Open Access
Article

Root exudates of transgenic cotton and their effects on Fusarium oxysporum

Xiao-gang Li1,2,3,Qin Wei2,Biao Liu2,*,Mohammad-Saiful Alam4,Xing-xiang Wang1,Wenjing Shen2,Zheng-min Han3
1
China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
2
Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of China, Nanjing 210042, China
3
College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China
4
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
DOI: 10.2741/4134 Volume 18 Issue 2, pp.725-733
Published: 01 January 2013
*Corresponding Author(s):  
Biao Liu
E-mail:  
liubiao@pku.org.cn
Abstract

The components of the root exudates from two transgenic insect-resistant cotton lines and their parental cotton lines, and their effects on the growth of Fusarium oxysporum were investigated. The results demonstrated that the resistance of transgenic insect-resistant cotton to F. oxysporum was significantly reduced compared with their parental lines. Likewise, the root exudates from transgenic insect-resistant cotton significantly promoted the spore germination and mycelial growth of cotton F. oxysporum. The types of compounds found in the root exudates of transgenic insect-resistant cotton were similar to those of the parental cotton, but the composition and relative content of the compounds were different. The type and content of the fatty acids and esters were significantly reduced in the root exudates of the transgenic insectresistant cotton, as were certain specific materials, whereas several alkanes were increased. The inhibition of the soil- borne pathogen F. oxysporum caused by the root exudates from the transgenic insect-resistant cotton was decreased compared with the parental cotton. This result provides a scientific basis for the decline in disease resistance in transgenic insect-resistant cotton.


Key words

Transgenic insect-resistant cotton, Root exudates, Fusarium oxysporum, Disease resistance, GC-MS

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Xiao-gang Li, Qin Wei, Biao Liu, Mohammad-Saiful Alam, Xing-xiang Wang, Wenjing Shen, Zheng-min Han. Root exudates of transgenic cotton and their effects on Fusarium oxysporum. Frontiers in Bioscience-Landmark. 2013. 18(2); 725-733.