Université Paul Sabatier, Centre de Physiologie Végétale-LA 241 CNRS, 118 route de Narbonne, 31077 Toulouse, France.
Plant Physiol. 1979 Aug;64(2):320-6. doi: 10.1104/pp.64.2.320.
Enrichment of the cell wall in hydroxyproline-rich glycoprotein is involved in the defense of muskmelon (Cucumis melo) seedlings to Colletotrichum lagenarium, the causative agent of anthracnose. The extent to which this accumulation proceeds may be experimentally modified by treating plants with ethylene or growing them in the presence of free l-trans-hydroxyproline. It appears that the increase in the wall hydroxyproline-rich glycoprotein mediated through ethylene is paralleled by an increasing resistance of the host to the pathogen. Inversely, inhibiting the synthesis of this glycoprotein in diseased plants is strictly correlated to an accelerated and more intense colonization of the host by the pathogen.In both cases, the inverse relationship between the accumulation of hydroxyproline-rich glycoproteins and the ability of the pathogen to develop in the host has been checked by the quantification, in infected tissues, of glucosamine, a characteristic component of chitin-containing fungi.
富含羟脯氨酸的糖蛋白在细胞壁中的富集参与了甜瓜（Cucumis melo）幼苗对炭疽病病原菌胶孢炭疽菌（Colletotrichum lagenarium）的防御。通过用乙烯处理植物或在游离 l-反式-羟脯氨酸存在的情况下培养植物，可以在实验上改变这种积累的程度。通过乙烯介导的细胞壁富含羟脯氨酸的糖蛋白的增加似乎与宿主对病原体的抗性增加平行。相反，在患病植物中抑制这种糖蛋白的合成与病原体对宿主的加速和更强烈的定殖严格相关。在这两种情况下，通过对感染组织中几丁质真菌特征成分氨基葡萄糖的定量，都验证了富含羟脯氨酸的糖蛋白的积累与病原体在宿主中发育能力之间的反比关系。
