Spatio-temporal orientation of microtubules controls conical cell shape in Arabidopsis thaliana petals
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{"title"=>"Spatio-temporal orientation of microtubules controls conical cell shape in Arabidopsis thaliana petals", "type"=>"journal", "authors"=>[{"first_name"=>"Huibo", "last_name"=>"Ren", "scopus_author_id"=>"56535771600"}, {"first_name"=>"Xie", "last_name"=>"Dang", "scopus_author_id"=>"56956434900"}, {"first_name"=>"Xianzhi", "last_name"=>"Cai", "scopus_author_id"=>"57194720823"}, {"first_name"=>"Peihang", "last_name"=>"Yu", "scopus_author_id"=>"57194722111"}, {"first_name"=>"Yajun", "last_name"=>"Li", "scopus_author_id"=>"57194729175"}, {"first_name"=>"Shanshan", "last_name"=>"Zhang", "scopus_author_id"=>"57194717744"}, {"first_name"=>"Menghong", "last_name"=>"Liu", "scopus_author_id"=>"57194725217"}, {"first_name"=>"Binqing", "last_name"=>"Chen", "scopus_author_id"=>"57194717115"}, {"first_name"=>"Deshu", "last_name"=>"Lin", "scopus_author_id"=>"56535740000"}], "year"=>2017, "source"=>"PLoS Genetics", "identifiers"=>{"issn"=>"15537404", "scopus"=>"2-s2.0-85021803547", "pmid"=>"28644898", "doi"=>"10.1371/journal.pgen.1006851", "pui"=>"617190798", "isbn"=>"1111111111", "sgr"=>"85021803547"}, "id"=>"f249fcb0-f22b-3a8c-a508-b354af287406", "abstract"=>"The physiological functions of epidermal cells are largely determined by their diverse morphologies. Most flowering plants have special conical-shaped petal epidermal cells that are thought to influence light capture and reflectance, and provide pollinator grips, but the molecular mechanisms controlling conical cell shape remain largely unknown. Here, we developed a live-confocal imaging approach to quantify geometric parameters of conical cells in Arabidopsis thaliana (A. thaliana). Through genetic screens, we identified katanin (KTN1) mutants showing a phenotype of decreased tip sharpening of conical cells. Furthermore, we demonstrated that SPIKE1 and Rho of Plants (ROP) GTPases were required for the final shape formation of conical cells, as KTN1 does. Live-cell imaging showed that wild-type cells exhibited random orientation of cortical microtubule arrays at early developmental stages but displayed a well-ordered circumferential orientation of microtubule arrays at later stages. By contrast, loss of KTN1 prevented random microtubule networks from shifting into well-ordered arrays. We further showed that the filamentous actin cap, which is a typical feature of several plant epidermal cell types including root hairs and leaf trichomes, was not observed in the growth apexes of conical cells during cell development. Moreover, our genetic and pharmacological data suggested that microtubules but not actin are required for conical cell shaping. Together, our results provide a novel imaging approach for studying petal conical cell morphogenesis and suggest that the spatio-temporal organization of microtubule arrays plays crucial roles in controlling conical cell shape.", "link"=>"http://www.mendeley.com/research/spatiotemporal-orientation-microtubules-controls-conical-cell-shape-arabidopsis-thaliana-petals", "reader_count"=>12, "reader_count_by_academic_status"=>{"Researcher"=>4, "Student > Ph. D. Student"=>3, "Student > Master"=>4, "Student > Bachelor"=>1}, "reader_count_by_user_role"=>{"Researcher"=>4, "Student > Ph. D. Student"=>3, "Student > Master"=>4, "Student > Bachelor"=>1}, "reader_count_by_subject_area"=>{"Biochemistry, Genetics and Molecular Biology"=>2, "Agricultural and Biological Sciences"=>10}, "reader_count_by_subdiscipline"=>{"Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>10}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>2}}, "group_count"=>0}

Scopus | Further Information

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