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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Pollen carbohydrates and water content during development, presentation, and dispersal: a short review
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Pollen carbohydrates and water content during development, presentation, and dispersal: a short review

机译：发育，表现和传播过程中花粉的碳水化合物和水含量：简短回顾

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摘要

Pollen accumulates starch reserves during development and the final stage of ripening. Before the anther opens, starch is totally or partially converted to pectins, glucose, fructose, sucrose, and to some unknown polysaccharides. Pollen is exposed to dispersing agents in an arrested developmental state which differs according to pollen water content. Pollen is classified as partially dehydrated or partially hydrated. The final water content may be reached before or after anther opening. Especially during exposure and dispersal, partially dehydrated pollen may interconvert soluble and insoluble reserves, modifying internal turgor pressure and hindering water loss or gain. Partially hydrated pollen is commonly devoid of mechanisms to conserve viability in time but has the advantage of quickly emitting pollen tubes on reaching the stigma.
机译：花粉在发育和成熟的最后阶段积累淀粉储备。在花药打开之前，淀粉被全部或部分转化为果胶，葡萄糖，果糖，蔗糖和一些未知的多糖。花粉以停滞的发育状态暴露于分散剂中，该发育状态根据花粉的含水量而有所不同。花粉被分类为部分脱水或部分水合。在打开花药之前或之后可以达到最终的含水量。尤其是在暴露和分散过程中，部分脱水的花粉可能会相互转化可溶和不可溶的储备，从而改变内部膨胀压力并阻碍水的流失或获得。部分水合的花粉通常缺乏及时保存活力的机制，但具有在到达柱头时迅速释放花粉管的优点。

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