Antiquity and Function of CASTOR and POLLUX, the Twin Ion Channel-Encoding Genes Key to the Evolution of Root Symbioses in Plants

被引：50

作者：

Chen, Caiyan ^{[1
]}

Fan, Cui ^{[1
]}

Gao, Muqiang ^{[1
]}

Zhu, Hongyan ^{[1
]}

机构：

[1] Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA

来源：

PLANT PHYSIOLOGY | 2009年 / 149卷 / 01期

基金：

美国国家科学基金会;

关键词：

ARBUSCULAR MYCORRHIZAL FUNGI; DEPENDENT PROTEIN-KINASE; DNA INSERTIONAL MUTAGENESIS; MEDICAGO-TRUNCATULA; LOTUS-JAPONICUS; RECEPTOR KINASE; NODULE DEVELOPMENT; NITROGEN-FIXATION; CALCIUM SPIKING; NODULATION;

D O I：

10.1104/pp.108.131540

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Root symbioses with arbuscular mycorrhizal fungi and rhizobial bacteria share a common signaling pathway in legumes. Among the common symbiosis genes are CASTOR and POLLUX, the twin homologous genes in Lotus japonicus that encode putative ion channel proteins. Here, we show that the orthologs of CASTOR and POLLUX are ubiquitously present and highly conserved in both legumes and nonlegumes. Using rice (Oryza sativa) as a study system, we employ reverse genetic tools (knockout mutants and RNA interference) to demonstrate that Os-CASTOR and Os-POLLUX are indispensable for mycorrhizal symbiosis in rice. Furthermore, a cross-species complementation test indicates that Os-POLLUX can restore nodulation, but not rhizobial infection, to a Medicago truncatula dmi1 mutant.

引用

页码：306 / 317

页数：12

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