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首页> 外文期刊>Journal of Experimental Botany >The plasma membrane H+-ATPase gene family in Solanum tuberosum L. Role of PHA1 in tuberization
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The plasma membrane H+-ATPase gene family in Solanum tuberosum L. Role of PHA1 in tuberization

机译：Solanum Tuberosum L的血浆膜H + -ATPase基因家族L. PHA1在结节化中的作用

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摘要

This study presents the characterization of the plasma membrane (PM) H+-ATPases in potato, focusing on their role in stolon and tuber development. Seven PM H+-ATPase genes were identified in the Solanum tuberosum genome, designated PHA1-PHA7. PHA genes show distinct expression patterns in different plant tissues and under different stress treatments. Application of PM H+-ATPase inhibitors arrests stolon growth, promotes tuber induction, and reduces tuber size, indicating that PM H+-ATPases are involved in tuberization, acting at different stages of the process. Transgenic potato plants overexpressing PHA1 were generated (PHA1-OE). At early developmental stages, PHA1-OE stolons elongate faster and show longer epidermal cells than wild-type stolons; this accelerated growth is accompanied by higher cell wall invertase activity, lower starch content, and higher expression of the sucrose-H+ symporter gene StSUT1. PHA1-OE stolons display an increased branching phenotype and develop larger tubers. PHA1-OE plants are taller and also present a highly branched phenotype. These results reveal a prominent role for PHA1 in plant growth and development. Regarding tuberization, PHA1 promotes stolon elongation at early stages, and tuber growth later on. PHA1 is involved in the sucrose-starch metabolism in stolons, possibly providing the driving force for sugar transporters to maintain the apoplastic sucrose transport during elongation.
机译：该研究介绍了马铃薯中血浆膜（PM）H + -ATP酶的表征，重点关注其在Stolon和块茎发育中的作用。在Solanum Tuberosum基因组中鉴定出七个PM H + -ATP酶基因，命名为PHA1-PHA7。 PHA基因显示不同植物组织和不同应力处理的不同表达模式。 PM H H + -ATPase抑制剂的应用抑制了Stolon生长，促进了块茎诱导，并减少了块茎大小，表明PM H + -AtPase参与了核化，在该过程的不同阶段作用。产生过表达PHA1的转基因马铃薯植物（PHA1-OE）。在早期发育阶段，PHA1-OE Stolons伸长速度并显示比野生型匍匐茎更长的表皮细胞;该加速的生长伴随着更高的细胞壁倒转酶活性，较低的淀粉含量和蔗糖-H + Symporter基因STSUT1的更高表达。 PHA1-OE Stolons显示增加的分支表型并开发较大的块茎。 PHA1-OE植物较高，并且还具有高度分枝的表型。这些结果揭示了Pha1在植物生长和发展中的突出作用。关于核化，PHA1促进早期阶段的匍匐伸长率，肿块延长稍后。 PHA1参与斯托隆的蔗糖 - 淀粉代谢，可能为糖转运蛋白提供驱动力，以在伸长期间保持饲料蔗糖运输。

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