Search Results - (Author, Cooperation:A. B. Bleecker)
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1T. Xu ; N. Dai ; J. Chen ; S. Nagawa ; M. Cao ; H. Li ; Z. Zhou ; X. Chen ; R. De Rycke ; H. Rakusova ; W. Wang ; A. M. Jones ; J. Friml ; S. E. Patterson ; A. B. Bleecker ; Z. Yang
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-03-01Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Arabidopsis/*enzymology/genetics ; Cell Membrane/*enzymology ; Indoleacetic Acids/*metabolism ; Plant Leaves/enzymology/genetics ; Plant Proteins/*metabolism ; Protein Kinases/genetics/*metabolism ; Receptors, Cell Surface/*metabolism ; Signal Transduction ; rho GTP-Binding Proteins/*metabolismPublished by: -
2Staff View
ISSN: 1432-2048Keywords: Cell division ; Cell elongation ; Intercalary meristem ; Meristem (intercalary) ; Oryza (internode growth) ; SubmergenceSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract Submergence of the stem induces rapid internodal elongation in deepwater rice (Oryza sativa L. cv. “Habiganj Aman II”). A comparative anatomical study of internodes isolated from airgrown and partially submerged rice plants was undertaken to localize and characterize regions of growth and differentiation in rice stems. Longitudinal sections were examined by light and scanning-electron microscopy. Based on cell-size analysis, three zones of internodal development were recognized: a zone of cell division and elongation at the base of the internode, designated the intercalary meristem (IM); a zone of cell elongation without concomitant cell division; and a zone of cell differentiation where neither cell division nor elongation occur. The primary effects of submergence on internodal development were a threefold increase in the number of cells per cell file resulting from a decrease in the cell-cycle time from 24 to 7 h within the IM; an expansion of the cell-elongation zone from 5 to 15 mm leading to a threefold greater final cell length; and a suppression of tissue differentiation as indicated by reduced chlorophyll content and a lack of secondary wall formation in xylem and cortical sclerenchyma. These data indicate that growth of deepwater-rice internoes involves a balance between elongation and differentiation of the stem. Submergence shifts this balance in favor of growth.Type of Medium: Electronic ResourceURL: