ISHS Acta Horticulturae 769: XXVII International Horticultural Congress - IHC2006: International Symposium on Asian Plants with Unique Horticultural Potential
POLLEN TUBE GROWTH BEHAVIOR OF DURIANS (DURIO ZIBETHINUS) |
| Authors: | Iou-Zen Chen, Tsu-Liang Chang, Kien-Hock Lo |
| Keywords: | durians, pollen tube, pollination |
| Abstract:
Two durian cultivars, ‘Monthong’ and ‘Chanee’, were investigated in vivo assisted post-pollination processes in pistil and fruit set percentages of self-pollination and reciprocal crossing. Pollens of each cultivar germinated normally on both stigmas and grew healthily inwards, and the percentages of penetrated ovules among all treatments were over 40%. However, the fruit set of self pollinated ‘Chanee’ was extremely low. The fruit set percentage of self pollination flowers at 35 d after pollination (DAP) of ‘Chanee’ was 0% in 2002 and 2003 whilst that of ‘Monthong’ was 6.9% in 2002, and 23.6% in 2003. The fruit set percentages of cross pollination treatment were significantly higher than either of the above. According to the pollen tube growth behaviors and non-synchronization dropping of the fruit between self-pollination and two crossing combinations, ‘Monthong’ and ‘Chanee’ durians might possess post-zygotic barriers for selfing, especially ‘Chanee’. | |
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