短報
Effect of Temperature before and after Pollination on Pollen Function in ‘Chanee’ Durian
2020 年 58 巻 3 号 p. 85-89
詳細
2020 年 58 巻 3 号 p. 85-89
Ambient temperature at anthesis is important for pollen germination and pollen tube elongation. In this experiment, the effect of ambient temperature (15, 20, 25, and 30℃) at flowering (1600 to 1900 hours) on subsequent pollen germination was analyzed in‘Chanee’and‘Monthong’durian. The effect of ambient temperature (15, 20, 25, and 30℃) after pollination on pollen tube elongation was also examined in‘Chanee’at 12, 24 and 48 hours after pollination. Low temperatures during anther dehiscence decreased pollen germination in both cultivars; however, the rate was higher in‘Chanee’(27―63％) than‘Monthong’(4―37％) under all temperature conditions. Pollen tube length was significantly shorter in‘Chanee’at 15℃ 12 hours after pollination (12％ the length of the pistil); however, elongation did not differ from that under other temperature conditions at 20℃ (57―63％). These findings suggest the effectiveness of‘Chanee’pollen under low temperatures from flowering through fertilization.
