Fruit Set and Growth in Strawberry, Fragaria × ananassa Duch.

Publisher Website
Google Scholar
Abstract
The application of GA3‡in aqueous solution to leaves or flowers of hermaphrodite cultivars of strawberry, Redgauntlet and Rabunda, prevented growth of the receptacle despite hand pollination. This inhibitory effect occurred only when GA3 was applied prior to anthesis. Although viable pollen was produced and germinated to grow down the styles of treated plants, no seeds were formed. Receptacle growth failed underneath the unfertilized carpels, but the basal region devoid of carpels enlarged and ripened. The effect of GA3 was the same in vivo and for flowers grown in vitro. ABA and BAP also inhibited growth of pollinated flowers in vitro, but neither substance stimulated growth of the base of the receptacle. 2-NOA stimulated receptacle growth of pollinated flowers but did not overcome the inhibitory effect of GA3. Removal of fertile carpels 9 days after pollination prevented further receptacle growth. GA3 treatment of the bare receptacle re-started growth but was less effective than 2-NOA. No growth substance treatment induced parthenocarpic development in these cultivars when unopened buds were emasculated and cultured without pollination, although GA3 induced some swelling of the receptacle base.

This publication has 0 references indexed in Scilit: