Answers are grounded in this paper and cite their sources.
Effects of photoperiod and temperature on frost resistance of seedling populations and clones of white clover (Trifolium repens L.) originating from various latitudes (58°48′–69°54′N) and altitudes (up to 1100 m above sea level) were studied in a phytotron. Low‐temperature‐induced cold acclimation in all populations was significantly stimulated by short photoperiod and low temperature. The highest levels of frost resistance were found in the northernmost seedling populations and in clones from northern coastal locations.
No takes yet. Share an insight, caveat, or question.
Junttila et al. (1990) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: