温州蜜柑の緑かびおよび青かび病に関する研究(第5報) : 罹病果皮組織におけるPectin分解とd-Galacturon酸の作用

概要

論文の詳細を見る
High activity of polygalacturonase was found in the orange peel tissue invaded by Penicillium digitatum and P.italicum, and a remarkable amount (more than 2per cent) of free d-galacturonic acid was detected in the tissues of early stage of infection. Both fungi did not produce titratable free acid -d-galacturonic acid- in culture media of peel extract, unless pectin was added. Orange peel tissues were macerated in vitro with culture filtrate of the causal fungi, and also with d-galacturonic acid. It would, therefore, be possible that the d-galacturonic acid produced in the affected tissue might act to macerate the orange peel in association with the pectic enzymes produced by the invading fungi. d-Galacturonic acid showed an activity of promoting infection of unripe fruit byP enicillium, suggesting that d-galacturonic acid, in the same manner with other acids, brings about destructicn of resistance in the rind tissue.
日本植物病理学会の論文
1963-01-30