Strigolactone inhibition of shoot branching

被引：1681

作者：

Gomez-Roldan, Victoria ^{[2
,3
,4
]}

Fermas, Soraya ^{[1
]}

Brewer, Philip B. ^{[5
]}

Puech-Pages, Virginie ^{[2
,3
,4
]}

Dun, Elizabeth A. ^{[5
]}

Pillot, Jean-Paul ^{[1
]}

Letisse, Fabien ^{[6
]}

Matusova, Radoslava ^{[7
]}

Danoun, Saida ^{[2
,3
,4
]}

Portais, Jean-Charles ^{[6
]}

Bouwmeester, Harro ^{[7
,8
]}

Becard, Guillaume ^{[2
,3
,4
]}

Beveridge, Christine A. ^{[5
,9
]}

Rameau, Catherine ^{[1
]}

Rochange, Soizic F. ^{[2
,3
,4
]}

机构：

[1] Inst JP Bourgin, Genet & Ameliorat Plantes Stn, INRA, UR254, F-78000 Versailles, France

[2] Univ Toulouse 1, F-31326 Castanet Tolosan, France

[3] UPS, F-31326 Castanet Tolosan, France

[4] CNRS, F-31326 Castanet Tolosan, France

[5] Univ Queensland, ARC Ctr Excellence Integrat Legume Res, Brisbane, Qld 4072, Australia

[6] INSA Toulouse, CNRS, UMR5504, UMR792,INRA, F-31400 Toulouse, France

[7] Plant Res Int, NL-6700 AA Wageningen, Netherlands

[8] Univ Wageningen & Res Ctr, Lab Plant Physiol, NL-6703 BD Wageningen, Netherlands

[9] Univ Queensland, Sch Integrat Biol, Brisbane, Qld 4072, Australia

来源：

NATURE | 2008年 / 455卷 / 7210期

关键词：

D O I：

10.1038/nature07271

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A carotenoid- derived hormonal signal that inhibits shoot branching in plants has long escaped identification. Strigolactones are compounds thought to be derived from carotenoids and are known to trigger the germination of parasitic plant seeds and stimulate symbiotic fungi. Here we present evidence that carotenoid cleavage dioxygenase 8 shoot branching mutants of pea are strigolactone deficient and that strigolactone application restores the wild- type branching phenotype to ccd8 mutants. Moreover, we show that other branching mutants previously characterized as lacking a response to the branching inhibition signal also lack strigolactone response, and are not deficient in strigolactones. These responses are conserved in Arabidopsis. In agreement with the expected properties of the hormonal signal, exogenous strigolactone can be transported in shoots and act at low concentrations. We suggest that endogenous strigolactones or related compounds inhibit shoot branching in plants. Furthermore, ccd8 mutants demonstrate the diverse effects of strigolactones in shoot branching, mycorrhizal symbiosis and parasitic weed interaction.

引用

页码：189 / U22

页数：7