转harpin_(Xooc)蛋白编码基因hrf2对油菜抗菌核病的影响

【目的】尝试利用转基因方法提高油菜抗病性。【方法】将来自水稻细菌性条斑病菌(Xanthomonas oryzae pv.oryzicola)编码harpinXooc蛋白的hrf2基因插入植物表达载体pCAMBIA1301中,构建了植物重组表达质粒pCAMBIA1301-hrf2。由根癌农杆菌LBA4404介导,将重组表达质粒pCAMBIA1301-hrf2转化甘蓝型油菜杨油4号子叶节。【结果】获得了抗潮霉素的再生转基因油菜植株,经PCR,RT-PCR和GUS染色检测证明hrf2基因已整合到油菜基因组中。抗病性鉴定结果表明,转基因油菜对油菜菌核病有较好的抗性,在转基因植株叶片上油菜菌核病菌菌丝的生长受到明显抑制。【结论】利用农杆菌转化法可将hrf2基因导入油菜基因组中,并使转基因油菜对菌核病的抗性提高。

Transgenic Rape with hrf2 Gene Encoding Harpin_(Xooc) Resistant to Sclerotinia sclerotinorium

The objective of this study was to increase the resistance of rape using the method of transformation. The gene hrf2 derived from Xathomonas oryzae pv. oryzicola encoding harpinxooc protein was constructed into transgenic vector pCAMBIA1301. The cotyledonal petiole segments from rapeseed variety Yangyou 4 were infected by Agrobacterium tumefaciens strain LBA4404/pCAMBIA1301-hrf2. Hygromycin-resistant green shoots were obtained. Successful integration of the foreign gene into the genome of the rapeseed variety Yangyou 4 was confirmed by PCR, RT-PCR, and β-glucuronidase analyses. Disease bioassays of transgenic plants revealed an improved resistance of transgenic plants to Rape sclerotiniose. In brief, the hrf2 gene can be transferred into rape using the method of Agrobacterium-mediated transformation, which increased the resistance to Sclerotinia sclerotinorium in the transgenic plant.

转Harpin_(Xooc)蛋白编码基因hrf2大豆的胞囊线虫病1号小种抗性鉴定

Harpin蛋白能激活植物的多种防卫通路,从而使植物产生对逆境的广谱抗性。hrf2编码Harpin_(Xooc)蛋白,具有与Harpin蛋白类似的功能。对转hrf2基因的大豆进行抗胞囊线虫病鉴定,结果表明:转hrf2基因大豆的2个株系的单株胞囊线虫数均极显著低于受体植株天隆一号,说明hrf2能够提高大豆对胞囊线虫病1号小种的抗性。