The synthesis of insect-specific neurotoxin gene tox34 and acquirement of transgenic tobacco

文献类型： 外文期刊

第一作者： Mao, LQ

作者： Mao, LQ;Guo, SD

作者机构：

关键词： insect-specific neurotoxin;mite;tox34 gene;transgenic tobacco

期刊名称：ACTA BOTANICA SINICA （ 影响因子：0.599； ）

ISSN： 0577-7496

年卷期： 1999 年 41 卷 11 期

页码：

收录情况： SCI

摘要： A 762 bp mite (Pyemotes tritici) insect-specific neurotoxin tox34 gene fragment encoding mature protein was fully modified based on plant gene codon usage. tox34 was inserted into bacterial expression vector pBV221. Electrophoresis of protein mixture extracted from the bacteria treated with heat-induction showed that specific protein bands migrated with apparent molecular weight of 32 similar to 33 kD in denaturing gels. Tox34 was inserted into plant high-expression vector and then transferred into tobacco (Nicotiana tabacum L. cv. SR1) using the Agrobacterium tumefaciens (Smith et Tomnsend) Conn binary vector system, followed by the obtainment of the transgenic tobacco plants. The PCR Southern blot assay indicated that the intact toxin gene was integrated into the tobacco genome. GUS assay of transgenic seedling roots showed positive results. The feeding trail of transgenic plants using bollworms (Heliothis armigeva Hubner) manifested strong toxity to low-star bollworm larvae.

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