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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Links between early pollen development and aperture pattern in monocots
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Links between early pollen development and aperture pattern in monocots

机译：单子叶植物早期花粉发育与孔径模式之间的联系

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摘要

Although the pollen grains produced in monocots are predominantly monosulcate (or monoporate), other aperture types are also found within this taxonomic group, such as the trichotomosulcate, inaperturate, zonaperturate, di-, or triaperturate types. The aperture pattern is determined during the young-tetrad stage of pollen development and it is known that some features of microsporogenesis can constrain the aperture type. For example, trichotomosulcate pollen is always associated with simultaneous cytokinesis, a condition considered as derived in the monocots. Our observations of the microsporogenesis pathway in a range of monocot species show that this pathway is surprisingly variable. Our results, however preliminary, reveal that variation in microsporogenesis concerns not only cytokinesis but also callose deposition among the microspores and shape of the tetrads. The role played by these features in aperture pattern determination is discussed.
机译：尽管在单子叶植物中产生的花粉粒主要是单硫酸盐（或单孔的），但在该分类学组中还发现了其他孔类型，例如三卵圆的，无孔的，带孔的，双孔的或三孔的。在花粉发育的年轻到第四阶段确定孔径模式，并且已知微孢子发生的某些特征可以限制孔径类型。例如，毛果三花粉总是与同时胞质分裂有关，这种情况被认为是源自单子叶植物。我们对一系列单子叶植物物种中的微孢子发生途径的观察表明，该途径出乎意料地可变。我们的结果，无论是初步的，还是揭示了微孢子发生的变化不仅涉及胞质分裂，而且还涉及小孢子之间的call质沉积和四分体的形状。讨论了这些特征在光圈图案确定中的作用。

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