Pinto M P, Ricardo C P
Instituto de Tecnologia Química e Biológica, R. da Quinta Grande, Oeiras, Portugal.
Plant Physiol. 1995 Dec;109(4):1345-51. doi: 10.1104/pp.109.4.1345.
We describe a group of three acidic proteins, pathogenesis-related (PR)-p16.5a, PR-p16.5b, and PR-p16.5c, that accumulate in the leaves of Lupinus albus L. cv Rio Maior plants when infected with the fungus Colletotrichum gloeosporioides Penz. These proteins co-migrate in sodium dodecyl sulfate-polyacrylamide gels as a single band of 16.5 kD, behaving as charge isomers, and are related to several members of the defense-related PR-10 protein family. Localization of the proteins was investigated by techniques of tissue printing and immunogold electron microscopy; they are predominantly associated with the vascular system and are localized extracellularly. The accumulation of PR-p16.5a, PR-p16.5b, and PR-p16.5c also seems to be induced by cucumber mosaic virus and by two forms of abiotic stress, salicylic acid and ultraviolet, suggesting a general defense role for these proteins.
我们描述了一组三种酸性蛋白,即病程相关(PR)-p16.5a、PR-p16.5b和PR-p16.5c,当白羽扇豆(Lupinus albus L. cv Rio Maior)植株被胶孢炭疽菌(Colletotrichum gloeosporioides Penz.)感染时,它们会在叶片中积累。这些蛋白在十二烷基硫酸钠-聚丙烯酰胺凝胶中以一条16.5 kD的单带形式共同迁移,表现为电荷异构体,并且与防御相关的PR-10蛋白家族的几个成员相关。通过组织印迹和免疫金电子显微镜技术研究了这些蛋白的定位;它们主要与维管系统相关,并且定位于细胞外。PR-p16.5a、PR-p16.5b和PR-p16.5c的积累似乎也由黄瓜花叶病毒以及水杨酸和紫外线这两种非生物胁迫形式诱导,表明这些蛋白具有普遍的防御作用。