非豆科植物共生受体样蛋白激酶研究进展

Advance of Plant Symbiosis Receptor_like Kinase in Nonlegumes

摘要:

植物根部能够与微生物形成相互依存、互惠互利的共生关系，非豆科植物根系主要与内生真菌形成菌根的共生体。共生受体样蛋白激酶（symbiosis receptor_like kinase，SYMRK）是植物识别菌根真菌诱导而产生的特异分子，它的蛋白结构由三个部分组成，即：包含3个富含亮氨酸重复序列（LRRs）的胞外受体结合域、跨膜区和胞内蛋白激酶域。Symrk是控制共生形成的一个关键组分，该基因所编码的蛋白在植物识别和应答菌根真菌早期信号转导途径中是必需的。对Symrk基因的研究为进一步弄清植物_真菌共生的功能和作用机理打下了坚实的基础。

Abstract:

Most plants can form a symbiosis in root with microorganisms for mutual benefit, Nonlegumes mainly form the symbiotic mycorrhiza with arbuscular fungi.The interaction is initiated by invasion of arbuscular mycorrhizal(AM) fungi into the plant root, and follows by production of several special signal molecules, such as the symbiosis receptor_like kinase (SYMRK) from plant.SYMRK has an extracellular domain comprising three leucine_rich repeats (LRRs),a transmembrane domain and an cytoplasmic protein kinase domain. Symrk is required for a symbiotic signal transduction pathway from the perception of microbial signal molecules to the rapid symbiosis_related gene activation. Study of symrk may set up a solid foundation for giving further insight on the function and mechanism of plant_fungi symbiosis.