Effects of temperature and photoperiod on vegetative and reproductive growth were investigated in everbearing strawberry (Fragaria X ananassa Duch. cv. 'Summerberry') plants. Runner plants grown in a nursery field until November were transplanted to clay pots, and were grown in growth chambers at a 12-hr day/night setting of 20/15°, 25/20°, and 30/25°C, under either constant light (24-hr, long-day) or an 8-hr (short-day) photoperiod. The treatments were started on December 1. 1. At 30/25°C, the appearance of an inflorescence was inhibited under short-day. By contrast the number of inflorescences was remarkably increased until 10 weeks after the start of the long-day treatment. The production rate of axillary inflorescences which developed from subtended axillary bud without a foliage leaf was increased remarkably under long-day. These results were similar to those of non-dormant plants. 2. At 20/15°C and 25/20°C, more inflorescences were initiated under the long-day than under the short-day treatment. At 20/15°C, the photoperiod was not effective on the development of inflorescences. 3. Under the 8-hr photoperiod, the petioles grew longer at 25/20°and 30/25°than those on plants kept at 20/15°C ; conversely, under the 24-hr photoperiod, the average length of the petioles became shorter at the higher temperatures with time compared to that of plants kept at 20/15°C.
|Number of pages||8|
|Journal||Journal of the Japanese Society for Horticultural Science|
|Publication status||Published - 1998 Mar 1|
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