Autogamy of an endangered species: loropetalum subcordatum (hamamelidaceae)
文献类型：期刊论文
| 作者 | Gu, Lei1,2; Zhang, Dian-Xiang1 |
| 刊名 | Journal of systematics and evolution
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 46期号:5页码:651-657 |
| 关键词 | Autogamy Hamamelidaceae Loropetalum subcordatum |
| ISSN号 | 1674-4918 |
| DOI | 10.3724/sp.j.1002.2008.08029 |
| 通讯作者 | Zhang, dian-xiang(dx-zhang@scib.ac.cn) |
| 英文摘要 | The reproductive biology of loropetalum subcordatum was studied. the floral phenology, pollen histochemistry, pollen-ovule ratio (p/o), pollen viability and floral visitors were investigated and determined. assisted pollination experiments were carried out to examine the breeding system of l. subcordatum. scanning electron microscopy (sem) and fluorescence microscopy (fm) were employed to check the pollen germination and the growth of pollen tubes. results were obtained as follows: (1) the flowering period of l. subcordatum was from september to the next february with a peak at september-october; the longevity of a single flower was 4-6 days. (2) l. subcordatum was protogynous, and pollen grains could be found on self-stigmata when the anthers opened 12-24 h after petals unrolling. (3)the pollen viability (mtt test) maintained for ca. 26 hours; the pollen was starchless; the p/o was 8420 +/- 720.86 (n=10); no nectar secretion was observed. (4) thrips (thrips sp.) were the only floral visitors observed but which seldom moved among inflorescences, thus played limited role in pollination. (5) fruit sets of untreated bagged (5.30 +/- 1.83%) and hand assisted cross pollinated flowers (6.67 +/- 1.91%) were not significantly different from that of open flowers (4.79 +/- 1.45%). (6) sem and fm observations proved that pollen germinated on self-stigmata and pollen tubes growed in self-styles. the results indicated that l. subcordatum was facultatively autogamous and without apomixes. the possibility of outcrossing and the protogyny might indicate that the species was originally a crosser. flowers pollinated in september-october usually start ovule growth in next summer, and set mature fruits in next october (after the next flowering peak), suggesting the occurrence of retard embryo development. the possibility that autogamy in hamamelidaceae could have been developed from fly pollination was also discussed. |
| WOS关键词 | POLLEN-OVULE RATIOS ; REPRODUCTIVE-BIOLOGY ; POLLINATION ECOLOGY ; THRIPS POLLINATION ; BREEDING SYSTEMS ; FLOWERING PLANTS ; VIRGINIANA ; DIVERSITY |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000261269100001 |
| 出版者 | WILEY PERIODICALS, INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2387704 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang, Dian-Xiang |
| 作者单位 | 1.Chinese Acad Sci, S China Bot Garden, Guangzhou 510650, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gu, Lei,Zhang, Dian-Xiang. Autogamy of an endangered species: loropetalum subcordatum (hamamelidaceae)[J]. Journal of systematics and evolution,2008,46(5):651-657. |
| APA | Gu, Lei,&Zhang, Dian-Xiang.(2008).Autogamy of an endangered species: loropetalum subcordatum (hamamelidaceae).Journal of systematics and evolution,46(5),651-657. |
| MLA | Gu, Lei,et al."Autogamy of an endangered species: loropetalum subcordatum (hamamelidaceae)".Journal of systematics and evolution 46.5(2008):651-657. |
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来源：中国科学院大学
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