Biosynthesis and metabolism of steryl glycosides in Sinapis alba seedlings |
| |
Authors: | ZA Wojciechowski J Zimowski M Zieleńska |
| |
Institution: | Department of Biochemistry, Warsaw University, 02-089 Warszawa, Al. ?wirki i Wigury 93, Poland |
| |
Abstract: | With 14CO2, d-glucose-U-14C] and dl-mevalonate-4R-4-3H1] used as precursors, a study was made of the labelling dynamics of the steryl glucosides (SG) and steryl acylglucosides (ASG) in Sinapis alba seedlings. The radioactivity of the sterol and sugar moieties, as well as of the fatty acid moieties in the case of ASG, was analysed separately. The course of incorporation of 14C from 14 CO2 and glucose-U-14C] into the sugar part of SG and ASG indicated that about of the whole pool of the newly synthesized sterol glycosides of both types underwent rapid deglucosylation. Likewise, fatty acids in the ASG pool were rapidly exchanged. The present results point to a high metabolic activity of the sterol glycoside derivatives in plant cells. |
| |
Keywords: | Cruciferae steryl glucosides biosynthesis metabolism |
本文献已被 ScienceDirect 等数据库收录! |
|