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首页> 外文期刊>植物研究雑誌 >Floral Dimorphism in Psychotria boninensis Nakai (Rubiaceae) Endemic to the Bonin (Ogasawara) Islands
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Floral Dimorphism in Psychotria boninensis Nakai (Rubiaceae) Endemic to the Bonin (Ogasawara) Islands

机译：Bonin（Ogasawara）群岛特有的Psychotria boninensis Nakai（Rubiaceae）的花型二态性

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摘要

Floral and reproductive characters were examined to determine mode of dimorphism in the flowers of Psychotria boninensis Nakai, a species endemic to the Bonin (Ogasawara) Islands, Japan. The flowers reciprocally differed in stigma and anther height, and were composed of long- and short-styled morphs. Pollen grains from the short-styled morph were larger than those from the long-styled morph in size, but no major difference was found between the two morphs in exine sculpture. The short-styled flowersproduced less pollen grain than the long-styled flowers, as in some other typically distylous species. The pollen grains produced by the two morphs were positively stained with Cotton Blue solution, and ovaries of the two morphs produced fruits and seedsin field. These results suggest that the flowers of P. boninensis are morphologically distylous, as in most of the typically distylous species, and that the long- and short-styled flowers are functionally bisexual. This is the first record of distyly among the plants endemic to the Bonin Islands.
机译：检查了花卉和生殖特性，以确定日本精神病博尼（小gas原）群岛特有种博尼（Psychotria boninensis Nakai）花的二态性模式。花的柱头和花药高度互不相同，由长型和短型变体组成。短型变体的花粉粒比长型变体的花粉粒大，但外壁雕塑的两个变体之间没有发现主要差异。像其他一些典型的杂种一样，短花比长花产生的花粉粒少。用棉蓝溶液对两种变体产生的花粉粒进行阳性染色，两种变体的卵巢产生果实和种子。这些结果表明，P。boninensis的花在形态上是杂散的，就像大多数典型的杂散种一样，长型和短型花在功能上是双性恋的。这是波宁群岛特有植物中肮脏的第一个记录。

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