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<title>UTas ePrints - Structure and Function of Tracheary Elements in Amborella Trichopoda</title>
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<meta content="Feild, Taylor S." name="eprints.creators_name" />
<meta content="Zweiniecki, Maciej A." name="eprints.creators_name" />
<meta content="Brodribb, Tim J." name="eprints.creators_name" />
<meta content="Jaffre, Tanguy" name="eprints.creators_name" />
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<meta content="Timothy.Brodribb@utas.edu.au" name="eprints.creators_id" />
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<meta content="article" name="eprints.type" />
<meta content="2007-12-03 04:11:49" name="eprints.datestamp" />
<meta content="2008-01-08 15:30:00" name="eprints.lastmod" />
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<meta content="Structure and Function of Tracheary Elements in Amborella Trichopoda" name="eprints.title" />
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<meta content="270402" name="eprints.subjects" />
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<meta content="Amborella, basal angiosperms, xylem hydraulic conductivity, vessel evolution." name="eprints.keywords" />
<meta content="Recent phylogenetic analyses have placed the root of flowering plants near Amborella trichopoda, a woody
plant restricted to cloud forest habitats in New Caledonia. A distinctive feature of A. trichopoda is its reported
lack of xylem vessels. Here we present observations of pit membrane structure and end wall morphology for
primary and secondary tracheary cells of A. trichopoda as well as field measurements of stem hydraulic
properties of A. trichopoda compared with five cloud forest species from New Caledonia. Observations of
stem radial sections revealed that the primary wall material in the protoxylem and metaxylem elements was
intact. No large porosities (such as those that have been observed in the pit membranes of Nymphaeales) were
observed. However, a few elliptical pits of tracheary cells in the secondary xylem appeared to lack pit membranes.
These observations are consistent with our measurements of functional conduit length, which indicate
that the longest open conduits are equal to the length of two secondary xylem elements joined end to end.
Thus, the xylem of A. trichopoda appears to be functionally vesselless, with the caveat that connections between
individual vascular elements may occasionally be open (i.e., lacking in at least one pit membrane). Sapwood
area and leaf area–specific hydraulic conductivities of A. trichopoda are similar to those of conifers and
angiosperms, with and without xylem vessels, growing in understory cloud forest environments. These findings
bear on discussions of the morphology and ecology of the first flowering plants as well as on the possible
causes of their diversification." name="eprints.abstract" />
<meta content="2000" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content=" International Journal of Plant Sciences" name="eprints.publication" />
<meta content="161" name="eprints.volume" />
<meta content="5" name="eprints.number" />
<meta content="705-712" name="eprints.pagerange" />
<meta content="10.1086/314293" name="eprints.id_number" />
<meta content="TRUE" name="eprints.refereed" />
<meta content="1058-5893" name="eprints.issn" />
<meta content="http://dx.doi.org/10.1086/314293" name="eprints.official_url" />
<meta content="Baas P, EA Wheeler 1996 Parallelism and reversibility in xylem evolution—
a review. IAWA Bull 17:351–364.
Bailey IW 1957 Additional notes on the vesselless dicotyledon, Amborella
trichopoda. J Arnold Arbor Harv Univ 35:374–378.
Bailey IW, BGL Swamy 1948 Amborella trichopoda Baill., a new
morphological type of vesselless dicotyledon. J Arnold Arbor Harv
Univ 29:245–254.
1949 The morphology and relationships of Austrobaileya. J
Arnold Arbor Harv Univ 30:11–26.
Bailey IW, WW Tupper 1918 Size variation in tracheary cells. I. A
comparison between the secondary xylems of vascular cryptogams,
gymnosperms and angiosperms. Proc Am Acad Arts 54:149–204.
Becker PM, MT Tyree, M Tsuda 1999 Hydraulic conductances of
angiosperms versus conifers: similar transport sufficiency at the
whole plant level. Tree Physiol 19:445–452.
