Influence of benzyladenine and gibberellic acid on organogenesis in 'Crimson Giant' Easter cactus

Experiments were performed to determine the influence of gibberellic acid (GA3) and benzyladenine (BA) on organogenesis of 'Crimson Giant' Easter cactus [Hatiora gaertneri (Regel) Barthlott] phylloclades cultured in vitro. The numbers of flower buds and new phylloclades increased linearly...

Full description

Saved in:
Bibliographic Details
Published in:Plant growth regulation 1997, Vol.22 (2), p.131-136
Main Authors: Boyle, T.H, Marcotrigiano, M
Format: Article
Language:English
Subjects:
benzyladenine
Biological and medical sciences
dose response
flowering
flowers
Fundamental and applied biological sciences. Psychology
gibberellic acid
growth
Hatiora
in vitro culture
organogenesis
photoperiod
Physical agents
Plant physiology and development
regulation
temperature
timing
Vegetative apparatus, growth and morphogenesis. Senescence
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Experiments were performed to determine the influence of gibberellic acid (GA3) and benzyladenine (BA) on organogenesis of 'Crimson Giant' Easter cactus [Hatiora gaertneri (Regel) Barthlott] phylloclades cultured in vitro. The numbers of flower buds and new phylloclades increased linearly as BA concentration increased from 0 to 444.1 micromolar. GA3 increased the number of new phylloclades when present in moderate concentrations (2.9 or 28.9 micromolar), but inhibited flower bud formation when present in concentrations as low as 0.3 micromolar. The inhibitory effect of GA3 on flower bud formation was diminished when the medium was amended with BA at 44.4 or 444.1 micromolar. Explants cultured in media that contained 288.7 micromolar GA3 produced fewer organs (new phylloclades plus flower buds) compared to those cultured in media with 0,0.3, 2.9, or 28.9 micromolar GA3. BA and GA3 concentrations also affected the percentage of explants with flower buds and the percentage of explants with new phylloclades. This study shows that organogenesis in H. gaertneri can be controlled by varying the concentrations of BA and GA3 in the culture medium.
ISSN:0167-6903
1573-5087
DOI:10.1023/A:1005838609444