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首页> 外文期刊>Journal of Experimental Botany >A survey of Populus PIN-FORMED family genes reveals their diversified expression patterns
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A survey of Populus PIN-FORMED family genes reveals their diversified expression patterns

机译：一项对胡杨针形成家族基因的调查显示了它们的多样化表达模式

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摘要

The plant hormone auxin is a key regulator of plant development, and its uneven distribution maintained by polar intercellular auxin transport in plant tissues can trigger a wide range of developmental processes. Although the roles of PIN-FORMED (PIN) proteins in intercellular auxin flow have been extensively characterized in Arabidopsis, their roles in woody plants remain unclear. Here, a comprehensive analysis of PIN proteins in Populus is presented. Fifteen PINs are encoded in the genome of Populus, including four PIN1s, one PIN2, two PIN3s, three PIN5s, three PIN6s, and two PIN8s. Similar to Arabidopsis AtPIN proteins, PtPINs share conserved topology and transmembrane domains, and are either plasma membrane- or endoplasmic reticulum-localized. The more diversified expansion of the PIN family in Populus, comparing to that in Arabidopsis, indicates that some auxin-regulated developmental processes, such as secondary growth, may exhibit unique features in trees. More importantly, different sets of PtoPINs have been found to be strongly expressed in the roots, leaves, and cambium in Populus; the dynamic expression patterns of selected PtoPINs were further examined during the regeneration of shoots and roots. This genome-wide analysis of the Populus PIN family provides important cues for their potential roles in tree growth and development.
机译：植物激素生长素是植物发育的关键调节剂，通过极性细胞间生长素在植物组织中的运输而维持的不均匀分布会触发广泛的发育过程。尽管在拟南芥中已广泛表征了PIN-FORMED（PIN）蛋白在细胞间生长素流中的作用，但它们在木本植物中的作用仍不清楚。在此，对胡杨中的PIN蛋白进行了全面的分析。在胡杨的基因组中编码了15个PIN，包括四个PIN1，一个PIN2，两个PIN3，三个PIN5，三个PIN6和两个PIN8。与拟南芥AtPIN蛋白类似，PtPINs共享保守的拓扑结构和跨膜结构域，并且位于质膜或内质网中。与拟南芥中的相比，胡杨中PIN家族的多样性更加多样化，这表明某些植物生长素调节的发育过程（例如次级生长）可能在树木中表现出独特的特征。更重要的是，已发现在胡杨的根，叶和形成层中强烈表达了不同的PtoPIN集。在芽和根再生期间，进一步检查了选定的PtoPIN的动态表达模式。对Populus PIN家族的全基因组分析为它们在树木生长和发育中的潜在作用提供了重要线索。

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