學術資源整合系統-相關推薦
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| 作者 | Tsai, Meng-Ying;Chen, Su-Hwa;Kao, Wen-Yuan |
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| 出版日期 | 201001 |
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| 著作名稱 | Floral morphs, pollen viability, and ploidy level of Oxalis corymbosa DC. in Taiwan
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| 刊名 | Botanical Studies |
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| 卷 | 51 |
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| 期 | 1 |
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| 頁數 | 81-88 |
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| 被收錄索引 | SCI |
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| 主題 | 植物 |
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| 摘要 | Oxalis corymbosa, an exotic species in Taiwan, is a tristylous plant, i.e., with long-(LS), mid-(MS) and short-styled (SS) floral morphs, producing capsules in its native habitat. However, in Taiwan, this species was never observed producing fruits, and it reproduces vegetatively. In this study we investigated floral morphs, observed fruit and seed production of 23 populations, assessed pollen viability, and analyzed the ploidy level of some populations of O. corymbosa, in an effort to understand the factors limiting sexual reproduction of this species in Taiwan. No fruit or seed production were observed in any population. The study of morph proportions revealed that ratios of SS, MS, and semi-homostylous (SHS) individuals varied among the populations, and LS individuals appeared to be absent in this region. Furthermore, two types of anthers were observed, yellow anthers with pollen grains and white anthers without pollen grains. In each population, individuals with MS morph and bearing yellow anthers were dominant. SS and SHS individuals were less frequent than MS morph and almost always bore white and male-sterile anthers. The result of fluorochromatic reaction essay revealed that these populations had very low pollen viability (＜4%). Flow cytometry analysis of cell nuclei suggested that individuals with MS and SS floral morph had same ploidy level. These results indicate that absence of LS floral morphs, the unequal proportion of floral morphs, low pollen viability, and the presence of male sterile morphs may all contribute to the absence of sexual reproduction of O. corymbosa in Taiwan. |
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| 資料連結 |  |
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| 系統號 | NO000006667 |
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