Genome-wide characterization of the cellulose synthase gene superfamily in Pyrus bretschneideri and reveal its potential
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ORIGINAL ARTICLE
Genome-wide characterization of the cellulose synthase gene superfamily in Pyrus bretschneideri and reveal its potential role in stone cell formation Guohui Li 1
&
Xin Liu 1 & Yuxuan Liang 2 & Yang Zhang 1 & Xi Cheng 1 & Yongping Cai 1
Received: 17 February 2020 / Revised: 20 June 2020 / Accepted: 27 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Members of the cellulose synthase (CesA) and cellulose synthase–like (Csl) families from the cellulose synthase gene superfamily participate in cellulose and hemicellulose synthesis in the plasma membrane. The members of this superfamily are vital for cell wall construction during plant growth and development. However, little is known about their function in pear fruit, a model for Rosaceae species and for fleshy fruit development. In our research, a total of 36 CesA/Csl family members were identified from the pear and were grouped into six subfamilies (CesA, CslB, CslC, CslD, CslE, and CslG) according to phylogenetic relationships. We performed a protein sequence physicochemical analysis, phylogenetic tree construction, a gene structure, a conserved domain, and chromosomal localization analysis. The results indicated that most of the CesA/Csl genes from pear are closely related to genes in Arabidopsis, but these families have unique characteristics in terms of their gene structure, chromosomal localization, phylogeny, and deduced protein sequences, suggesting that they have evolved through different processes. Tissue expression analysis results showed that most of the CesA/Csl genes were constitutively expressed at different levels in different organs. Furthermore, the expression levels of four genes (Pbr032894.2, Pbr016107.1, Pbr00518.1, and Pbr034218.1) tended to first increase and then decrease during fruit development, implying that these four genes may be involved in the development of stone cells of pear fruit. Our results may help elucidate the evolutionary history and functional differences of the CesA/Csl genes in pear and lay a foundation for further investigation of the CesA/Csl genes in pear and other Rosaceae species. Keywords Cellulose synthase gene . Evolutionary analysis . Expression patterns . Stone cells . Pear
Introduction Guohui Li and Xin Liu are the co-first authors Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10142-020-00747-8) contains supplementary material, which is available to authorized users. * Xi Cheng [email protected] * Yongping Cai [email protected] Guohui Li [email protected] Xin Liu [email protected] 1
School of Life Science, Anhui Agricultural University, No. 130, Changjiang West, Road, Hefei 230036, China
2
Faculty of Forestry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
The plant cell wall consists of three major polysaccharide components, cellulose, hemicellulose, and pectin, and lignin and protein are two additional components. In plants, cellulose is the main structural polysaccharide wall in the cell
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