NJU-NJFU Joint Institute for Plant Molecular Biology, School of Life Sciences, Nanjing University, Nanjing, 210093, China.
College of Life Sciences, Hunan Normal University, Changsha, 410081, China.
Plant Cell Environ. 2015 Dec;38(12):2566-74. doi: 10.1111/pce.12570. Epub 2015 Jul 16.
Environmental inputs such as stress can modulate plant cell metabolism, but the detailed mechanism remains unclear. We report here that FERONIA (FER), a plasma membrane receptor-like kinase, may negatively regulate the S-adenosylmethionine (SAM) synthesis by interacting with two S-adenosylmethionine synthases (SAM1 and SAM2). SAM participates in ethylene, nicotianamine and polyamine biosynthetic pathways and provides the methyl group for protein and DNA methylation reactions. The Arabidopsis fer mutants contained a higher level of SAM and ethylene in plant tissues and displayed a dwarf phenotype. Such phenotype in the fer mutants was mimicked by over-expressing the S-adenosylmethionine synthetase in transgenic plants, whereas sam1/2 double mutant showed an opposite phenotype. We propose that FER receptor kinase, in response to environmental stress and plant hormones such as auxin and BR, interacts with SAM synthases and down-regulates ethylene biosynthesis.
环境输入，如压力，可以调节植物细胞代谢，但详细的机制仍不清楚。我们在这里报道，质膜受体样激酶 FERONIA（FER）可能通过与两个 S-腺苷甲硫氨酸合酶（SAM1 和 SAM2）相互作用，负调控 S-腺苷甲硫氨酸（SAM）的合成。SAM 参与乙烯、植物螯合肽和多胺生物合成途径，并为蛋白质和 DNA 甲基化反应提供甲基。拟南芥 fer 突变体植物组织中含有更高水平的 SAM 和乙烯，并表现出矮化表型。在转基因植物中过表达 S-腺苷甲硫氨酸合酶可以模拟 fer 突变体的这种表型，而 sam1/2 双突变体则表现出相反的表型。我们提出，FER 受体激酶可以响应环境胁迫和植物激素，如生长素和 BR，与 SAM 合酶相互作用，并下调乙烯的生物合成。
