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<meta content="Brodribb, Tim J." name="eprints.creators_name" />
<meta content="Hill, Robert S." name="eprints.creators_name" />
<meta content="Timothy.Brodribb@utas.edu.au" name="eprints.creators_id" />
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<meta content="xylem cavitation, air-seeding, drought stress, conifer distribution, xylem conductance." name="eprints.keywords" />
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<meta content="Vulnerability of stem xylem to cavitation was measured in 10 species of conifers using high pressure air to induce xylem embolism. Mean values of air pressure required to induce a 50% loss in hydraulic conductivity (50) varied enormously between species, ranging from a maximum of 14.2±0.6 MPa (corresponding to a xylem water potential of −14.2 MPa) in the semi-arid species Actinostrobus acuminatus to a minimum of 2.3±0.2 MPa in the rainforest species Dacrycarpus dacrydioides. Mean 50 was significantly correlated with the mean rainfall of the driest quarter within the distribution of each species. The value of 50 was also compared with leaf drought tolerance data for these species in order to determine whether xylem dysfunction during drought dictated drought response at the leaf level. Previous data describing the maximum depletion of internal CO2 concentration (ci) in the leaves of these species during artificial drought was strongly correlated with 50 suggesting a primary role of xylem in effecting leaf drought response. The possibility of a trade-off between xylem conductivity and xylem vulnerability was tested in a sub-sample of four species, but no evidence of an inverse relationship between 50 and either stem-area specific (Ka) or leaf-area specific conductivity (K1) was found. " name="eprints.abstract" />
<meta content="1999" name="eprints.date" />
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ANNA L. JACOBSEN, R. BRANDON PRATT, STEPHEN D. DAVIS & FRANK W. EWERS. (2007) Cavitation resistance and seasonal hydraulics differ among three arid Californian plant communities. Plant, Cell & Environment 30:12, 1599–1609
JARMILA PITTERMANN, JOHN S. SPERRY, JAMES K. WHEELER, UWE G. HACKE & ELZARD H. SIKKEMA. (2006) Mechanical reinforcement of tracheids compromises the hydraulic efficiency of conifer xylem. Plant, Cell & Environment 29:8, 1618–1628
Cynthia J. Willson and Robert B. Jackson. (2006) Xylem cavitation caused by drought and freezing stress in four co-occurring Juniperus species. Physiologia Plantarum 127:3, 374–382
ERIKA J. EDWARDS & MIRIAM DIAZ. (2006) Ecological physiology of Pereskia guamacho, a cactus with leaves. Plant, Cell & Environment 29:2, 247–256
Stefan Mayr, Uwe Hacke, Peter Schmid, Franziska Schwienbacher, Andreas Gruber. (2006) FROST DROUGHT IN CONIFERS AT THE ALPINE TIMBERLINE: XYLEM DYSFUNCTION AND ADAPTATIONS. Ecology 87:12, 3175
CrossRef
Sonya M. Dunham, Barbara Lachenbruch, Lisa M. Ganio. (2006) Bayesian analysis of Douglas-fir hydraulic architecture at multiple scales. Trees 21:1, 65
CrossRef
Nathalie Bréda, Roland Huc, André Granier, Erwin Dreyer. (2006) Temperate forest trees and stands under severe drought: a review of ecophysiological responses, adaptation processes and long-term consequences. Annals of Forest Science 63:6, 625
CrossRef
T. J. Brodribb, N. M. Holbrook, R. S. Hill. (2005) Seedling growth in conifers and angiosperms: impacts of contrasting xylem structure. Australian Journal of Botany 53:8, 749
CrossRef
Arne Sellin, Priit Kupper. (2005) Effects of light availability versus hydraulic constraints on stomatal responses within a crown of silver birch. Oecologia 142:3, 388
CrossRef
T. J. BRODRIBB & N. M. HOLBROOK. (2004) Diurnal depression of leaf hydraulic conductance in a tropical tree species. Plant, Cell & Environment 27:7, 820–827
Tim J. Brodribb and N. Michele Holbrook. (2004) Stomatal protection against hydraulic failure: a comparison of coexisting ferns and angiosperms. New Phytologist 162:3, 663–670
Hafiz Maherali, William T. Pockman, Robert B. Jackson. (2004) ADAPTIVE VARIATION IN THE VULNERABILITY OF WOODY PLANTS TO XYLEM CAVITATION. Ecology 85:8, 2184
CrossRef
S. MAYR & H. COCHARD. (2003) A new method for vulnerability analysis of small xylem areas reveals that compression wood of Norway spruce has lower hydraulic safety than opposite wood. Plant, Cell & Environment 26:8, 1365–1371
T. J. BRODRIBB, N. M. HOLBROOK, E. J. EDWARDS & M. V. GUTIÉRREZ. (2003) Relations between stomatal closure, leaf turgor and xylem vulnerability in eight tropical dry forest trees. Plant, Cell & Environment 26:3, 443–450
Stefan Mayr, Marion Wolfschwenger and Helmut Bauer. (2002) Winter-drought induced embolism in Norway spruce (Picea abies) at the Alpine timberline. Physiologia Plantarum 115:1, 74–80
