article id 62,
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                        Research article
                    
        
                                    
                                    
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                            Vascular cambium is the lateral meristem producing xylem cells inwards  and phloem cells outwards in plant stem. Thus, in trees, the quality and  quantity of wood is a result of highly regulated developmental process  depending initially on the vascular cambium cell production. The  availability of accurate transcriptomics technologies based on high  coverage sequencing raises the level of expectations on tissue sampling  to a very high degree. What is the benefit of top-level transcriptomics  in wood formation studies if we are using these technologies on raw  tissues, mixing cells at the organ level or even higher scale? The  presented work describes a nine-step procedure, from standing tree to  isolated ray and fusiform cells from cryolyophilized tangential sections  of the poplar cambial zone. The aim of this paper is to present a step  by step procedure including advices on how to select the optimal tree,  how to fell the tree while securing its physiological parameters, how to  cryolyophilize and microdissect under binocular, presenting the time  schedule of the whole process and RNA analysis.
                        
                
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                            Goué,
                            UMR5546 CNRS-Université Paul Sabatier, Castanet Tolosan, France; (INRA-UAGPF, 2163 Avenue de la Pomme de Pin, 45075 Orléans cedex 2, France)
                                                        E-mail:
                                                            goue@lrsv.ups-tlse.fr
                                                                                          
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                            Noël-Boizot,
                            INRA-UAGPF, 2163 Avenue de la Pomme de Pin, 45075 Orléans cedex 2, France
                                                        E-mail:
                                                            nnb@nn.fr
                                                                                
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                            Vallance,
                            INRA-UAGPF, 2163 Avenue de la Pomme de Pin, 45075 Orléans cedex 2, France
                                                        E-mail:
                                                            mv@nn.fr
                                                                                
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                            Magel,
                            Universität Hamburg, Zentrum Holzwirtschaft, Deutschland
                                                        E-mail:
                                                            em@nn.de
                                                                                
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                            Label,
                            INRA-UAGPF, 2163 Avenue de la Pomme de Pin, 45075 Orléans cedex 2, France
                                                        E-mail:
                                                            pl@nn.fr