Characterization and Role of an Endogenous Inhibitor in the Induction of Cold Hardiness in Acer negundo
Open Access
- 1 June 1969
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 44 (6), 801-805
- https://doi.org/10.1104/pp.44.6.801
Abstract
An inhibitor extracted from short day treated Acer negundo leaves was compared to abscisic acid in 4 different solvent systems. The chromatographic properties of abscisic acid and the inhibitor were in very close agreement. Treatment of Acer negundo plants under non-hardening preconditions (long days) with either the inhibitor or abscisic acid increased hardiness after a hardening period of 3 weeks at 40°. A gibberellin-inhibitor relationship was further studied by making comparison of extracts of plants subjected to either 4 weeks of long days, long days + 5° nights, or short days. These tests indicated that gibberellin-like activity was greatest when the treatment included long days. Abscisic acid-like levels were highest when the treatments consisted of short days or long days + 5° nights. Since the latter groups are the most capable of developing hardiness, the hardening process appears to be more closely related to a build-up of abscisic acid levels than a reduction of gibberellin levels.Keywords
This publication has 4 references indexed in Scilit:
- Regulation of Cold Hardiness in Acer negundoPlant Physiology, 1968
- The Long Day Leaf As A Source of Cold Hardiness InhibitorsPlant Physiology, 1967
- Environmental Control of Cold Hardiness in Woody PlantsPlant Physiology, 1967
- Dormancy Regulation in Peach SeedsScience, 1966