Modes of Ethylene Action in the Release of Amylase from Barley Aleurone Layers

Publisher Website
Google Scholar
Abstract
The development of xylanase activity by isolated barley (H. vulgare cv. Himalaya) aleurone layers exposed to GA was enhanced by ethylene, whereas the rate of glucanase synthesis was unaffected by ethylene. The elevated xylanase activity expressed in ethylene-treated tissue may be responsible for enhanced release of amylase in response to ethylene. The redistribution of ionic species in response to GA and ethylene was explored. The release of Ca2+ was much more sensitive to ethylene than the release of any of the other ions investigated (K+, Mg2+ and phosphate). Ethylene induced a 101% increase in the release of Ca2+ from GA-treated aleurone layers. The ethylene-enhanced release of amylase is discussed.