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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Male sterility in Bambusa tuldoides Munro
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Male sterility in Bambusa tuldoides Munro

机译：Bambusa Tuldoides Munro的雄性不育

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摘要

Despite their great economic importance, relatively little is known about bamboo sexual reproduction because they usually spread through rhizomes and have long intervals between flowering periods. Bambusa tuldoides is no exception; the intervals between flowering periods are about 23 years and often do not result in successful caryopsis production. The aim of the present work was to characterize Bambusa tuldoides sexual reproduction at three stages of flower development and investigate possible male sterility. Pollen was cultured onto several types of culture medium in order to encourage germination, but not a single of the thousands of observed pollen germinated under any condition. Anthers and microspores were analyzed by scanning electron microscopy, transmission electron microscopy, and optical microscopy techniques. Anther dehiscence appeared to be normal when compared to other species. In contrast, microspores began to develop abnormally starting as early as the first flower development stage: retraction of the cytoplasm and rupture of the nuclear and mitochondria membrane. As the interior machinery of the microspores degenerated, starch accumulated within numerous amyloplasts during stages two to four of flower development. The sporoderms of these microspores were similarly incomplete: though they possessed an exine, they lacked an intine. The results here obtained suggest that the non-viability of these abnormal pollen grains prevents the development of Bambusa tuldoides caryopses.
机译：尽管经济重视很高，但相对较少地了解竹形性繁殖，因为它们通常通过根茎传播并在开花时期之间具有长期间隔。 Bambusa Tuldoides也不例外;开花时期之间的间隔约为23年，并且通常不会导致成功的Caryopsis生产。本工作的目的是在花开发的三个阶段表征Bambusa Tuldoides性繁殖，并调查可能的雄性不育性。花粉培养到几种类型的培养基上，以促进发芽，但不是在任何条件下发芽的数以千计的花粉。通过扫描电子显微镜，透射电子显微镜和光学显微镜技术分析了花药和幼儿孢子。与其他物种相比，花药裂开似乎是正常的。相比之下，Micromowes早早开始发生异常从第一朵花发育阶段开始：核和线粒体膜的细胞质收缩和破裂。作为肌孢子的内部机械退化，淀粉在两到四个花发育中的阶段期间累积在众多淀粉片内。这些微微孢子的Sporoderms同样不完整：虽然他们拥有外来，但它们缺乏一个内部。这里得到的结果表明，这些异常花粉粒的不活力可防止班普萨·蒂瓦多斯·凯里波斯的发展。

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