New Zealand Journal of Botany abstracts

---

Changes in osmotic potential during bud break and leaf development of Nothofagus menziesii, Weinmannia racemosa, Quintinia acutifolia, and Ixerba brexioides

T. G. A. GREEN
G. T. JANE

Department of Biological Sciences
University of Waikato
Hamilton, New Zealand

AbstractOsmotic potential (v|/_s) was determined from freezing point depression measurement on leaf exudates. Similar values of \|/_t were found from pressure volume methods. Increased \|/, before and during budbreak was followed by a recovery towards normal values. This pattern is similar to that usually reported for evergreen trees. \|/_s was generally higher on sites of greater altitude reflecting the wetter environment. The results suggest that the seasonal variation in v|/_s is greater than between-site differences.

Keywordsfreezing point depression; pressure-volume; fog; evergreen trees; ecophysiology; forest; New Zealand

Received 15 May 1984; revision 11 July 1983
New Zealand Journal of Botany, 1983, Vol. 21: 391-395
0028-825X/83/2104-0391$2.50/0 © Crown copyright 1983

PDF file of entire paper: medium quality (338K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page