Self-compatible and -incompatible reactions in Asiatic hybrid Lilium x "Enchantment": Influence of pistil age on seed set
1997
Niimi, Y. (Niigata Univ. (Japan). Faculty of Agriculture) | Li, T.H. | Matsuo, K.
Cross-pollination (L. hybrid Enchantment x L. maculatum Thunb.) was made before or after anthesis. The receptivity of pistils was observed from 6 days before anthesis (day 16) to 6 days after flowering (day +6). On crossing made on day 0, the number of mature seeds was 185 per capsule, whereas those on day +2 yielded 236 seeds per capsule. Flowers self-pollinated on day 0 yielded no seeds, and the ratio of pollen-tube length / style-length in the pistil was 0.85. Numerous abnormal pollen tubes with swollen or deformed bulbous tips with delayed generative nuclear division were observed compared with flower selfed on day +3. Self-pollinated flowers on day -3, -2, -1, +1, +2, +4, and +6 developed capsules. Capsules from day +6 flowers produced 46 mature seeds, whereas the other yielded only 13 to 27 seeds per capsule. These findings show that L. X Enchantment is a relatively weak self-incompatible cultivar. When seeds resulting from flowers self- or cross-pollinated at different stages were planted, differences in germination time and final germination percentage were observed. Of the cross-pollinated mature seeds mad eon day 0, 75% germinated; of the self-pollinated seeds made on day +2, 72% germinated, whereas those made on day +6, only 44% germinated
显示更多 [+] 显示较少 [-]