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Phylogenetically Distinct Cellulose Synthase Genes Support Secondary Wall Thickening in Arabidopsis Shoot Trichomes and Cotton Fiber

查看全文 作　　者：Lissete [1]Betancur;Bir [2]Singh;Ryan [3]A.Rapp;Jonathan [3]F.Wendel;M. David [4]Marks;Alison [5]W.Roberts;Candace [1,2]H.Haigler 高影响力作者 机构地区：[1]Department of Plant Biology,North Carolina State University;[2]Department of Crop Science,North Carolina State University;[3]EEOB Department, Iowa State University;[4]Department of Plant Biology,University of Minnesota;[5]Department of Biological Sciences,CBLS,University of Rhode Island高影响力机构 出　　处：《Journal of Integrative Plant Biology》索引2010年第52卷第2期,共16页高影响力期刊 基　　金：Research support was provided by Cotton Incorporated, Cary, NC and the NSF Plant Genome Program 摘　　要：Through exploring potential analogies between cotton seed trichomes (or cotton fiber) and arabidopsis shoot trichomes we discovered that CesAs from either the primary or secondary wall phylogenetic clades can support secondary wall thickening. CesA genes that typically support primary wall synthesis, AtCesA1,2,3,5, and 6, underpin expansion and secondary wall thickening of arabidopsis shoot trichomes. In contrast, apparent orthologs of CesA genes that support secondary wall synthesis in arabidopsis xylem, AtCesA4,7, and 8, are up-regulated for cotton fiber secondary wall deposition. These conclusions arose from: (a) analyzing the expression of CesA genes in arabidopsis shoot trichomes; (b) observing birefringent secondary walls in arabidopsis shoot trichomes with mutations in AtCesA4, 7, or 8; (c) assaying up-regulated genes during different stages of cotton fiber development; and (d) comparing genes that were co-expressed with primary or secondary wall CesAs in arabidopsis with genes upregulated in arabidopsis trichomes, arabidopsis secondary xylem, or cotton fiber during primary or secondary wall deposition. Cumulatively, the data show that: (a) the xylem of arabidopsis provides the best model for secondary wall cellulose synthesis in cotton fiber; and (b) CesA genes within a 'cell wall toolbox' are used in diverse ways for the construction of particular specialized cell walls. 关 键 词：纤维素酶基因 拟南芥 次生壁 棉纤维 表皮毛 增厚 系统发育 次生木质部
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