Genome-wide analysis of purple acid phosphatase structure and expression in ten vegetable species.

Abstract:

BACKGROUND:Acquisition of external phosphorus (P) and optimisation of internal P are essential for plant growth and development, and insufficient availability of P in soils is a major challenge in agriculture. Members of the purple acid phosphatase (PAP) family of enzymes are candidates for increasing P use efficiency. Herein, we identified PAP homologs in the genomes of 10 vegetable species, along with Arabidopsis thaliana and Amborella trichopoda as references, to provide fundamental knowledge for this family. RESULTS:Phylogenetic analysis of protein sequences revealed nine distinct clades, indicating that functional differentiation of extant PAPs was established prior to the emergence of early angiosperms, and conserved among homologs in each clade. Analysis of transcript abundance in different tissues (root, stem, leaf, flower, and fruit) and following phosphates (Pi) starvation treatments from published RNA-seq transcriptome datasets facilitated comprehensive evaluation of expression patterns, and some groups of tissue-specific and Pi starvation-induced PAPs were characterised. Conserved motifs identified from upstream sequences of homologs that are highly expressed in particular tissues or following starvation treatment suggests that divergence in PAP gene expression is associated with cis-acting elements in promoters. CONCLUSIONS:The genome-wide analysis of PAP enzyme structure and transcriptional expression patterns advance our understanding of PAP family in vegetables genomes. Therefore, PAP homologs with known enzyme structures and expression profiles could serve as targets for plant breeding and/or genetic engineering programs to improve P acquisition and use.

journal_name

BMC Genomics

journal_title

BMC genomics

authors

Xie L,Shang Q

doi

10.1186/s12864-018-5022-1

subject

Has Abstract

pub_date

2018-08-31 00:00:00

pages

646

issue

1

issn

1471-2164

pii

10.1186/s12864-018-5022-1

journal_volume

19

pub_type

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