Effects of Daily Photoperiod/Nyctoperiod and Temperature on Autumn Development of Crown Buds and Dormanc y, Freeze Tolerance, and Storage of Food Reserves in Latitudinal Ecotypes of Biennial White Sweetclover

摘要

The investigation consisted of both an outdoorud-- experiment and one conducted indoors in controlledenvironmentud-- chambers. Objectives were to determineud-- during late-summer/autumn the effects of (a) theud-- changing daily light/dark (photoperiod/nyctoperiod)ud-- pattern, and (b) seasonally lowering temperatures onud-- pre-winter behavior of sweetclover. Measurementsud-- were made of certain morphological characteristicsud-- and various facets of the winter-hardening process.ud-- Both experiments were conducted at the University ofud-- Alaska’s Palmer Research Center (61.6°N) inud-- southcentral Alaska.