Department of Botany, The Hebrew University, Jerusalem, Israel.
Plant Physiol. 1974 Dec;54(6):817-20. doi: 10.1104/pp.54.6.817.
The seed coat of Pisum elatius is normally impermeable to water. When seeds are dried in the absence of oxygen their coats are totally permeable to water. Structural differences are observed between permeable and impermeable seed coats. In the genus Pisum, species with normally impermeable seed coats have a high content of phenolics and of catechol oxidase, while seed coats of P. sativum contain very little catechol oxidase and have a very low content of phenolics. Such differences are not noted in the cotyledons. We hypothesized that during dehydration of seeds, oxidation of phenolic compounds in seed coats through catalysis of catechol oxidase in presence of O(2) might render the seed coats impermeable to water.
野豌豆的种皮通常是不透水的。当种子在缺氧的情况下干燥时，它们的种皮对水是完全通透的。在通透性和非通透性种皮之间观察到结构差异。在豌豆属中，具有正常不透水性种皮的物种含有高含量的酚类和儿茶酚氧化酶，而 P. sativum 的种皮几乎不含儿茶酚氧化酶，酚类含量也很低。在子叶中没有注意到这种差异。我们假设，在种子脱水过程中，种皮中的酚类化合物在 O(2)存在下通过儿茶酚氧化酶的催化氧化，可能使种皮对水不透。
Zotero 插件
