In vitro glucosylation of gibberellins |
| |
Authors: | G Sembdner H -D Knöfel Evelin Schwarzkopf H W Liebisch |
| |
Institution: | (1) Institute of Plant Biochemistry, Academy of Sciences of the GDR, DDR-4010 Halle/Saale Weinberg |
| |
Abstract: | In maturing fruits ofPhaseolus coccineus a soluble glucosyltransferase activity occurs which converts gibberellins into their O-glucosides. The enzyme glucosylates
GA3 and structurally closely related gibberellins (GA7 and GA30) to their 3-O-glucosides by transfer of glucose preferentially from UDP-glucose.
From cell suspension cultures ofLycopersicon peruvianum cytosolic glucosyltransferases were isolated which in the presence of UDP-glucose converted GA7 and GA9 to the corresponding glucosyl esters. In both cases numerous other gibberellins failed to serve as substrates. Thus, the
enzymes are UDP-glucose: gibberellin glucosyltransferases of considerable substrate specificity. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |