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Int. J. Mol. Sci. 2018, 19(8), 2290;

Genome-Wide Identification and Analysis of Polygalacturonase Genes in Solanum lycopersicum

Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agricultural and Food Science, Zhejiang A&F University, Wusu Street 666, Lin’an, Hangzhou 311300, China
Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou 310058, China
These authors contributed equally to this work.
Authors to whom correspondence should be addressed.
Received: 13 July 2018 / Revised: 26 July 2018 / Accepted: 2 August 2018 / Published: 4 August 2018
(This article belongs to the Section Molecular Plant Sciences)
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Polygalacturonase (PG), a large hydrolase family in plants, is involved in pectin disassembly of the cell wall in plants. The present study aims to characterize PG genes and investigate their expression patterns in Solanum lycopersicum. We identified 54 PG genes in the tomato genome and compared their amino acid sequences with their Arabidopsis counterpart. Subsequently, we renamed these PG genes according to their Arabidopsis homologs. Phylogenetic and evolutionary analysis revealed that these tomato PG genes could be classified into seven clades, and within each clade the exon/intron structures were conserved. Expression profiles analysis through quantitive real-time polymerase chain reaction (qRT-PCR) revealed that most SlPGs had specific or high expression patterns in at least one organ, and particularly five PG genes (SlPG14, SlPG15, SlPG49, SlPG70, and SlPG71) associated with fruit development. Promoter analysis showed that more than three cis-elements associated with plant hormone response, environmental stress response or specific organ/tissue development exhibited in each SlPG promoter regions. In conclusion, our results may provide new insights for the further study of PG gene function during plant development. View Full-Text
Keywords: tomato; Solanum lycopersicum; polygalacturonase; gene family; phylogenetic analysis; expression analysis tomato; Solanum lycopersicum; polygalacturonase; gene family; phylogenetic analysis; expression analysis

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Ke, X.; Wang, H.; Li, Y.; Zhu, B.; Zang, Y.; He, Y.; Cao, J.; Zhu, Z.; Yu, Y. Genome-Wide Identification and Analysis of Polygalacturonase Genes in Solanum lycopersicum. Int. J. Mol. Sci. 2018, 19, 2290.

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