摘要
研究了转Bt基因棉花与土壤系统中Bt毒素的分布.结果表明,两种转Bt基因棉花地上部(叶片、茎秆)的毒素表达量(103.5～134.1 ng·g-1)显著高于地下部分(根系)(44.7～21.2ng·g-1),土壤中Bt毒素总量可通过转基因棉花地上部分秸秆的处理得到控制;Bt毒素在转Bt基因棉花根系分泌物中的含量极低,如果控制Bt毒素的其它导入来源,将显著降低转Bt基因作物释放中因Bt毒素导入而引发的对土壤生态系统的扰动.
This study showed that the amounts of Bt toxin expressed in transgenic Bt cotton leaves and stems （ 103.5 - 134.1 ng· g^-1 ） were rather higher than those expressed in transgenic Bt cotton roots （ 44.7 - 21.2 ng· g^-1 ）, indicating that total amount of soil Bt toxin introduced by transgenic Bt cotton could be decreased through treating its above-ground biomass. In comparing with the amount of Bt toxin expressed in transgenic Bt cotton plant, that expressed in its root exudates was rather lower, showing that the effects of plant Bt toxin on soil ecosystem would be limited if other sources of Bt toxin introduced into soil were controlled.
出处
《应用生态学报》
CAS
CSCD
北大核心
2005年第9期1765-1768,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(40101016)
中国科学院沈阳应用生态研究所知识创新工程重大资助项目(SCXZD0104-02).
关键词
BT毒素
转基因棉花
土壤
分布
Bt toxin, Transgenic cotton, Soil, Distribution.
