New Zealand Journal of Botany abstracts
Short communication
Whole-tree winter leaf-loss in wineberry (Aristotelia serrata,
Elaeocarpaceae) is not related to mean air temperature
ROGER J. DUNGAN
Ecology and Entomology Group
Lincoln University
P.O. Box 84
Lincoln 8150, New Zealand
Email: dunganr@landcare.cri.nz
Abstract Winter leaf-loss of wineberry (
Aristotelia
serrata) was measured at a range of sites in the South Island of New
Zealand in early spring to investigate the temperature dependence of
deciduousness in this species. The number of leaves emerged over the growing
season on both shaded and exposed shoots increased with temperature across
sites. There was consistently greater leaf loss from exposed shoots than from
shaded shoots. Contrary to a widely held view, there was no temperature
dependence of leaf loss in wineberry at the whole-tree scale. However, the
difference in proportional leaf loss between exposed and shaded shoots
decreased with increasing temperature, driven by an increase in leaf loss from
shaded shoots at warm sites. Causes of these patterns may be elucidated by
investigations of shoot-level phenology and leaf responses to winter
photoinhibition.
Keywords deciduousness; New Zealand; temperature response
B01014
Received 19 April 2001; accepted 31 May 2001
New Zealand Journal of Botany, 2001, Vol. 39: 547-550
0028-825X/01/3903-0547 $7.00 (c) The Royal Society of New Zealand 2001
PDF file of entire paper: medium quality (336K); (scanned from paper original: notes about this process)
This year's abstracts |
Journal home page |
All abstracts |
Publishing home page
