eCite Digital Repository
Rapid increases in cytokinin concentration in lateral buds of chickpea (Cicer arietinum L.) during release of apical dominance
Citation
Turnbull, CGN and Raymond, MAA and Dodd, IC and Morris, SE, Rapid increases in cytokinin concentration in lateral buds of chickpea (Cicer arietinum L.) during release of apical dominance, Planta, 202, (3) pp. 271-276. ISSN 0032-0935 (1997) [Refereed Article]
DOI: doi:10.1007/s004250050128
Abstract
We examined the role of cytokinins (CKs) in release of apical dominance in lateral buds of chickpea (Cicer arietinum L.). Shoot decapitation or application of CKs (benzyladenine, zeatin or dihydrozeatin) stimulated rapid bud growth. Time-lapse video recording revealed growth initiation within 2 h of application of 200 pmol benzyladenine or within 3 h of decapitation. Endogenous CK content in buds changed little in the first 2 h after shoot decapitation, but significantly increased by 6 h, somewhat later than the initiation of bud growth. The main elevated CK was zeatin riboside, whose content per bud increased 7-fold by 6 h and 25-fold by 24 h. Lesser changes were found in amounts of zeatin and isopentenyl adenine CKs. We have yet to distinguish whether these CKs are imported from the roots via the xylem stream or are synthesised in situ in the buds, but CKs may be part of an endogenous signal involved in lateral bud growth stimulation following shoot decapitation. To our knowledge, this is the first detailed report of CK levels in buds themselves during release of apical dominance.
Item Details
Item Type: | Refereed Article |
---|---|
Research Division: | Biological Sciences |
Research Group: | Plant biology |
Research Field: | Plant physiology |
Objective Division: | Plant Production and Plant Primary Products |
Objective Group: | Other plant production and plant primary products |
Objective Field: | Other plant production and plant primary products not elsewhere classified |
UTAS Author: | Morris, SE (Dr Suzanne Morris) |
ID Code: | 23817 |
Year Published: | 1997 |
Web of Science® Times Cited: | 90 |
Deposited By: | Agricultural Science |
Deposited On: | 2002-07-15 |
Last Modified: | 2002-07-15 |
Downloads: | 0 |
Repository Staff Only: item control page