Premium
PHENOLOGY OF SIX UNITED STATES PROVENANCES OF LIQUIDAMBAR STYRACIFLUA UNDER CONTROLLED CONDITIONS
Author(s) -
Williams George J.,
McMillan Calvin
Publication year - 1971
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1971.tb09941.x
Subject(s) - liquidambar styraciflua , biology , dormancy , phenology , photoperiodism , botany , germination , horticulture , habitat , ecology
Laboratory‐germinated seedlings from Connecticut, New Jersey, Illinois, Tennessee, Texas, and Florida were compared under four photoperiod temperature programs. Under each controlled condition, seedlings of northernmost provenances demonstrated least stem elongation and earliest dormancy. Greatest sensitivity to cool temperatures and short photoperiods was demonstrated by northernmost provenances. At warm temperatures, dormant bud formation was controlled by photoperiod in all populations tested except those from Texas and Florida. The reported differences among populations reflect the effects of natural selection upon different Liquidambar populations, insuring survival of the species in various habitats.