Toppan A, Roby D, Esquerré-Tugayé M T
Université Paul Sabatier, Centre de Physiologie Végétale-L. A. 241 Centre National de la Recherche Scientifique, 31062 Toulouse Cédex, France.
Plant Physiol. 1982 Jul;70(1):82-6. doi: 10.1104/pp.70.1.82.
Ethylene production and cell wall hydroxyproline-rich glycoprotein (HRGP) biosynthesis are greatly enhanced in melon (Cucumin melo cv. Cantaloup charentais) seedlings infected with Colletotrichum lagenarium. Short-term experiments performed in the presence of specific inhibitors of the ethylene pathway from methionine, namely l-canaline and amino-ethoxyvinylglycine, indicate that under non-toxic conditions, both ethylene and [(14)C]hydroxyproline deposition in the cell wall of infected tissues are significantly lowered. On the contrary, treatment of healthy tissues with 1-aminocyclopropane 1-carboxylic acid, a natural precursor of ethylene, stimulates both the production of the hormone and the incorporation of [(14)C]hydroxyproline into cell wall proteins.The data provide the first evidence of the in vivo effect of ethylene on the cell wall hydroxyproline-rich glycoprotein biosynthesis in plants.
感染葫芦炭疽菌的甜瓜(Cucumin melo cv. Cantaloup charentais)幼苗中,乙烯生成和细胞壁富含羟脯氨酸糖蛋白(HRGP)的生物合成显著增强。在存在从甲硫氨酸开始的乙烯途径特异性抑制剂(即L-刀豆氨酸和氨基乙氧基乙烯基甘氨酸)的情况下进行的短期实验表明,在无毒条件下,感染组织细胞壁中的乙烯和[(14)C]羟脯氨酸沉积均显著降低。相反,用乙烯的天然前体1-氨基环丙烷-1-羧酸处理健康组织,会刺激激素的产生以及[(14)C]羟脯氨酸掺入细胞壁蛋白。这些数据首次证明了乙烯对植物细胞壁富含羟脯氨酸糖蛋白生物合成的体内效应。