无腺体棉花不是真正的无酚棉。棉酚作为棉族的特征,既存在于有腺体棉中,也存在于无腺体棉的组织内。两者的本质差异并不在于组织内的游离棉酚的有无,而是在于腺体和其中结合棉酚的有无。在幼苗期,无腺体棉胚根棉酚含量一直高于有腺体棉。但是随着日龄的增加,虽然它本身的棉酚含量持续增加,但与有腺体棉的差异越来越小。无腺体棉幼苗期根部高棉酚含量与其出苗较好、苗病较轻的关系有待进一步研究。在幼苗异养过程中,无腺体棉地上部分均测不到棉酚。子叶作为貯藏物质的来源因转运和消耗,干物质含量下降,下胚轴和胚根因迅速生长而干物量增加。随着异养向自养过程转化(子叶张开后),不论在以分解为主的子叶中,还是在以生长为主的胚轴和胚根内,棉酚含量都随之增加。幼苗若处于长期的黑暗条件下,可以刺激其组织内棉酚含量的提高,如同它在病害侵染或高温等逆境条件下的反应。 No gland cotton is not really phenol-free cotton. Gossypol is a characteristic of the cotton race, existing both in glandular cotton and also in tissues without glandular cotton. The essential difference between the two lies not in the organization of free gossypol, but rather in the glands and the presence of gossypol. In the seedling stage, the gossypol content of gland without gland was always higher than that of glandular cotton. However, with the increase of age, although its own gossypol content continued to increase, the difference with glandular cotton became smaller and smaller. No gland cotton seedlings at the root of cotton phenol content and its emergence is better, the lighter the relationship between the disease needs further study. In the process of heterotrophic seedlings, gossypol can not be detected in the aerial part of cotton without gland. Cotyledon as a source of storage material due to transport and consumption, dry matter content decreased, hypocotyl and radicle growth due to rapid increase in dry matter. With heterotrophic transformation to autotrophic processes (after cotyledon was opened), gossypol content increased in both cotyledons that were mainly decomposed and in the hypocotyls and radicles that grew mainly. Under prolonged dark conditions, seedlings can stimulate an increase in gossypol content in their tissues as they respond to adverse conditions such as disease infestation or high temperatures.