title: Root exudates of transgenic cotton and their effects on Fusarium oxysporum.
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 insect-resistant 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.
authors.affiliation: Institute of Environmental Sciences, Ministry of Environmental Protection of China, Nanjing 210042, China.
authors.forename: Xiao-gang
authors.initials: XG
authors.lastname: Li
authors.forename: Qin
authors.initials: Q
authors.lastname: Wei
authors.forename: Biao
authors.initials: B
authors.lastname: Liu
authors.forename: Mohammad-Saiful
authors.initials: MS
authors.lastname: Alam
authors.forename: Xing-xiang
authors.initials: XX
authors.lastname: Wang
authors.forename: Wenjing
authors.initials: W
authors.lastname: Shen
authors.forename: Zheng-min
authors.initials: ZM
authors.lastname: Han
mesh_terms: D005122:Exudates and Transudates / Q000737:chemistry*; D005670:Fusarium / Q000187:drug effects; D018525:Germination / Q000187:drug effects; D003368:Gossypium / Q000235:genetics*; D010572:Pest Control, Biological / Q000379:methods*; D010935:Plant Diseases / Q000517:prevention & control*; D018517:Plant Roots / Q000737:chemistry*; D030821:Plants, Genetically Modified / Q000737:chemistry*; D013172:Spores, Fungal / Q000187:drug effects / Q000502:physiology