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Tytuł:
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Microtubule arrays and Arabidopsis stomatal development.
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Autorzy:
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Lucas JR; Department of Plant Cellular and Molecular Biology, Ohio State University, Columbus, Ohio 43210, USA.
Nadeau JA
Sack FD
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Źródło:
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Journal of experimental botany [J Exp Bot] 2006; Vol. 57 (1), pp. 71-9. Date of Electronic Publication: 2005 Nov 22.
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Typ publikacji:
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Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
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Język:
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English
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Imprint Name(s):
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Original Publication: Oxford, UK : Oxford University Press,
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MeSH Terms:
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Arabidopsis/*growth & development
Microtubules/*physiology
Plant Epidermis/*growth & development
Plant Leaves/*growth & development
Arabidopsis/cytology ; Cell Division/physiology ; Cytoplasm/physiology ; Microscopy, Confocal ; Plant Epidermis/cytology ; Plant Leaves/cytology ; Signal Transduction
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Entry Date(s):
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Date Created: 20051124 Date Completed: 20060406 Latest Revision: 20061115
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Update Code:
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20240104
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DOI:
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10.1093/jxb/erj017
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PMID:
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16303827
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Microtubule arrays in living cells were analysed during Arabidopsis stomatal development in order to more closely define stages in the pathway and contexts where intercellular signalling might operate. Arabidopsis stomata are patterned iteratively via the orientation of an asymmetric division in a cell located next to an existing stoma. It was found that preprophase bands of microtubules (PPBs) were correctly placed away from stomata and from two types of precursor cells. This suggests that all three cell types participate in an intercellular signalling pathway that orients the division site. These and other asymmetric divisions in the pathway were preceded by a polarized cytoplasm, with the PPB around the nucleus at one end, and the vacuole at the other. PPBs before symmetric divisions of guard mother cells (GMCs) were broader than those in asymmetric divisions, and the GMC division site was marked by unusual end-wall thickenings. This work identifies an accessible system for studying cytoskeletal function and provides a foundation for analysing the role of genes involved in stomatal development.