New Zealand Journal of Crop and Horticultural Science abstracts
Axillary shoot bud development in selected Actinidia species
ANGELA M. SNOWBALL
The Horticulture and Food Research
Institute of New Zealand
Mt Albert Research Centre
Private Bag 92 169
Auckland, New Zealand
Abstract Development of shoot buds of 10 Actinidia
species from inception at budbreak to full-size, dormant buds is described as
an important pre-requisite for understanding vine physiology. Bud diameter was
measured, leaf initials, and axillary structures were identified and counted
with a dissecting microscope. Areas of the subtending leaves were measured.
Both shoot bud size and leaf area decreased from the base to the tip of shoots.
Shoot bud morphology was clearly affected by taxonomic grouping. Shoot buds of
genotypes in the Section Leiocarpae were small, with small ostioles,
many small leaf initials, and no basal buds. Shoot buds of genotypes in the
Sections Strigosae and Stellatae were comparatively large, with
large ostioles, fewer leaf initials, and several basal buds. Shoot buds of
A. arguta had no axillary structures. When the distribution of axillary
structures was compared with the distribution of axillary flowers on shoots,
two patterns were noted. Either all the primordia which would form flowers were
already present in the shoot bud or many or all of the primordia which would
form flowers were not present in the shoot bud.
Keywords bud dissections; axillary primordia; leaf initials;
bud anatomy; bud morphology
New Zealand Journal of Crop and Horticultural Science, 1997, Vol. 25:
233-242
0114-0671/97/2503-0233 $7.00/0 (c) The Royal Society of New Zealand
1997
PDF file of entire paper: medium quality (662K); (scanned from paper original: notes about this process)
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