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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Cellular expansion and gene expression in the developing grape (Vitis vinifera L.)
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Cellular expansion and gene expression in the developing grape (Vitis vinifera L.)

机译：发育中的葡萄（Vitis vinifera L.）中的细胞扩增和基因表达

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摘要

Expression profiles of genes involved in cell wall metabolism and water transport were compared with changes in grape (Vitis vinifera L.) berry growth, basic chemical composition, and the shape, size, and wall thickness of cells within tissues of the berry pericarp. Expression of cell wall-modifying and aquaporin genes in berry pericarp, tissues generally followed a bimodal expression profile with high levels of expression coinciding with the two periods of rapid berry growth, stages I and III, and low levels of expression corresponding to the slow-growth period, stage H. Cellular expansion was observed throughout all tissues during stage I, and only mesocarp cellular expansion was observed during stage III. Expansion of only exocarp cells was evident during transition between stages II and III. Cell wall-modifying and aquaporin gene expression profiles followed similar trends in exocarp and mesocarp tissues throughout berry development, with the exception of the up-regulation of pectin methylesterase, pectate lyase, two aquaporin genes (AQ1 and AQ2), and two expansin genes (EXP3 and EXPL) during stage II, which was delayed in the exocarp tissue compared with mesocarp tissue. Exocarp endo-(1 -> 3)-beta-glucanase and expansin-like gene expression was concurrent with increases in epidermal and hypodermal cell wall thickness. These results indicate a potential role of the grape berry skin in modulating grape berry growth.
机译：将参与细胞壁代谢和水分运输的基因的表达谱与葡萄（Vitis vinifera L.）浆果生长，基本化学组成以及浆果果皮组织内细胞的形状，大小和壁厚的变化进行了比较。细胞壁修饰基因和水通道蛋白基因在浆果果皮中的表达通常遵循双峰表达模式，高水平的表达与浆果快速生长的两个阶段（I和III期）以及低水平的表达相对应，即缓慢的在阶段I期间，在所有组织中均观察到细胞膨胀，而在阶段III中，仅观察到中果皮细胞膨胀。在第二和第三阶段之间的过渡过程中，只有外果皮细胞明显扩张。除果胶甲基酯酶，果胶酸裂合酶，两个水通道蛋白基因（AQ1和AQ2）和两个expansin基因上调外，整个浆果发育过程中，细胞壁修饰和水通道蛋白基因表达谱在外果皮和中果皮组织中遵循相似的趋势。阶段II（EXP3和EXPL），相比于中果皮组织，外果皮组织的延迟。外果皮内-（1-> 3）-β-葡聚糖酶和expansin样基因表达与表皮和皮下细胞壁厚度增加同时发生。这些结果表明葡萄浆果皮在调节葡萄浆果生长中的潜在作用。

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