Background Cotton fiber is a model tissue for studying microtubule-associated proteins(MAPs).The Xklp2(TPX2)proteins that belong to the novel MAPs member mainly participate in the formation and development of microtub...Background Cotton fiber is a model tissue for studying microtubule-associated proteins(MAPs).The Xklp2(TPX2)proteins that belong to the novel MAPs member mainly participate in the formation and development of microtubule(MT).However,there is a lack of studies concerning the systematic characterization of the TPX2 genes family in cotton.Therefore,the identification and portrayal of G.hirsutum TPX2 genes can provide key targets for molecular manipula-tion in the breeding of cotton fiber improvement.Result In this study,TPX2 family genes were classified into two distinct subclasses TPXLs and MAP genes WAVE DAMP-ENED2-LIKE(WDLs)and quite conservative in quantity.GhWDL3 was significantly up-regulated in 15 days post anthe-sis fibers of ZRI-015(an upland cotton with longer and stronger fiber).GhWDL3 promotes all stem hairs to become straight when overexpressed in Arabidopsis,which may indirectly regulate cotton fiber cell morphology during fiber development.Virus induced gene silencing(VIGS)results showed that GhWDL3 inhibited fiber cell elongation at fiber development periods through regulating the expression of cell wall related genes.Conclusion These results reveal that GhWDL3 regulated cotton fiber cell elongation and provide crucial information for the further investigation in the regulatory mechanisms/networks of cotton fiber length.展开更多
OVATE Family Protein(OFP)是一类植物特异性转录因子,广泛参与植物的生长发育,其在棉花中的研究尚未见报道.本研究从陆地棉NDM8基因组中共鉴定到61个GhOFP基因,系统聚类将其分为6个亚组(CladeⅠ,Ⅱ,Ⅲ,Ⅳ,Ⅴ和Ⅵ).转录组和q RT-PCR分...OVATE Family Protein(OFP)是一类植物特异性转录因子,广泛参与植物的生长发育,其在棉花中的研究尚未见报道.本研究从陆地棉NDM8基因组中共鉴定到61个GhOFP基因,系统聚类将其分为6个亚组(CladeⅠ,Ⅱ,Ⅲ,Ⅳ,Ⅴ和Ⅵ).转录组和q RT-PCR分析表明,棉纤维发育的起始和伸长阶段高调表达的GhOFP基因主要分布在CladeⅡ亚组,且该亚组的GhOFP基因启动子含有促进伸长生长的赤霉素和生长素响应的顺式元件;在棉纤维发育的次级细胞壁加厚阶段高调表达的GhOFP基因主要分布在CladeⅥ亚组,且该亚组的GhOFP基因启动子含有参与细胞壁生长的脱落酸、茉莉酸和水杨酸响应的顺式元件.陆地棉GhOFP基因家族的全基因组鉴定和分析将为进一步研究棉花GhOFP基因在棉纤维发育过程中的生物学功能提供参考.展开更多
基金supported by the National Key Research and Development Program of China(2022YFD1200300)China Agriculture Research System(CARS-15-01).
文摘Background Cotton fiber is a model tissue for studying microtubule-associated proteins(MAPs).The Xklp2(TPX2)proteins that belong to the novel MAPs member mainly participate in the formation and development of microtubule(MT).However,there is a lack of studies concerning the systematic characterization of the TPX2 genes family in cotton.Therefore,the identification and portrayal of G.hirsutum TPX2 genes can provide key targets for molecular manipula-tion in the breeding of cotton fiber improvement.Result In this study,TPX2 family genes were classified into two distinct subclasses TPXLs and MAP genes WAVE DAMP-ENED2-LIKE(WDLs)and quite conservative in quantity.GhWDL3 was significantly up-regulated in 15 days post anthe-sis fibers of ZRI-015(an upland cotton with longer and stronger fiber).GhWDL3 promotes all stem hairs to become straight when overexpressed in Arabidopsis,which may indirectly regulate cotton fiber cell morphology during fiber development.Virus induced gene silencing(VIGS)results showed that GhWDL3 inhibited fiber cell elongation at fiber development periods through regulating the expression of cell wall related genes.Conclusion These results reveal that GhWDL3 regulated cotton fiber cell elongation and provide crucial information for the further investigation in the regulatory mechanisms/networks of cotton fiber length.
文摘OVATE Family Protein(OFP)是一类植物特异性转录因子,广泛参与植物的生长发育,其在棉花中的研究尚未见报道.本研究从陆地棉NDM8基因组中共鉴定到61个GhOFP基因,系统聚类将其分为6个亚组(CladeⅠ,Ⅱ,Ⅲ,Ⅳ,Ⅴ和Ⅵ).转录组和q RT-PCR分析表明,棉纤维发育的起始和伸长阶段高调表达的GhOFP基因主要分布在CladeⅡ亚组,且该亚组的GhOFP基因启动子含有促进伸长生长的赤霉素和生长素响应的顺式元件;在棉纤维发育的次级细胞壁加厚阶段高调表达的GhOFP基因主要分布在CladeⅥ亚组,且该亚组的GhOFP基因启动子含有参与细胞壁生长的脱落酸、茉莉酸和水杨酸响应的顺式元件.陆地棉GhOFP基因家族的全基因组鉴定和分析将为进一步研究棉花GhOFP基因在棉纤维发育过程中的生物学功能提供参考.
