title: A fasciclin-domain containing gene, ZeFLA11, is expressed exclusively in xylem elements that have reticulate wall thickenings in the stem vascular system of Zinnia elegans cv Envy.
abstract: The vascular cylinder of the mature stem of Zinnia elegans cv Envy contains two anatomically distinct sets of vascular bundles, stem bundles and leaf-trace bundles. We isolated a full-length cDNA of ZeFLA11, a fasciclin-domain-containing gene, from a zinnia cDNA library derived from in vitro cultures of mesophyll cells induced to form tracheary elements. Using RNA in situ hybridization, we show that ZeFLA11 is expressed in the differentiating xylem vessels with reticulate type wall thickenings and adjacent parenchyma cells of zinnia stem bundles, but not in the leaf-trace bundles that deposit spiral thickenings. Our results suggest a function for this cell-surface GPI-anchored glycoprotein in secondary wall deposition during differentiation of metaxylem tissue with reticulate vessels.
authors.affiliation: Department of Cell and Developmental Biology, John Innes Centre, Colney Lane, NR4 7UH Norwich, UK.
authors.forename: Preeti
authors.initials: P
authors.lastname: Dahiya
authors.forename: Kim
authors.initials: K
authors.lastname: Findlay
authors.forename: Keith
authors.initials: K
authors.lastname: Roberts
authors.forename: Maureen C
authors.initials: MC
authors.lastname: McCann
mesh_terms: D000595:Amino Acid Sequence; D019659:Asteraceae / Q000166:cytology / Q000235:genetics / Q000378:metabolism*; D002454:Cell Differentiation; D015723:Gene Library; D017403:In Situ Hybridization; D008562:Membrane Glycoproteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D008969:Molecular Sequence Data; D009088:Mucoproteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D010802:Phylogeny; D018515:Plant Leaves / Q000166:cytology / Q000235:genetics / Q000378:metabolism; D010940:Plant Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D018547:Plant Stems / Q000166:cytology / Q000235:genetics / Q000378:metabolism; D017434:Protein Structure, Tertiary; D016415:Sequence Alignment
chemical_list: D008562:Membrane Glycoproteins; D009088:Mucoproteins; D010940:Plant Proteins; C006619:arabinogalactan proteins