植物根系对氮胁迫的形态学响应

被引：20

作者：

胡廷章 ^{[1
,2
]}

陈国平 ^{[1
]}

胡宗利 ^{[1
]}

屈霄霄 ^{[1
]}

机构：

[1] 重庆大学生物工程学院

[2] 重庆三峡学院生物系

来源：

生态学报 | 2010年 / 30卷 / 01期

基金：

中国博士后科学基金;

关键词：

植物根系; 氮; 氮供给; 硝酸盐; L-谷氨酸盐; 形态学响应;

D O I：

暂无

中图分类号：

Q944 [植物形态学];

学科分类号：

071001 [植物学];

摘要：

NO3-不仅是植物营养的主要N源,而且也是调节植物新陈代谢和生长发育的信号。植物根系对N供给的形态学适应表现在4个方面:(1)植物侧根(LR)响应体外硝酸盐的局部刺激而伸长,AtNRT1.1在侧根响应体外硝酸盐的局部刺激中,作用于ANR1 MADS box基因上游;(2)植物LR分裂组织活动受到组织中高浓度的硝酸盐抑制,RNA结合蛋白FCA是高硝酸盐/ABA诱导侧根发育抑制的信号传输途径成分;(3)植物侧根的发生受到体外高C∶N比抑制,AtNRT2.1参与高C∶N比抑制侧根发生;(4)植物根响应体外L-谷氨酸盐的刺激而分枝,初生根的生长受到体外L-谷氨酸盐抑制,植物根系对L-谷氨酸盐的响应可能与一种同源于哺乳动物离子型谷氨酸盐受体的植物蛋白的感知作用有关。植物根形态对N供给的响应具有重要生理和生态意义。

引用

页码：205 / 211

页数：7

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