Studies on the horticultural characteristics of strawberry [Fragaria ananassa] for the development of year-round production and the rease and the extension of a new cultivar adapted for it
2008
Inaba, Y.(Tochigi-ken. Agricultural Experiment Station, Utsunomiya (Japan))
The direction of flower cluster extension was investigated in micropropagated strawberry plants with no stolons. If micropropagated plants were planted at an angle of 20 to 25 deg, primary flower clusters developed in an inclined direction. However, primary flower clusters developed in the opposite direction if inclined pots were rotated by 180 deg, 40 days after the first inclination treatment These results show that the direction of extension of primary flower clusters is determined geotropically during the period between flower bud differentiation and anthesis. Furthermore, it is likely that micropropagated plants will extend flower clusters to the aisle side if they are planted at an angle of 20 to 25 deg toward the aisle side. Effects of day length, planting time and plant nutritional conditions after planting on the development of axillary buds on primary crowns were investigated using 'Tochiotome' and 'Nyoho' strawberries, i. e., tipical cultivars for forcing culture. Axillary buds at the second to the fourth node from the apex of primary crowns usually developed into runners or axillary branches under long day condition in both cultivars. The number of axillary buds that developed into axillary buds or remained as dormant buds increased under short day conditions, especially in 'Tochiotome'. As for the third and fourth node from the apex, late planting and poor nutritional conditions after planting increased the number of axillary buds that developed into axillary branches in 'Nyoho'. On the other hand, poor nutritional condition after planting increased the number of axillary buds that remained as dormant buds and depressed the development of runners in 'Tochiotome' even when planting time was advanced.
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