ÃÞ »¨ ѧ ±¨ Cotton Science 2009£¬21(6)£º488-491
The Effect of CpTI Cotton on Main Diseases and Premature Senescence Abstract£ºThe cowpea trypsin inhibitor gene(CpTI) has been widely used in genetic engineering for more than ten years and has been successfully transferred into cotton( Gossypium hirsutum L.). Widely growing of transgenic plant may be accompanied by ecological effects including changes in diseases those coursed by fungus, bacterial or virus. People have paid more attention on environment risk assessment of transgenic plant recently. Most research on Bt cotton has focused on invasiveness, gene flow to indigenous organisms, development of resistant in target pests, and direct or indirect effects on non-target organisms and ecosystem. But a few studies have been published to evaluate the effects of CpTI on cotton diseases. Four CpTI cotton lines and their contrasts £¨non-CpTI cotton£©were monitored for changes in diseases including seedling disease, Verticillium wilt, latter leaf spot and early senescence in 2006 and 2007.The results showed that the percentage of died seedling coursed by seedling disease of three CpTI cotton lines were lower than that of their contrasts(non- CpTI cotton). Verticillium wilt disease index(ID) of four CpTI cotton lines were lower than that of non- CpTI cotton lines in the end of June and the beginning of July£¨the beginning stage of Verticillium wilt£©,after that changes of Verticillium wilt ID were different among lines and stages.Verticillium wilt ID of CpTI A was remarkably higher than that of its contrast. ID of latter leaf spot and early senescence of four CpTI cotton lines were distinctly higher than that of four non- CpTI cotton lines.
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