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<title>UTas ePrints - Leaf Maximum Photosynthetic Rate and Venation Are Linked by Hydraulics</title>
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<meta content="Brodribb, Tim J." name="eprints.creators_name" />
<meta content="Feild, Taylor S." name="eprints.creators_name" />
<meta content="Jordan, Gregory J." name="eprints.creators_name" />
<meta content="timothyb@utas.edu.au" name="eprints.creators_id" />
<meta content="tfeild@utk.edu" name="eprints.creators_id" />
<meta content="greg.jordan@utas.edu.au" name="eprints.creators_id" />
<meta content="article" name="eprints.type" />
<meta content="2007-08-30" name="eprints.datestamp" />
<meta content="2008-02-11T00:09:53Z" name="eprints.lastmod" />
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<meta content="Leaf Maximum Photosynthetic Rate and Venation
Are Linked by Hydraulics" name="eprints.title" />
<meta content="pub" name="eprints.ispublished" />
<meta content="270402" name="eprints.subjects" />
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<meta content="vein density, xylem, tracheids, water relations" name="eprints.keywords" />
<meta content="Leaf veins are almost ubiquitous across the range of terrestrial plant diversity, yet their influence on leaf photosynthetic
performance remains uncertain. We show here that specific physical attributes of the vascular plumbing network are key
limiters of the hydraulic and photosynthetic proficiency of any leaf. Following the logic that leaf veins evolved to bypass inefficient water transport through living mesophyll tissue, we examined the hydraulic pathway beyond the distal ends of the vein system as a possible limiter of water transport in leaves. We tested a mechanistic hypothesis that the length of this final traverse, as water moves from veins across the mesophyll to where it evaporates from the leaf, governs the hydraulic efficiency and photosynthetic carbon assimilation of any leaf. Sampling 43 species across the breadth of plant diversity from mosses to flowering plants, we found that the post-vein traverse as determined by characters such as vein density, leaf thickness, and cell
shape, was strongly correlated with the hydraulic conductivity and maximum photosynthetic rate of foliage. The shape of this correlation provided clear support for the a priori hypothesis that vein positioning limits photosynthesis via its influence on
leaf hydraulic efficiency." name="eprints.abstract" />
<meta content="2007-08" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Plant Physiology" name="eprints.publication" />
<meta content="144" name="eprints.volume" />
<meta content="1890-1898" name="eprints.pagerange" />
<meta content="10.1104/pp.107.101352" name="eprints.id_number" />
<meta content="UNSPECIFIED" name="eprints.thesis_type" />
<meta content="TRUE" name="eprints.refereed" />
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<meta content="Aasamaa K, Sober A, Rahi M (2001) Leaf anatomical characteristics
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patterning by polar auxin transport. Genes Dev 20: 1015–1027
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winding road. Curr Opin Plant Biol 9: 48–54
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Leaf form and photosynthesis. Bioscience 47: 785–793
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Plant Sci 164: S115–S127
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equable continental interiors in the eocene. Philos Trans R Soc Lond B
Biol Sci 341: 243–252
Zwieniecki MA, Brodribb TJ, Holbrook NM (2007) Hydraulic design
of leaves: insights from rehydration kinetics. Plant Cell Environ
(in press)" name="eprints.referencetext" />
<meta content="Brodribb, Tim J. and Feild, Taylor S. and Jordan, Gregory J. (2007) Leaf Maximum Photosynthetic Rate and Venation Are Linked by Hydraulics. Plant Physiology, 144 . pp. 1890-1898." name="eprints.citation" />
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Are Linked by Hydraulics" name="DC.title" />
<meta content="Brodribb, Tim J." name="DC.creator" />
<meta content="Feild, Taylor S." name="DC.creator" />
<meta content="Jordan, Gregory J." name="DC.creator" />
<meta content="270402 Plant Physiology" name="DC.subject" />
<meta content="270401 Plant Systematics, Taxonomy and Phylogeny" name="DC.subject" />
<meta content="Leaf veins are almost ubiquitous across the range of terrestrial plant diversity, yet their influence on leaf photosynthetic
performance remains uncertain. We show here that specific physical attributes of the vascular plumbing network are key
limiters of the hydraulic and photosynthetic proficiency of any leaf. Following the logic that leaf veins evolved to bypass inefficient water transport through living mesophyll tissue, we examined the hydraulic pathway beyond the distal ends of the vein system as a possible limiter of water transport in leaves. We tested a mechanistic hypothesis that the length of this final traverse, as water moves from veins across the mesophyll to where it evaporates from the leaf, governs the hydraulic efficiency and photosynthetic carbon assimilation of any leaf. Sampling 43 species across the breadth of plant diversity from mosses to flowering plants, we found that the post-vein traverse as determined by characters such as vein density, leaf thickness, and cell
shape, was strongly correlated with the hydraulic conductivity and maximum photosynthetic rate of foliage. The shape of this correlation provided clear support for the a priori hypothesis that vein positioning limits photosynthesis via its influence on
leaf hydraulic efficiency." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Leaf Maximum Photosynthetic Rate and Venation Are Linked by Hydraulics</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Brodribb, Tim J.</span> and <span class="person_name">Feild, Taylor S.</span> and <span class="person_name">Jordan, Gregory J.</span> (2007) <xhtml:em>Leaf Maximum Photosynthetic Rate and Venation Are Linked by Hydraulics.</xhtml:em> Plant Physiology, 144 . pp. 1890-1898.</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/1711/2/1890.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1711/2/1890.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />682Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="2210" name="docid" accept-charset="utf-8" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://www.plantphysiol.org/cgi/doi/10.1104/pp.107.101352">http://www.plantphysiol.org/cgi/doi/10.1104/pp.107.101352</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Leaf veins are almost ubiquitous across the range of terrestrial plant diversity, yet their influence on leaf photosynthetic
performance remains uncertain. We show here that specific physical attributes of the vascular plumbing network are key
limiters of the hydraulic and photosynthetic proficiency of any leaf. Following the logic that leaf veins evolved to bypass inefficient water transport through living mesophyll tissue, we examined the hydraulic pathway beyond the distal ends of the vein system as a possible limiter of water transport in leaves. We tested a mechanistic hypothesis that the length of this final traverse, as water moves from veins across the mesophyll to where it evaporates from the leaf, governs the hydraulic efficiency and photosynthetic carbon assimilation of any leaf. Sampling 43 species across the breadth of plant diversity from mosses to flowering plants, we found that the post-vein traverse as determined by characters such as vein density, leaf thickness, and cell
shape, was strongly correlated with the hydraulic conductivity and maximum photosynthetic rate of foliage. The shape of this correlation provided clear support for the a priori hypothesis that vein positioning limits photosynthesis via its influence on
leaf hydraulic efficiency.</p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">vein density, xylem, tracheids, water relations</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/270402.html">270000 Biological Sciences > 270400 Botany > 270402 Plant Physiology</a><br /><a href="http://eprints.utas.edu.au/view/subjects/270401.html">270000 Biological Sciences > 270400 Botany > 270401 Plant Systematics, Taxonomy and Phylogeny</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">1711</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">dr gregory j jordan</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">30 Aug 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">11 Feb 2008 11:09</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=1711;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=1711">item control page</a></p>
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