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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >The pore of the leaf cavity of Azolla species: teat cell differentiation and cell wall projections
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The pore of the leaf cavity of Azolla species: teat cell differentiation and cell wall projections

机译:满江红种的叶腔孔:乳头细胞分化和细胞壁投影

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The differentiation of the specialized secretory teat cells of the leaf cavity pore of Azolla species was investigated at the ultrastructural level with emphasis on their peculiar cell wall projections. The results indicated that the projections are formed as soon as the teat cells complete their differentiation and that their production is principally associated with changes in endoplasmic reticulum profiles. The number of projections increases with the teat cell ape and is stimulated under salt and P deficiency stresses, Salt stress also promotes their emergence on Azolla species that under normal conditions do not produce projections. Cytochemical tests on different Azolla species showed that the projection composition is almost identical: proteins, acidic polysaccharides, and pectin are always detected. This study revealed that Azolla teat cell projections differ fundamentally from other types of hitherto described cell wall projections that are considered as remnant structures from cell separation. In contrast, in Azolla teat cells projections are actively produced and compounds are excreted by an exocytotic mechanism. The possible role of the projections in the symbiosis of Azolla spp, with Anabaena azollae is discussed. [References: 48]
机译:在超微结构水平上研究了满江红属种的叶腔孔的专业分泌乳头细胞的分化,并着重于它们独特的细胞壁投影。结果表明,只要奶头细胞完成分化,就形成了突起,并且突起的产生主要与内质网分布的变化有关。突起的数量随乳头细胞猿而增加,并在盐和磷缺乏胁迫下受到刺激。盐胁迫还促进了它们在正常条件下不产生突起的全果属物种上的出现。在不同的满江红属物种上进行的细胞化学测试表明,投射物的成分几乎相同:蛋白质,酸性多糖和果胶总是被检测到。这项研究表明,Azolla奶头细胞投射与迄今描述的其他类型的细胞壁投射从根本上不同,后者被认为是细胞分离的残余结构。相反,在Azolla奶嘴中,细胞突起活跃地产生,并且化合物通过胞吐机制排泄。讨论了这些预测在与偶氮鱼腥藻共生的共生物种中的可能作用。 [参考:48]

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