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    <title>UTas ePrints - Stomatal protection against hydraulic failure: a comparison of coexisting ferns and angiosperms</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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a comparison of coexisting ferns and angiosperms" name="eprints.title" />
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<meta content="leaf hydraulics, cavitation, stomatal closure, ferns, stomatal optimization,
vulnerability, leaf xylem." name="eprints.keywords" />
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<meta content="• Hydraulic characteristics of pteridophyte (fern and
Selaginella
) foliage were investigated
to determine whether the processes of water conduction and water loss are
coordinated in these early vascular plants similarly to angiosperms.
• Eight species of pteridophytes and associated woody angiosperms were examined
from the sun and shade in a seasonally dry tropical forest.
• Maximum leaf hydraulic conductivity (
K
leaf
) in the four pteridophytes was within
the range of the sampled shade angiosperms but much lower than that of the sundwelling
angiosperms. Hydraulic conductivity of both angiosperm and pteridophyte
leaves showed a similar response to desiccation, with
K
leaf
becoming rapidly depressed
once leaf water potential fell below a threshold. Stomatal closure in angiosperms
corresponded closely with the water potential responsible for 50% loss of
K
leaf
while
pteridophytes were found to close stomata before
K
leaf
depression.
• The contrasting behaviour of stomata in this sample of pteridophytes suggest that
this may be an intrinsic difference between pteridophytes and angiosperms, with
lower safety margins in angiosperms possibly enhancing both optimization of gas
exchange and xylem investment." name="eprints.abstract" />
<meta content="2004" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="New Phytologist" name="eprints.publication" />
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Brodribb TJ, Feild TS. 2000. Stem hydraulic supply is linked to leaf
photosynthetic capacity: evidence from New Caledonian and Tasmanian
rainforests. Plant, Cell &amp; Environment 23: 1381–1388.
Brodribb TJ, Hill RS. 1999. The importance of xylem constraints in the
distribution of conifer species. New Phytologist 143: 365–372.
Brodribb TJ, Holbrook NM. 2003. Stomatal closure during leaf
dehydration, correlation with other leaf physiological traits. Plant
Physiology 132: 2166–2173.
Brodribb TJ, Holbrook NM. 2004. Diurnal depression of leaf hydraulic
conductance in a tropical tree species. Plant, Cell &amp; Environment
(In press.)
Brodribb TJ, Holbrook NM, Edwards EJ, Gutiérrez MV. 2003.
Relations between stomatal closure, leaf turgor and xylem vulnerability
in eight tropical dry forest trees. Plant Cell &amp; Environment
26: 443–450.
Bucci SJ, Scholtz FG, Goldstein G, Meinzer FC, Sternberg L. 2003.
Dynamic changes in hydraulic conductivity in petioles of two savanna tree
species: factors and mechanisms contributing to the refilling of embolized
vessels. Plant, Cell &amp; Environment 26: 1633–1645.
Carlquist S, Schneider EL. 2001. Vessels in ferns: structural, ecological,
and evolutionary significance. American Journal of Botany
88: 1–13.
Cochard H, Coll L, Le Roux X, Ameglio T. 2002. Unraveling the effects of
plant hydraulics on stomatal closure during water stress in walnut. Plant
Physiology 128: 282–290.
Franks PJ, Farquhar GD. 1999. A relationship between humidity response,
growth form and photosynthetic operating point in C3 plants. Plant, Cell
&amp; Environment 22: 1337–1349.
Hacke U, Sperry JS, Pockman WT, Davis SD, McCulloch A. 2001.
Trends in wood density and structure are linked to the prevention of xylem
implosion by negative pressure. Oecologia 126: 457–461.
Heiser T, Giers A, Bennert HW. 1996. In situ gas exchange measurements
and the adaptation to light regime of three species of Lycopodium.
In: Camus JM, Gibby M, Johns RJ, eds. Pteridology in perspective.
Kew, UK: Royal Botanical Gardens, 599–610.
Janzen DH. 1983. Costa Rican natural history. Chicago, MI, USA: University
of Chicago Press.
Koide RT, Robichaux RH, Morse SR, Smith CM. 1991. Plant water status,
hydraulic resistance and capacitance. In: Pearcy RW, Ehleringer J, Mooney
HA, Rundel PW, eds. Plant physiological ecology. New York, NY, USA:
Chapman &amp; Hall, 161–183.
Linton MJ, Sperry JS, Williams DG. 1998. Limits to water transport in
Juniperus osteosperma and Pinus edulis ; implications for drought tolerance
and regulation of transpiration. Functional Ecology 12: 906–911.
Nardini A, Tyree MT, Salleo S. 2001. Xylem cavitation in the leaf of Prunus
laurocerasus L. and its impact on leaf hydraulics. Plant Physiology 125:
1700–1709.
Niklas KJ, Tiffney BH, Knoll AH. 1985. Patterns in vascular plant
diversification: an analysis at the species level. In: Valentine JW, ed.
Phanerozoic diversity patterns: profiles in macroevolution. Princeton, NJ,
USA: Princeton University Press.
Nobel PS. 1978. Microhabitat, water relations and photosynthesis of a desert
fern, Notholaena parryi. Oecologia 31: 293–309.
