NRT/PTR载体对于葡萄糖酸盐防御化合物的转移到种子中至关重要
Hussam Hassan Nour-Eldin1, Tonni Grube Andersen, Meike Burow
1Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 1871Frederiksberg C, Denmark.
Nature
|August 7, 2012
概括
研究人员确定GTR1和GTR2是将关键的葡萄糖酸盐,关键的植物防御化合物转移到Arabidopsis的种子中的关键载体. 这一发现为控制农业中植物防护化合物分配提供了潜力.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物生理学 植物生理学
- 生物化学 生物化学
背景情况:
- 像葡萄糖酸盐这样的植物防御化合物对于保护有价值的组织至关重要.
- 这些化合物的长途运输机制在分子层面上仍然基本上没有特征.
- 阿拉比多普西斯 (Arabidopsis thaliana) 是研究植物防御和转移过程的模型生物.
研究的目的:
- 为了确定负责植物中长距离葡萄糖酸盐运输的分子成分.
- 描述新型葡萄糖酸盐载体的功能和局部.
- 探索了解葡萄糖酸盐转位的农业影响.
主要方法:
- 阿拉比多普西斯突变的遗传分析 (gtr1 gtr2双突变).
- 使用生物化学测试 (质子依赖,高亲和度) 进行载体活动的表征.
- 亚细胞局部化研究以确定血关联.
主要成果:
- 鉴定并描述了GTR1和GTR2作为葡萄糖酸盐特异性载体.
- 在gtr1 gtr2双突变体中,种子葡萄糖酸盐积累的严重缺陷.
- 突变植物在源组织 (叶子,壁) 中过度积累了葡萄糖酸盐.
- GTR1和GTR2局部存在于血上,对于体载荷至关重要.
结论:
- GTR1和GTR2对于从来源到沉没组织的葡萄糖酸盐长途运输至关重要.
- 这些载体有助于将葡萄糖酸盐加载到体中进行转移.
- 鉴定GTR1和GTR2为操纵农业中植物防护化合物分配提供了一个目标.
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