Department of Botany, The Hebrew University, Jerusalem, Israel.
Plant Physiol. 1975 Jul;56(1):93-6. doi: 10.1104/pp.56.1.93.
In the developing seed coat of Pisum elatius, o-dihydroxyphenols are present in appreciable amounts at all stages of development. However, catechol oxidase activity rises sharply during the later stages of development, shows a further abrupt rise during dehydration of the seed coat, and then decreases. It is suggested that a tanning reaction is induced by the contact of enzyme with its substrate while cell membranes are ruptured, and that this reaction renders the seed coats impermeable. The entire chain of events does not occur in Pisum sativum which has permeable seed coats.
在豌豆种皮的发育过程中,邻苯二酚在各个发育阶段都以相当大的量存在。然而,儿茶酚氧化酶的活性在发育后期急剧上升,在种皮脱水过程中进一步急剧上升,然后下降。这表明,当细胞膜破裂时,酶与底物接触会引发鞣制反应,从而使种皮不透水。在具有可透种皮的豌豆中,整个事件链不会发生。