Abstract
6-Benzylaminopurine and α-naphthaleneacetic acid each stimulate inulase and invertase activities in Cichorium intybus, although these two hormones induce different organ formations. Unlike auxin, however, cytokinin allows a partial elaboration of sucrose reserves without changing callus growth. Furthermore, addition of an external source of glucose inhibits inulase and invertase activities, which results in an increase in sugar reserves (sucrose and starch) in the bulky callus. This activity differs from that observed with α-naphthaleneacetic acid, which is characterized by an increase in protein synthesis and water absorption in the tissues. Root initiation also requires additional sugars with α-naphthaleneacetic acid; gibberellic acid improves these results by promoting the catabolism of external sugars rather than a conversion into tissue reserves. Key words: organogenesis, Cichorium intybus, carbohydrates, in vitro cultures.
Published Version
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