Identification and substrate prediction of new Fragaria x ananassa aquaporins and expression in different tissues and during strawberry fruit development

查看全文 作　　者：Britt [1]Merlaen;Ellen De [2]Keyser;Marie-Christine Van [1]Labeke

机构地区：[1]Plant Production,Faculty of Bioscience Engineering,Ghent University,Coupure Links 653,9000,Gent,Belgium;[2]Flanders Research Institute for Agriculture Fisheries and Food(ILVO),Plant Sciences Unit,Caritasstraat 39,9090,Melle,Belgium

出　　处：《Horticulture Research》索引2018年第5卷第1期,共14页

摘　　要：The newly identified aquaporin coding sequences presented here pave the way for further insights into the plant–water relations in the commercial strawberry(Fragaria x ananassa).Aquaporins are water channel proteins that allow water to cross(intra)cellular membranes.In Fragaria x ananassa,few of them have been identified hitherto,hampering the exploration of the water transport regulation at cellular level.Here,we present new aquaporin coding sequences belonging to different subclasses:plasma membrane intrinsic proteins subtype 1 and subtype 2(PIP1 and PIP2)and tonoplast intrinsic proteins(TIP).The classification is based on phylogenetic analysis and is confirmed by the presence of conserved residues.Substrate-specific signature sequences(SSSSs)and specificity-determining positions(SDPs)predict the substrate specificity of each new aquaporin.Expression profiling in leaves,petioles and developing fruits reveals distinct patterns,even within the same(sub)class.Expression profiles range from leaf-specific expression over constitutive expression to fruit-specific expression.Both upregulation and downregulation during fruit ripening occur.Substrate specificity and expression profiles suggest that functional specialization exists among aquaporins belonging to a different but also to the same(sub)class. 关键词：FRAGARIA STRAW FIR

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Identification and substrate prediction of new Fragaria x ananassa aquaporins and expression in different tissues and during strawberry fruit development

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