronatus, while the pine inoculated with high virulent PWN only had single SOD burst. After the first increasing stage of Mn -SOD(24 h) ,the Mn -SOD content in seeding inoculated B. mucronatus was higher than that inoculated with high virulent PWN. The rising of O2- content was coincident with SOD. Both of them had same integrative trend. However, SOD had slower change than O2- . So it was indicated that O2- was an important juncture in pine wilt disease resistance signaling pathways.

References

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Last Update: 2013-05-20