法国CNRS图卢兹大学Pierre-Marc Delaux研究组取得一项新突破。他们发现脂质交换驱动植物陆地化过程中的互惠进化。这一研究成果发表在2021年5月21日出版的国际学术期刊《科学》杂志上。

他们确定了陆地植物对丛枝菌根真菌（AMF）的保守转录组反应，包括脂质代谢的激活。利用功能获得实验，他们显示了脂质从藜麦Marcantia Palacea到AMF的转移及其通过转录因子WRINKLED（WRI）的直接调节。营养物质交换结构Arbuscules会在M. Palaceea中功能丧失的wri突变形成，从而导致共生失败。

他们的研究结果显示了脂质在陆地植物上的共生转移的正统学，并证明了4.5亿年前陆地植物的最新祖先与AMF存在共生关系。

据介绍，与AMF共生可改善大多数陆地植物的植物营养，并且已经假设其对植物对土地定殖的贡献。

附：英文原文

Title: Lipid exchanges drove the evolution of mutualism during plant terrestrialization

Author: Mélanie K. Rich, Nicolas Vigneron, Cyril Libourel, Jean Keller, Li Xue, Mohsen Hajheidari, Guru V. Radhakrishnan, Aurélie Le Ru, Seydina Issa Diop, Giacomo Potente, Elena Conti, Danny Duijsings, Aurélie Batut, Pauline Le Faouder, Kyoichi Kodama, Junko Kyozuka, Erika Sallet, Guillaume Bécard, Marta Rodriguez-Franco, Thomas Ott, Justine Bertrand-Michel, Giles E. D. Oldroyd, Péter Szvényi, Marcel Bucher, Pierre-Marc Delaux

Issue&Volume: 2021/05/21

Abstract: Symbiosis with arbuscular mycorrhizal fungi (AMF) improves plant nutrition in most land plants, and its contribution to the colonization of land by plants has been hypothesized. Here, we identify a conserved transcriptomic response to AMF among land plants, including the activation of lipid metabolism. Using gain of function, we show the transfer of lipids from the liverwort Marchantia paleacea to AMF and its direct regulation by the transcription factor WRINKLED (WRI). Arbuscules, the nutrient-exchange structures, were not formed in loss-of-function wri mutants in M. paleacea, leading to aborted mutualism. Our results show the orthology of the symbiotic transfer of lipids across land plants and demonstrate that mutualism with arbuscular mycorrhizal fungi was present in the most recent ancestor of land plants 450 million years ago.

DOI: 10.1126/science.abg0929

Source: https://science.sciencemag.org/content/372/6544/864