Title
Fluctuation of phytoecdysteroids in developing shoots of Taxus cuspidata
Document Type
Article
Publication Date
1-1-1990
Abstract
Phytoecdysteroids from the vegetative shoots of Taxus cuspidate, an evergreen shrub, were found to fluctuate at different developmental stages during shoot growth. The quantity of ecdysterone (2β,3β,14α,20R,22R,25-hexahydroxy-5β-cholest-7-en-6-one) was 47±5 mg/kg fresh weight, while the quantity of ponasterone A (2β,3β,14α,20R,22R-pentahydroxy-5β-cholest-7-en-6-one) was 23 mg/kg from leaves of one- to two-year-(52-104 week) old shoots. One-, four-, 18- and 37-week-old leaves and soft shoots contained, on a fresh weight basis, respectively, 56, 52, 114 and 127 mg/kg of ecdysterone and 2, 2, 23 and 15 mg/kg of ponasterone A. These results indicate that ecdysteroid accumulation is dynamic and possibly driven by cycles of synthesis, transport, and degradation. © 1990.
Publication Title
Phytochemistry
Recommended Citation
Ripa, P.,
Martin, E.,
Cocciolone, S.,
&
Adler, J.
(1990).
Fluctuation of phytoecdysteroids in developing shoots of Taxus cuspidata.
Phytochemistry,
29(2), 425-427.
http://doi.org/10.1016/0031-9422(90)85090-3
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/5426