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A thermal time model of post‐initiation flower development in the shade plant, cineraria
Author(s) -
YEH D M,
ATHERTON J G,
CRAIGON J.
Publication year - 1999
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1999.tb05273.x
Subject(s) - anthesis , biology , photoperiodism , horticulture , botany , greenhouse , degree day , cultivar , meteorology , physics
Summary Effects of temperature on flower development in cineraria cv. Cindy Blue were studied in controlled environment rooms and in glasshouses. The base, optimum and maximum temperatures respectively for progress to macroscopic flower appearance after flower initiation respectively were 1.6°C, 19.3°C and 39.8°C. From these cardinal temperatures, a thermal time requirement for flower appearance after flower initiation was calculated to be 130°Cd. The base, optimum and maximum temperatures for progress to anthesis after flower initiation were respectively 1.7°C, 22.3°C and 37.1°C and from these values, the thermal time required to reach anthesis after flower initiation was calculated to be 555°Cd. No significant difference was demonstrated between thermal times for flower development in plants grown in controlled environment growth rooms or under glasshouse conditions where irradiance and photoperiod varied markedly.