+优先离子载体HKT1;1调解了蓝中的盐分耐受性
Huifang Song1, Yibo Cao1, Xinyan Zhao1
1State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Forest Silviculture and Conservation of the Ministry of Education, Research & Development Center of Blueberry, College of Forestry, Beijing Forestry University, Beijing 100083, China.
一个关键的基因,VcHKT1;1,帮助高布什蓝植物通过排除叶子中的 (Na+) 来容忍盐. 这个基因的自然变异可以用来培育更耐盐的蓝品种.
科学领域:
- 植物科学 植物科学
- 分子生物学分子生物学
- 农业科学 农业科学
背景情况:
- 土壤盐度是高灌木蓝 (Vaccinium corymbosum) 增长和生产率的一个主要限制.
- 叶子 (Na+) 积累与盐分耐受性有关,但排除机制尚不清楚.
研究的目的:
- 确定负责蓝中叶子Na+排除的基因和机制.
- 确定候选基因在赋予盐耐受性方面的作用.
主要方法:
- 对耐盐 ("杜克") 和敏感 ("甜心") 的蓝品种进行比较分析.
- 转录简介用于识别候选基因,重点关注高亲和度K + 载体 (HKT) 家族成员.
- 在Arabidopsis thaliana中VcHKT1;1的异质表达和在蓝中VcHKT1;1的反意义表达.
主要成果:
- 鉴定了VcHKT1;1,一种Na+偏好转运基因,在根石骨中表达高.
- 在阿拉比多普西斯的VcHKT1;1表达救了盐过敏.
- 降低的VcHKT1;1水平增加了木汁和叶子中的Na+,证实了它在从木中提取Na+中的作用.
- 一个8-bp促进体插入与更高的VcHKT1;1转录和增强的盐耐受性相关联.
结论:
- VcHKT1;1通过从树叶汁中提取Na+来积极促进叶子Na+的排斥.
- 在VcHKT1;1中的自然遗传变异,特别是促进物插入,是培育耐盐蓝品种的宝贵资源.
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