Overexpression of V-type H ⁺ pyrophosphatase gene EdVP1 from Elymus dahuricus increases yield and potassium uptake of transgenic wheat under low potassium conditions.

Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: MEDLINE

Original Publication: London : Nature Publishing Group, copyright 2011-

Gene Expression* ; Gene Expression Regulation, Plant*; Elymus/*genetics ; Inorganic Pyrophosphatase/*genetics ; Plants, Genetically Modified/*genetics ; Plants, Genetically Modified/*metabolism ; Potassium/*metabolism ; Triticum/*genetics ; Triticum/*metabolism; Plant Roots/genetics ; Plant Roots/metabolism ; Plant Shoots/genetics ; Plant Shoots/metabolism

Lack of potassium in soil limits crop yield. Increasing yield and conserving potassium ore requires improving K use efficiency (KUE). Many genes influence KUE in plants, but it is not clear how these genes function in the field. We identified the V-type H ⁺ -pyrophosphatase gene EdVP1 from Elymus dahurica. Gene expression analysis showed that EdVP1 was induced by low potassium stress. Protein subcellular localization analysis demonstrated that EdVP1 localized on the plasma membrane. We overexpressed EdVP1 in two wheat varieties and conducted K tolerance experiments across years. Yield per plant, grain number per spike, plant height, and K uptake of four transgenic wheat lines increased significantly compared with WT; results from two consecutive years showed that EdVP1 significantly increased yield and KUE of transgenic wheat. Pot experiments showed that transgenic plants had significantly longer shoots and roots, and higher K accumulation in shoots and roots and H ⁺ -PPase activity in shoots than WT under low K. A fluidity assay of potassium ion in EdVP1 transgenic plant roots showed that potassium ion influx and H ⁺ outflow in transgenic plants were higher than WT. Overexpressing EdVP1 significantly improved yield and KUE of transgenic wheat and was related to higher K uptake capacity in root.

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EC 3.6.1.1 (Inorganic Pyrophosphatase)
RWP5GA015D (Potassium)

Date Created: 20200321 Date Completed: 20201210 Latest Revision: 20210319

20231215

PMC7081212

10.1038/s41598-020-62052-5

32193452