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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Effects of relative humidity and temperature conditions on pollen fluorochromatic reaction of Rosmarinus officinalis L. (Lamiaceae)
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Effects of relative humidity and temperature conditions on pollen fluorochromatic reaction of Rosmarinus officinalis L. (Lamiaceae)

机译：相对湿度和温度条件对迷迭香（Rosmarinus officinalis L。）（Lamiaceae）花粉荧光反应的影响

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摘要

Mediterranean ecosystems are characterized by seasonal and annual fluctuations in humidity and temperature which are considered limiting factors for plant growth and might have played a key role in the selection of species that compose the present vegetation. After anther release, pollen is generally exposed to various changes of temperature and humidity conditions, therefore its viability and consequently successful fruit set are strongly affected by these environmental parameters. The aim of this research was to study the effect of different combinations of humidity and temperature on pollen membrane integrity of Rosmarinus officinalis L. in order to investigate possible relations between pollen features and climatic conditions during flowering. This species is an evergreen perennial shrub, occurring among the sclerophyllous vegetation of Mediterranean maquis. In many areas of Southern Italy, it shows a flowering period starting from the beginning of winter and spreading throughout spring months. The analysis of data showed that duration of pollen viability of R. officinalis is enhanced by the co-occurrence of low temperature and high humidity. Moreover, these conditions are able to newly raise the viability of pollen kept at higher temperatures and lower humidity. These observations indicate that reactivation of the pollen membrane depends on low temperature apart from high humidity. Therefore "vernalization" of rosemary pollen enhances its viability, supporting that pollen behavior is adapted to winter condition and allows flowering in winter and early spring.
机译：地中海生态系统的特征是湿度和温度的季节性和年度波动，这被认为是限制植物生长的因素，可能在构成当前植被的物种选择中发挥了关键作用。花药释放后，花粉通常会暴露在温度和湿度条件的各种变化下，因此，这些环境参数会严重影响花粉的生存能力以及因此而获得的成功坐果。这项研究的目的是研究湿度和温度的不同组合对迷迭香花粉膜完整性的影响，以研究开花过程中花粉特征与气候条件之间的可能关系。该物种是常绿的多年生灌木，出现在地中海侯爵的硬叶植物之间。在意大利南部的许多地区，它显示了从冬季开始到春季整个开花期的开花期。数据分析表明，低温和高湿并存会增加红景天花粉生存能力的持续时间。而且，这些条件能够重新提高保持在较高温度和较低湿度下的花粉的生存力。这些观察结果表明花粉膜的重新活化取决于除高湿度之外的低温。因此，迷迭香花粉的“春化处理”增强了其活力，支持花粉行为适应冬季条件并允许在冬季和早春开花。

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