Abstract:
BACKGROUND:NADP-malic enzyme (NAPD-ME), and pyruvate orthophosphate dikinase (PPDK) are important enzymes that participate in C4 photosynthesis. However, the evolutionary history and forces driving evolution of these genes in C4 plants are not completely understood. RESULTS:We identified 162 NADP-ME and 35 PPDK genes in 25 species and constructed respective phylogenetic trees. We classified NADP-ME genes into four branches, A1, A2, B1 and B2, whereas PPDK was classified into two branches in which monocots were in branch I and dicots were in branch II. Analyses of selective pressure on the NAPD-ME and PPDK gene families identified four positively selected sites, including 94H and 196H in the a5 branch of NADP-ME, and 95A and 559E in the e branch of PPDK at posterior probability thresholds of 95%. The positively selected sites were located in the helix and sheet regions. Quantitative RT-PCR (qRT-PCR) analyses revealed that expression levels of 6 NADP-ME and 2 PPDK genes from foxtail millet were up-regulated after exposure to light. CONCLUSION:This study revealed that positively selected sites of NADP-ME and PPDK evolution in C4 plants. It provides information on the classification and positive selection of plant NADP-ME and PPDK genes, and the results should be useful in further research on the evolutionary history of C4 plants.
journal_name
BMC Plant Bioljournal_title
BMC plant biologyauthors
Shi W,Yue L,Guo J,Wang J,Yuan X,Dong S,Guo J,Guo Pdoi
10.1186/s12870-020-02339-xsubject
Has Abstractpub_date
2020-03-30 00:00:00pages
132issue
1issn
1471-2229pii
10.1186/s12870-020-02339-xjournal_volume
20pub_type
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