Internode length in pisum. Mutantslk,lka, andlkbdo not accumulate gibberellins
✍ Scribed by Naomi L. Lawrence; John J. Ross; Lewis N. Mander; James B. Reid
- Book ID
- 104658704
- Publisher
- Springer
- Year
- 1992
- Tongue
- English
- Weight
- 296 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0721-7595
No coin nor oath required. For personal study only.
✦ Synopsis
The levels of gibberellin Ax (GAI), GA s, GAig, GA2o, GA29, and GA44 in the short Pisum sativum L. mutants lk, lka, and lkb, and comparable wild-type plants, were determined by gas chromatography-selected ion monitoring (GC-SIM) using 2I-1 or ~3C internal standards. The mutants possessed similar GAj levels to wild-type plants, consistent with their classification as GA-sensitivity rather than GA-synthesis mutants. However, these mutants differ from certain sensitivity mutants in other species, in which substantial accumulation of GAt occurs. The results suggest that if the proposed feedback model for the regulation of GA synthesis occurs in peas it is not the reduced growth per se that is the trigger for elevated levels of C~9 GAs. The results are also consistent with the hypothesis that in those GA-sensitivity mutants which do not accumulate C~9 GAs, the biochemical lesion may be well down the transduction pathway which leads from GA~ reception to stem elongation.