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<title>UTas ePrints - Changes in leaf hydraulic conductance during leaf shedding in seasonally dry tropical forest</title>
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<meta content="Brodribb, Tim J." name="eprints.creators_name" />
<meta content="Holbrook, N. M" name="eprints.creators_name" />
<meta content="Timothy.Brodribb@utas.edu.au" name="eprints.creators_id" />
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<meta content="article" name="eprints.type" />
<meta content="2007-11-30 03:29:32" name="eprints.datestamp" />
<meta content="2008-02-11T00:18:19Z" name="eprints.lastmod" />
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<meta content="Changes in leaf hydraulic conductance during leaf
shedding in seasonally dry tropical forest" name="eprints.title" />
<meta content="pub" name="eprints.ispublished" />
<meta content="270402" name="eprints.subjects" />
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<meta content="• The hydraulic conductance of leaves (
k
leaf
) was examined to determine whether
this little understood component of the water transport pathway plays a role
in governing leaf phenology of two deciduous dry forest trees (
Calycophyllum
candidissimum
and
Rhedera trinervis
).
•
k
leaf
was monitored in parallel with stem hydraulic conductivity (K
stem
) during the
transition from wet to dry season. The relationships between declining photosynthetic
quantum yield during senescence and declining
k
leaf
and K
stem
were compared.
• Divergent patterns were observed in the response of K
stem
to seasonal drying;
however, the behaviour of
k
leaf
was essentially similar in both species. Large (five- to
ten-fold) decreases in leaf hydraulic conductance occurred before, and during the
later stages of leaf senescence. During senescence, declining
k
leaf
, which continued
until leaves were ultimately shed, was associated with a concomitant decline in
quantum yield.
• We conclude that, in these species, the loss of hydraulic conductance of the leaf
vascular system is linked to, and possibly responsible for, the loss of photosynthetic
capacity during leaf senescence." name="eprints.abstract" />
<meta content="2003" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="New Phytologist" name="eprints.publication" />
<meta content="158" name="eprints.volume" />
<meta content="295-303" name="eprints.pagerange" />
<meta content="10.1046/j.1469-8137.2003.00736.x" name="eprints.id_number" />
<meta content="TRUE" name="eprints.refereed" />
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<meta content="Becker P, Tyree MT, Tsuda M. 1999. Hydraulic conductances of
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photosynthetic co-ordination in seasonally dry tropical forest trees. Plant,
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of the fast and slow reversible components of non-photochemical
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on stomatal response to humidity, hydraulic conductance, and soil
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cavitation of leaf minor veins: any impact on leaf gas exchange? Plant, Cell
& Environment 24: 851–859.
Salleo S, Nardini A, Lo Gullo MA, Ghirardelli LA. 2002. Changes in stem
and leaf hydraulics preceding leaf shedding in Castanea sativa L. Biologia
Plantarum 45: 227–234.
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leaf water potential components of evergreen and deciduous species
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life-span in a tropical dry forest. Oecologia 96: 19–23.
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and Forest Meteorology 104: 13–23.
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conductance on stomatal conductance and xylem cavitation. Journal of
Experimental Botany 44: 1075–1082.
Tyree MT. 1997. The cohesion–tension theory of sap ascent: current
controversies. Journal of Experimnetal Botany 48: 1753–1765.
Zwieniecki MA, Melcher PJ, Holbrook NM. 2001. Hydrogel control of
xylem hydraulic resistance in plants. Science 291: 1059–1062." name="eprints.referencetext" />
<meta content="Brodribb, Tim J. and Holbrook, N. M (2003) Changes in leaf hydraulic conductance during leaf shedding in seasonally dry tropical forest. New Phytologist, 158 . pp. 295-303. ISSN 0028-646X" name="eprints.citation" />
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shedding in seasonally dry tropical forest" name="DC.title" />
<meta content="Brodribb, Tim J." name="DC.creator" />
<meta content="Holbrook, N. M" name="DC.creator" />
<meta content="270402 Plant Physiology" name="DC.subject" />
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<meta content="• The hydraulic conductance of leaves (
k
leaf
) was examined to determine whether
this little understood component of the water transport pathway plays a role
in governing leaf phenology of two deciduous dry forest trees (
Calycophyllum
candidissimum
and
Rhedera trinervis
).
•
k
leaf
was monitored in parallel with stem hydraulic conductivity (K
stem
) during the
transition from wet to dry season. The relationships between declining photosynthetic
quantum yield during senescence and declining
k
leaf
and K
stem
were compared.
• Divergent patterns were observed in the response of K
stem
to seasonal drying;
however, the behaviour of
k
leaf
was essentially similar in both species. Large (five- to
ten-fold) decreases in leaf hydraulic conductance occurred before, and during the
later stages of leaf senescence. During senescence, declining
k
leaf
, which continued
until leaves were ultimately shed, was associated with a concomitant decline in
quantum yield.
• We conclude that, in these species, the loss of hydraulic conductance of the leaf
vascular system is linked to, and possibly responsible for, the loss of photosynthetic
capacity during leaf senescence." name="DC.description" />
<meta content="2003" name="DC.date" />
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<h1 class="ep_tm_pagetitle">Changes in leaf hydraulic conductance during leaf shedding in seasonally dry tropical forest</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Brodribb, Tim J.</span> and <span class="person_name">Holbrook, N. M</span> (2003) <xhtml:em>Changes in leaf hydraulic conductance during leaf shedding in seasonally dry tropical forest.</xhtml:em> New Phytologist, 158 . pp. 295-303. ISSN 0028-646X</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/2598/1/new_phyt_2003.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/2598/1/new_phyt_2003.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />345Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="3406" name="docid" 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://dx.doi.org/10.1046/j.1469-8137.2003.00736.x">http://dx.doi.org/10.1046/j.1469-8137.2003.00736.x</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">• The hydraulic conductance of leaves (
k
leaf
) was examined to determine whether
this little understood component of the water transport pathway plays a role
in governing leaf phenology of two deciduous dry forest trees (
Calycophyllum
candidissimum
and
Rhedera trinervis
).
•
k
leaf
was monitored in parallel with stem hydraulic conductivity (K
stem
) during the
transition from wet to dry season. The relationships between declining photosynthetic
quantum yield during senescence and declining
k
leaf
and K
stem
were compared.
• Divergent patterns were observed in the response of K
stem
to seasonal drying;
however, the behaviour of
k
leaf
was essentially similar in both species. Large (five- to
ten-fold) decreases in leaf hydraulic conductance occurred before, and during the
later stages of leaf senescence. During senescence, declining
k
leaf
, which continued
until leaves were ultimately shed, was associated with a concomitant decline in
quantum yield.
• We conclude that, in these species, the loss of hydraulic conductance of the leaf
vascular system is linked to, and possibly responsible for, the loss of photosynthetic
capacity during leaf senescence.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><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">Additional Information:</th><td valign="top" class="ep_row">The definitive version is available at www.blackwell-synergy.com
</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/270400.html">270000 Biological Sciences > 270400 Botany</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">2598</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">Scholarly Publications Librarian</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">30 Nov 2007 14:29</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">11 Feb 2008 11:18</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=2598;">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=2598">item control page</a></p>
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