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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/ers196
|2 doi
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|a eng
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|a Wenzel, C L
|e verfasserin
|4 aut
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|a Ectopic divisions in vascular and ground tissues of Arabidopsis thaliana result in distinct leaf venation defects
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 24.01.2013
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|a Date Revised 29.01.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a Leaf venation patterns vary considerably between species and between leaves within a species. A mechanism based on canalization of auxin transport has been suggested as the means by which plastic yet organized venation patterns are generated. This study assessed the plasticity of Arabidopsis thaliana leaf venation in response to ectopic ground or procambial cell divisions and auxin transport inhibition (ATI). Ectopic ground cell divisions resulted in vascular fragments between major veins, whereas ectopic procambial cell divisions resulted in additional, abnormal vessels along major veins, with more severely perturbed lines forming incomplete secondary and higher-order venation. These responses imply limited vascular plasticity in response to unscheduled cell divisions. Surprisingly, a combination of ectopic ground cell divisions and ATI resulted in massive vascular overgrowth. It is hypothesized that the vascular overproduction in auxin transport-inhibited wild-type leaves is limited by simultaneous differentiation of ground cells into mesophyll cells. Ectopic ground cell divisions may negate this effect by providing undifferentiated ground cells that respond to accumulated auxin by differentiation into vascular cells
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Arabidopsis Proteins
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|a Indoleacetic Acids
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|a Transcription Factors
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|a Viral Proteins
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|a Green Fluorescent Proteins
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|a 147336-22-9
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|a Marrison, J
|e verfasserin
|4 aut
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|a Mattsson, J
|e verfasserin
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|a Haseloff, J
|e verfasserin
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|a Bougourd, S M
|e verfasserin
|4 aut
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 63(2012), 14 vom: 30. Sept., Seite 5351-64
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:63
|g year:2012
|g number:14
|g day:30
|g month:09
|g pages:5351-64
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|u http://dx.doi.org/10.1093/jxb/ers196
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