The role of gibberellins A13 and A14 in the biosynthesis of gibberellic acid
โ Scribed by B.E. Cross; K. Norton
- Publisher
- Elsevier Science
- Year
- 1966
- Tongue
- French
- Weight
- 161 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0040-4039
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๐ SIMILAR VOLUMES
Excised maize (Zea mays L.) endosperms incubated in buffer rapidly degrade their starch and protein reserves. These processes are not markedly stimulated by addition of gibberellic acid (GA3). However protease and c~-amylase production are strongly inhibited by abseisie acid, and this inhibition can
Incubation of a cell-free system from immature seeds of Cucurbita maxima Duch. with [(14)C]GA12-aldehyde derived from [(14)C]mevalonic acid in the same system yielded the C19-gibberellin, [(14)C]GA4, in addition to the C20-gibberellins, [(14)C]GA37, [(14)C]GA13 and [(14)C]GA43. (GA-gibberellin).
Gibberellin A14 and kaurene, precursors of gibberellin A a, are active in the barley endosperm reducing-sugar assay, but require longer incubation periods for activity to be observed than does GA 3. This finding shows that the incubation period must be considered when determining whether a compound