Vol. 73 No: 6

Title:
Short Days and Temperature Effects on Growth and Flowering in Strawberry (Fragaria × Ananassa Duch.)

Authors:
ANITA SØNSTEBY and ARNFINN NES

pp: 730-736

Abstract:
‘Korona’, ‘Elsanta’, ‘Bounty’ and ‘Senga Sengana’ strawberry (Fragaria × ananassa Duch.) plants, were placed at constant temperatures of 9,15 or 21°C and daylengths of 8 h (short day) or 24 h (long day). The plants were given different numbers of short-day (SD) cycles, and flowering and growth were studied. ‘Korona’ and ‘Elsanta’ were responsive to both short-day treatment and temperature, with optimum flowering at 15°C and 24 SD. ‘Bounty’ was more responsive to temperature, inducing flowers independently of the number of SD cycles at 9°C and 15°C. In ‘Senga Sengana’ flowering was induced independently of temperature and the number of SD cycles, indicating that it had a stronger dependence on other environmental effects. The effect of the number of short-day cycles and the temperature on vegetative growth variates such as the number of stolons and daughter plants, the length of flower trusses and petiole length were also studied.

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