Inhibition of Auxin Signaling in Frankia Species-Infected Cells in Casuarina glauca Nodules Leads to Increased Nodulation

被引：16

作者：

Champion, Antony ^{[1
,2
,3
]}

Lucas, Mikael ^{[1
,2
]}

Tromas, Alexandre ^{[1
,2
,3
]}

Vaissayre, Virginie ^{[1
]}

Crabos, Amandine ^{[1
,2
,3
]}

Diedhiou, Issa ^{[1
,2
,3
]}

Prodjinoto, Hermann ^{[1
,2
,3
]}

Moukouanga, Daniel ^{[1
,2
]}

Pirolles, Elodie ^{[1
,2
]}

Cissoko, Maimouna ^{[2
,3
]}

Bonneau, Jocelyne ^{[1
,2
]}

Gherbi, Hassen ^{[1
,2
]}

Franche, Claudine ^{[1
,2
]}

Hocher, Valerie ^{[1
,2
]}

Svistoonoff, Sergio ^{[1
,2
,3
]}

Laplaze, Laurent ^{[1
,2
,3
]}

机构：

[1] Univ Montpellier 2, Inst Rech Dev, Unite Mixte Rech Divers Adaptat & Dev Plantes, F-34394 Montpellier 5, France

[2] Univ Cheikh Anta Diop, Inst Senegalais Rech Agr, Inst Rech Dev, Ctr Rech Bel Air,Lab Mixte Int Adaptat Plantes &, Dakar, Senegal

[3] Univ Cheikh Anta Diop, Inst Senegalais Rech Agr, Inst Rech Dev, Ctr Rech Bel Air,Lab Commun Microbiol, Dakar, Senegal

来源：

PLANT PHYSIOLOGY | 2015年 / 167卷 / 03期

关键词：

ACTINORHIZAL SYMBIOSES; ALLOCASUARINA-VERTICILLATA; NITROGEN-FIXATION; GENETIC-BASIS; EXPRESSION; ORIGINS; AUTOREGULATION; PERCEPTION; FLAVONOIDS; CYTOKININ;

D O I：

10.1104/pp.114.255307

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Actinorhizal symbioses are mutualistic interactions between plants and the soil bacteria Frankia spp. that lead to the formation of nitrogen-fixing root nodules. The plant hormone auxin has been suggested to play a role in the mechanisms that control the establishment of this symbiosis in the actinorhizal tree Casuarina glauca. Here, we analyzed the role of auxin signaling in Frankia spp.-infected cells. Using a dominant-negative version of an endogenous auxin-signaling regulator, INDOLE-3-ACETIC ACID7, we established that inhibition of auxin signaling in these cells led to increased nodulation and, as a consequence, to higher nitrogen fixation per plant even if nitrogen fixation per nodule mass was similar to that in the wild type. Our results suggest that auxin signaling in Frankia spp.-infected cells is involved in the long-distance regulation of nodulation in actinorhizal symbioses.

引用

页码：1149 / 1157

页数：9

共 48 条

[1] Silencing of the chalcone synthase gene in Casuarina glauca highlights the important role of flavonoids during nodulation [J].