Critical Photoperiod for Flower Bud Initiation in Everbearing Strawberry 'Summerberry' Plants Grown at High Temperatures(Plant Production Science, Horticultural Science)

概要

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The critical photoperiod for inflorescence production and flower bud initiation in everbearing strawberry ( Fragaria×ananassa Duch. 'Summerberry') plants was investigated. Plants were grown in phytotrons controlled at day (6:00-18:00) and night (18:00-6:00) temperatures of 30 and 25℃, respectively, under photoperiods of 12, 13, 14, 15 or 16 hours. The experiment was carried out for 24 weeks, from 2 December 1996 to 12 May 1997. During the test period, fewer inflorescences were produced under the 12- and 13-hr photoperiods than under the 14-, 15- and 16-hr photoperiods. Under the 12- and 13-hr photoperiods, leaves expanded continuously throughout the 24 weeks, but by the end of the test period inflorescence production was almost completely inhibited and flower primordia had not initiated in the apices of some branch crowns. Based on these results, the critical photoperiod for inflorescence production and flower bud initiation in 'Summerberry' plants grown at high temperatures found to fall between 13 and 14 hours.critical photoperiodeverbearing strawberryflower bud initiationhigh temperatureinflorescence production
東北大学の論文
2006-03-31