PGIP在植物抗病方面的研究进展

Advance in the Reseach of olygalacturonase-inhibiting Proteins on Disease-Resistance of Plants

至今为止 ,已在 2 0多种植物体内发现了多聚半乳糖醛酸酶抑制蛋白 (PGIP)。这类蛋白质主要集中于细胞壁和内膜系统 ,但在不同生长时间、不同品种及不同器官中其含量是不一样的 ,研究表明这种差异与植物的抗性强弱有着密切关系。PGIP是病原真菌分泌的endo_PG的抑制剂 ,因此能延缓病原真菌对植物细胞壁的降解。来自菜豆和小麦的实验证据表明病原真菌侵染植株能诱导pgip基因高水平转录、表达 。

So far, polygalacturonase_inhibiting protein(PGIP) has been discovered in 20 species of plants. PGIP is primarily localized in the cell wall and endoplasmic system, but the levels of PGIP in different varieties, organs, or growth phases are different, and these differences are closely related to plant resistance. PGIP is an inhibitor of endo_PG from fungi, thus refrain plant from fungal infection. The experimental dada from Phaseolus vulgaris L. and Triticum aestivum L. indicate that the level of pgip gene transcription and translation is closely related to fungal infection, but this mechanism need further study.