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- W2188976475 abstract "Protein dephosphorylation mediated by protein phosphatases plays a major role in signal transduction of plantresponsestoenvironmentalstresses.Inthisstudy,twoputativeproteinphosphatases,PvPS2:1and PvPS2:2 were identified and characterized in bean (Phaseolus vulgaris). The two PvPS2 members were found to be localized to the plasma membrane and the nucleus by transient expression of PvPS2:GFP in onion epidermal cells. Transcripts of the two PvPS2 genes were significantly increased by phosphate (Pi) starvation in the two bean genotypes, G19833 (a P-efficient genotype) and DOR364 (a P-inefficient genotype). However, G19833 exhibited higher PvPS2:1 expression levels than DOR364 in both leaves and roots during Pi starvation. Increased transcription of PvPS2:1 in response to Pi starvation was further verified through histochemical analysis of PvPS2:1 promoter fusion s-glucuronidase (GUS) in transgenic Arabidopsis plants. Analysis of PvPS2:1 overexpression lines in bean hairy roots and Arabidopsis showed that PvS2:1 was involved in root growth and P accumulation. Furthermore, expression levels of two Pi starvation responsive genes were upregulated and the APase activities were enhanced in the overexpressing PvPS2:1 Arabidopsis lines. Taken together, our results strongly suggested that PvPS2:1 positively regulated plant responses to Pi starvation, and could be further targeted as a candidate gene to improve crop P efficiency." @default.
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- W2188976475 date "2012-01-01" @default.
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- W2188976475 title "Research Article Characterization of Two Putative Protein Phosphatase Genes and Their Involvement in Phosphorus Efficiency in Phaseolus vulgaris" @default.
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