Endogenous gibberellins in flushing buds of three deciduous trees: Alder, aspen, and birch
✍ Scribed by Karen P. Zanewich; Stewart B. Rood
- Book ID
- 104659125
- Publisher
- Springer
- Year
- 1994
- Tongue
- English
- Weight
- 384 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0721-7595
No coin nor oath required. For personal study only.
✦ Synopsis
Endogenous gibberellins (GAs) were extracted from flushing (expanding) vegetative buds of river alder (Alnus tenuifolia), European white birch (Betula pendula), and aspen (Populus tremuloides) and identified by gas chromatography-mass spectrometry with full scans and/or selected ion monitoring. Five 13-hydroxylated GAs were detected from the three trees: GAI, 8, and 20 from alder, GAI, 8, 19 and 20 from aspen and GAI, s, 19, 20, and 29 from birch. Thirteen other GAs previously detected in Salix or common in other plants were specifically investigated but not detected. The presence of GA l, its probable precursors GA19 and GA2o, and its probable metabolite, GA 8, suggests that the early 13-hydroxylated GA biosynthetic pathway is dominant in vegetative buds of these trees. Abundant endogenous GAs of these trees are similar to the principal GAs of willows (various Salix spp.) and poplars (various Populus spp.). This suggests similarities in the GA physiology and is consistent with a common role of GA~ as a regulator of shoot growth in woody angiosperms. G~bberellins (GAs) have been identified from both angiosperm and gymnosperm trees (Davies et al.