截形苜蓿
共生
生物
丛枝菌根
菌根
蝶形花科
内共生
球囊菌门
植物
丛枝菌根真菌
血球
孢子
细菌
基因
叶绿体
接种
质体
免疫学
生物化学
遗传学
作者
Fabienne Maillet,Véréna Poinsot,André Olivier,Virginie Puech‐Pagès,Alexandra Haouy,Monique Gueunier,Laurence Cromer,Delphine Giraudet,Damien Formey,Andréas Niebel,E. Martínez,Hugues Driguez,Guillaume Bécard,Jean Denarié
出处
期刊:Nature
[Springer Nature]
日期:2011-01-01
卷期号:469 (7328): 58-63
被引量:872
摘要
Arbuscular mycorrhiza (AM) is a root endosymbiosis between plants and glomeromycete fungi. It is the most widespread terrestrial plant symbiosis, improving plant uptake of water and mineral nutrients. Yet, despite its crucial role in land ecosystems, molecular mechanisms leading to its formation are just beginning to be unravelled. Recent evidence suggests that AM fungi produce diffusible symbiotic signals. Here we show that Glomus intraradices secretes symbiotic signals that are a mixture of sulphated and non-sulphated simple lipochitooligosaccharides (LCOs), which stimulate formation of AM in plant species of diverse families (Fabaceae, Asteraceae and Umbelliferae). In the legume Medicago truncatula these signals stimulate root growth and branching by the symbiotic DMI signalling pathway. These findings provide a better understanding of the evolution of signalling mechanisms involved in plant root endosymbioses and will greatly facilitate their molecular dissection. They also open the way to using these natural and very active molecules in agriculture.
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