| Changes in stomatal conductance along grass blades reflects changes in leaf structure. | |
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MedLine Citation:
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PMID: 22146058 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Identifying the consequences of grass blade morphology (long, narrow leaves) on the heterogeneity of gas exchange is fundamental to an understanding of the physiology of this growth form. We examined acropetal changes in anatomy, hydraulic conductivity, and rates of gas exchange in 5 grass species (including C(3) and C(4) functional types). Both stomatal conductance and photosynthesis increased along all grass blades despite constant light availability. Hydraulic efficiency within the xylem remained constant along the leaf, but structural changes outside the xylem changed in concert with stomatal conductance. Stomatal density and stomatal pore index remained constant along grass blades but interveinal distance decreased acropetally resulting in a decreased path length for water movement from vascular bundle to stomate. The increase in stomatal conductance was correlated with the decreased pathlength through the leaf mesophyll. A strong correlation between the distance from vascular bundles to stomatal pores and stomatal conductance has been identified across species; our results suggest this relationship also exists within individual leaves. © 2011 Blackwell Publishing Ltd. |
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Authors:
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T W Ocheltree; J B Nippert; P V V Prasad |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-7 |
Journal Detail:
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Title: Plant, cell & environment Volume: - ISSN: 1365-3040 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9309004 Medline TA: Plant Cell Environ Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2011 Blackwell Publishing Ltd. |
Affiliation:
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Department of Agronomy, Kansas State University, 2004 Throckmorton Hall, Manhattan, KS 66506, USA Division of Biology, Kansas State University 116 Ackert Hall, Manhattan, KS 66506, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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