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Camellia spp. is an important woody oil in China, which plays an important role in ensuring national grain and oil security. Previous studies showed that the self-incompatibility of Camellia spp. may be one of the important reasons for the low seed setting rate. In this study, fluorescence microscopy and morphological observation were adopted. C. hainanica Reyan 2 and Reyan 3 were used as the material, and the self-cross and hybrid combinations were Reyan 3×Reyan 3, Reyan 3×Reyan 2, respectively. Samples were collected after self-cross and cross-pollination. The difference of pollen tube growth between the two groups was compared by fluorescence microscopy. The results showed that there were different degrees of curvature at the front end of the stigmas, the number of stigmas ranged from 3 to 5, and the pistil length was slightly larger than the stamen length. The length of pistil was positively correlated with the number and length of stamen. The single flower opening lasted for 5-8 d, and the time of pollen dispersal overlapped with the time of stigma receptivity. Pollen tube fluorescence observation showed that the growth rates of autocross and outcross pollen tubes of Reyan 3 Camellia hainanica were roughly the same in the early stage, and the growth rates of both reached the peak within 12-24 h after pollination. After 36 h, the growth length of hybrid pollen tube exceeded that of autocross pollen tube until it grew into ovary. 48 h after pollination, both inbred and outbred pollen tubes could reach the base of the style, and it was observed that the outbred pollen tubes could enter the ovary, but the growth rate of the inbred pollen tubes slowed down until the growth stopped at the base of the style near the ovary. The results would provide a theoretical basis for the variety configuration and efficient cultivation of C. hainanica.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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