J. S. Sperry U. G. Hacke R. Oren & J. P. Comstock. (2002) Water deficits and hydraulic limits to leaf water supply. Plant, Cell & Environment 25:2, 251–263
T. J. Brodribb & T. S. Feild. (2000) Stem hydraulic supply is linked to leaf photosynthetic capacity: evidence from New Caledonian and Tasmanian rainforests. Plant, Cell & Environment 23:12, 1381–1388
T. S. Feild & N. M. Holbrook. (2000) Xylem sap flow and stem hydraulics of the vesselless angiosperm Drimys granadensis (Winteraceae) in a Costa Rican elfin forest. Plant, Cell & Environment 23:10, 1067–1077
P. Becker. (2000) Competition in the regeneration niche between conifers and angiosperms: Bond's slow seedling hypothesis. Functional Ecology 14:4, 401–412
" name="eprints.referencetext" />
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<meta content="Vulnerability of stem xylem to cavitation was measured in 10 species of conifers using high pressure air to induce xylem embolism. Mean values of air pressure required to induce a 50% loss in hydraulic conductivity (50) varied enormously between species, ranging from a maximum of 14.2±0.6 MPa (corresponding to a xylem water potential of −14.2 MPa) in the semi-arid species Actinostrobus acuminatus to a minimum of 2.3±0.2 MPa in the rainforest species Dacrycarpus dacrydioides. Mean 50 was significantly correlated with the mean rainfall of the driest quarter within the distribution of each species. The value of 50 was also compared with leaf drought tolerance data for these species in order to determine whether xylem dysfunction during drought dictated drought response at the leaf level. Previous data describing the maximum depletion of internal CO2 concentration (ci) in the leaves of these species during artificial drought was strongly correlated with 50 suggesting a primary role of xylem in effecting leaf drought response. The possibility of a trade-off between xylem conductivity and xylem vulnerability was tested in a sub-sample of four species, but no evidence of an inverse relationship between 50 and either stem-area specific (Ka) or leaf-area specific conductivity (K1) was found. " name="DC.description" />
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<h1 class="ep_tm_pagetitle">The importance of xylem constraints in the distribution of conifer species</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Brodribb, Tim J.</span> and <span class="person_name">Hill, Robert S.</span> (1999) <xhtml:em>The importance of xylem constraints in the distribution of conifer species.</xhtml:em> New Phytologist, 143 (2). pp. 365-375. 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/2642/1/xylem__and__conifer__dist.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/2642/1/xylem__and__conifer__dist.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />145Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="3464" 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.1469-8137.1999.00446.x">http://dx.doi.org/10.1046/j.1469-8137.1999.00446.x</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Vulnerability of stem xylem to cavitation was measured in 10 species of conifers using high pressure air to induce xylem embolism. Mean values of air pressure required to induce a 50% loss in hydraulic conductivity (50) varied enormously between species, ranging from a maximum of 14.2±0.6 MPa (corresponding to a xylem water potential of −14.2 MPa) in the semi-arid species Actinostrobus acuminatus to a minimum of 2.3±0.2 MPa in the rainforest species Dacrycarpus dacrydioides. Mean 50 was significantly correlated with the mean rainfall of the driest quarter within the distribution of each species. The value of 50 was also compared with leaf drought tolerance data for these species in order to determine whether xylem dysfunction during drought dictated drought response at the leaf level. Previous data describing the maximum depletion of internal CO2 concentration (ci) in the leaves of these species during artificial drought was strongly correlated with 50 suggesting a primary role of xylem in effecting leaf drought response. The possibility of a trade-off between xylem conductivity and xylem vulnerability was tested in a sub-sample of four species, but no evidence of an inverse relationship between 50 and either stem-area specific (Ka) or leaf-area specific conductivity (K1) was found. </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">Keywords:</th><td valign="top" class="ep_row">xylem cavitation, air-seeding, drought stress, conifer distribution, xylem conductance.</td></tr><tr><th valign="top" class="ep_row">Subjects:</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">2642</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">10 Dec 2007 12:20</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=2642;">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=2642">item control page</a></p>
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