Effect of PME or PG on fruit set in suspension media for spray pollination in peach [Prunus persica]
2008
Sakamoto, D.(National Inst. of Fruit Tree Science, Tsukuba, Ibaraki (Japan)) | Hayama, H. | Ito, A. | Kashimura, Y. | Moriguchi, T. | Nakamura, Y.
To establish a spray pollination system for peach (Prunus persica Batsch) fruit cultivation, we investigated the effects of pectin methylesterase (PME) and polygalacturonase (PG) concentrations in pollen suspension media on pollen germination and pollen tube elongation. Furthermore, the rates of fruit set and fruit quality of 'Kawanakajima Hakuto' peach were compared with hand pollination and spray pollination using various suspension media. The improvement of pollen tube growth was observed at either 0.1 mg/L PME or PG. Rates of fruit set in spray pollination treatments were significantly lower than that by hand pollination treatment. Among the suspension media tested in this study, the combination of 10% sucrose, 0.04% XG and 0.1 mg/L PME or PG gave the highest rates of fruit set. There were no significant differences in fruit quality between spray pollination and hand pollination. Based on these findings, the addition of PME or PG in the pollen suspension media for spray pollination can improve the fruit set in the spray pollination of peaches.
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