A rice calcium- and calmodulin-dependent protein kinase restores nodulation to a legume mutant

被引:53
作者
Godfroy, O [1 ]
Debellé, F [1 ]
Timmers, T [1 ]
Rosenberg, C [1 ]
机构
[1] CNRS, INRA, Lab Interact Plantes Microorgan, F-31326 Castanet Tolosan, France
关键词
rhizobium; symbiosis;
D O I
10.1094/MPMI-19-0495
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The Medicago truncatula DMI3 gene encodes a calcium- and calmodulin-dependent protein kinase (CCaMK) that is necessary for the establishment of both rhizobial and mycorrhizal symbioses. The two symbiotic signaling pathways diverge downstream of DMI3; therefore, it has been proposed that legumes have evolved a particular form of CCaMK, acting like a switch able both to discriminate between rhizobial and mycorrhizal calcium signatures and to trigger the appropriate downstream signaling pathway. To test this hypothesis, we examined whether a CCaMK gene from a nonlegume species was able to restore the rhizobial symbiotic properties of a M. truncatula dmi3 mutant. Our results show that a CCaMK gene from rice can restore nodule formation, indicating that CCaMKs from nonlegumes can interpret the calcium signature elicited by rhizobial Nod factors and activate the appropriate downstream target. The nodules did not contain bacteria, which suggests that DMI3 is also involved in the control of the infection process.
引用
收藏
页码:495 / 501
页数:7
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