Page CN. 2002. Ecological strategies in fern evolution: a neopteridological
overview. Review of Palaeobotany and Palynology 119: 1–33.
Pickett FL. 1914. Some ecological considerations of certain fern prothallia.
American Journal of Botany 1: 477–498.
Sack L, Cowan PD, Jaikumar N, Holbrook NM. 2003. The ‘hydrology’
of leaves: co-ordination of structure and function in temperate woody
species. Plant, Cell &amp; Environment 26: 1343–1356.
Sperry JS, Ikeda T. 1997. Xylem cavitation in roots and stems of Douglas
fir and White fir. Tree Physiology 17: 275–280.
Stewart WN, Rothwell GW. 1993. Paleobotany and the evolution of plants.
Cambridge, UK: Cambridge University Press.
Tyree MT, Hammel HT. 1972. The measurement of the turgor pressure and
the water relations of plants by the pressure-bomb technique. Journal of
Experimental Botany 23: 267–282.
Veres JS. 1990. Xylem anatomy and hydraulic conductance of Costa
Rican Blechnum ferns. American Journal of Botany 77: 1610–1625.
Woodhouse R, Nobel P. 1982. Stipe anatomy, water potentials, and xylem
conductances in seven species of ferns (Filicopsida). American Journal of
Botany 69: 135–140" name="eprints.referencetext" />
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a comparison of coexisting ferns and angiosperms" name="DC.title" />
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<meta content="270402 Plant Physiology" name="DC.subject" />
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<meta content="• Hydraulic characteristics of pteridophyte (fern and
Selaginella
) foliage were investigated
to determine whether the processes of water conduction and water loss are
coordinated in these early vascular plants similarly to angiosperms.
• Eight species of pteridophytes and associated woody angiosperms were examined
from the sun and shade in a seasonally dry tropical forest.
• Maximum leaf hydraulic conductivity (
K
leaf
) in the four pteridophytes was within
the range of the sampled shade angiosperms but much lower than that of the sundwelling
angiosperms. Hydraulic conductivity of both angiosperm and pteridophyte
leaves showed a similar response to desiccation, with
K
leaf
becoming rapidly depressed
once leaf water potential fell below a threshold. Stomatal closure in angiosperms
corresponded closely with the water potential responsible for 50% loss of
K
leaf
while
pteridophytes were found to close stomata before
K
leaf
depression.
• The contrasting behaviour of stomata in this sample of pteridophytes suggest that
this may be an intrinsic difference between pteridophytes and angiosperms, with
lower safety margins in angiosperms possibly enhancing both optimization of gas
exchange and xylem investment." name="DC.description" />
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    <h1 class="ep_tm_pagetitle">Stomatal protection against hydraulic failure: a comparison of coexisting ferns and angiosperms</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> (2004) <xhtml:em>Stomatal protection against hydraulic failure: a comparison of coexisting ferns and angiosperms.</xhtml:em> New Phytologist, 162 (3). pp. 663-670. 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/2595/1/Brodribb_Holbrook_fern.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/2595/1/Brodribb_Holbrook_fern.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />325Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="3401" 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/10.1111/j.1469-8137.2004.01060.x">http://dx.doi.org/10.1111/j.1469-8137.2004.01060.x</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">• Hydraulic characteristics of pteridophyte (fern and&#13;
Selaginella&#13;
) foliage were investigated&#13;
to determine whether the processes of water conduction and water loss are&#13;
coordinated in these early vascular plants similarly to angiosperms.&#13;
• Eight species of pteridophytes and associated woody angiosperms were examined&#13;
from the sun and shade in a seasonally dry tropical forest.&#13;
• Maximum leaf hydraulic conductivity (&#13;
K&#13;
leaf&#13;
) in the four pteridophytes was within&#13;
the range of the sampled shade angiosperms but much lower than that of the sundwelling&#13;
angiosperms. Hydraulic conductivity of both angiosperm and pteridophyte&#13;
leaves showed a similar response to desiccation, with&#13;
K&#13;
leaf&#13;
becoming rapidly depressed&#13;
once leaf water potential fell below a threshold. Stomatal closure in angiosperms&#13;
corresponded closely with the water potential responsible for 50% loss of&#13;
K&#13;
leaf&#13;
while&#13;
pteridophytes were found to close stomata before&#13;
K&#13;
leaf&#13;
depression.&#13;
• The contrasting behaviour of stomata in this sample of pteridophytes suggest that&#13;
this may be an intrinsic difference between pteridophytes and angiosperms, with&#13;
lower safety margins in angiosperms possibly enhancing both optimization of gas&#13;
exchange and xylem investment.</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"&#13;
</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">leaf hydraulics, cavitation, stomatal closure, ferns, stomatal optimization,&#13;
vulnerability, leaf xylem.</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 &gt; 270400 Botany &gt; 270402 Plant Physiology</a><br /><a href="http://eprints.utas.edu.au/view/subjects/270400.html">270000 Biological Sciences &gt; 270400 Botany</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2595</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 09:13</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</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=2595;">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&amp;eprintid=2595">item control page</a></p>
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