Journal Article

Plants transfer lipids to sustain colonization by mutualistic mycorrhizal and parasitic fungi

Liu, Lixia, Yang, Chen, Wang, Ertao, Xie, Qiujin, Liu, Na, Zhang, Xiaowei, Wang, Wanxiao, Chen, Xiaoya, Jiang, Yina, Wang, Dapeng, Tang, Dingzhong

2017

Overview

Arbuscular mycorrhizal (AM) fungi facilitate plant uptake of mineral nutrients and draw organic nutrients fromthe plant. Organic nutrients are thought to be supplied primarily in the formof sugars. Here we show that the AM fungus Rhizophagus irregularis is a fatty acid auxotroph and that fatty acids synthesized in the host plants are transferred to the fungus to sustain mycorrhizal colonization. The transfer is dependent on RAM2 (REQUIRED FOR ARBUSCULAR MYCORRHIZATION 2) and the ATP binding cassette transporter–mediated plant lipid export pathway. We further show that plant fatty acids can be transferred to the pathogenic fungus Golovinomyces cichoracerum and are required for colonization by pathogens. We suggest that themutualistic mycorrhizal and pathogenic fungi similarly recruit the fatty acid biosynthesis program to facilitate host invasion.

• Publisher: American Association for the Advancement of Science
• Subject: Ascomycota - growth & development / Ascomycota - metabolism / Ascomycota - physiology / Daucus carota - metabolism / Daucus carota - microbiology / Fatty Acids - metabolism / Gene Expression Regulation, Plant / Glomeromycota - growth & development / Glomeromycota - metabolism / Glomeromycota - physiology / Mycorrhizae - growth & development / Mycorrhizae - metabolism / Mycorrhizae - physiology / Plant Proteins - genetics / Plant Proteins - metabolism / Plant Roots - metabolism / Plant Roots - microbiology / Symbiosis