Bond WJ 1989 The tortoise and the hare: ecology of angiosperm
dominance and gymnosperm persistence. Biol J Linn Soc 36:
227–249.
Brodribb T, RS Hill 1999 The importance of xylem constraints in the
distribution of conifer species. New Phytol 143:365–372.
Brothers RN, AR Lillie 1988 Regional geology of New Caledonia.
Pages 325–374 in AEM Nairin, GF Stehli, S Uyeda, eds. The ocean
basin and margins. Vol 7B. Plenum, New York.
Carlquist S 1975 Ecological strategies of xylem evolution. University
of California Press, Berkeley. 259 pp.
1983 Wood anatomy of Bubbia (Winteraceae); with comments
on origin of vessels in dicotyledons. Am J Bot 70:578–590.
1984 Wood anatomy of Trimeniaceae. Plant Syst Evol 144:
103–118.
1987 Presence of vessels in wood of Sarcandra (Chloranthaceae);
comments on the vessel origin in angiosperms. Am J Bot 74:
1765–1771.
1990 Wood anatomy of Ascarina (Chloranthaceae) and the
tracheid-vessel element transition. Aliso 12:667–684.
1992 Pit membrane remnants in perforation plates of primitive
dicotyledons and their significance. Am J Bot 79:660–672.
Carlquist S, EL Schneider 1997 Origins and nature of vessels in monocotyledons.
I. Acorus. Int J Plant Sci 158:51–56.
Chiu ST, FW Ewers 1993 The effect of segment length on conductance
measurements in Lonicera fragrantissima. J Exp Bot 44:
175–181.
Crane PR, EM Friis, KR Pedersen 1995 The origin and early diversification
of angiosperms. Nature 374:27–34.
Crane PR, S Lidgard 1989 Angiosperm diversification and paleolatitudinal
gradients in Cretaceous floristic diversity. Science 246:
675–678.
Cronquist A 1988 The evolution and classification of flowering
plants. New York Botanical Garden, Bronx. 555 pp.
Donoghue MJ 1989 Phylogenies and the analysis of evolutionary sequences,
with examples from seed plants. Evolution 43:1137–1156.
Donoghue MJ, JA Doyle 1989 Phylogenetic analysis of angiosperms
and the relationships of Hamamelidae. Pages 17–45 in PR Crane,
S Blackmore, eds. Evolution, systematics, and fossil history of the
Hammamelidae. Vol 1. Clarendon, Oxford.
Doyle JA 1978 Origin of angiosperms. Annu Rev Ecol Syst 9:
365–392.
1998 Phylogeny of vascular plants. Annu Rev Ecol Syst 29:
567–599.
Doyle JA, MJ Donoghue 1986 Seed plant phylogeny and the origin
of angiosperms: an experimental cladistic approach. Bot Rev 52:
321–431.
1993 Phylogenies and angiosperm diversification. Paleobiology
19:141–167.
Endress PK 1983 Dispersal and distribution in some small archaic
relict angiosperm families (Austrobaileyaceae, Eupomatiaceae, Himantandraceae,
Idiospermoideae-Calycanthaceae). Sonderbd Natwiss
Ver Hambg 7:201–217.
Enright NJ, DGoldblum 1998 Stand structure of the emergent conifer
Agathis ovata in forest and maquis, Province Sud, New Caledonia.
J Biogeogr 25:641–648.
Ewers FW, JB Fisher, K Fichtner 1991 Water flux and xylem structure
in vines. Pages 127–160 in FE Putz, HA Mooney, eds. The biology
of vines. Cambridge University Press, Cambridge.
Feild TS, NM Holbrook In press Xylem sapflow and stem hydraulics
of the vesselless angiosperm Drimys granadensis (Winteraceae) in a
Costa Rican elfin forest. Plant Cell Environ.
Feild TS, MA Zwieniecki, MJ Donoghue, NM Holbrook 1998
Stomatal plugs of Drimys winteri (Winteraceae) protect leaves from
mist but not drought. Proc Natl Acad Sci USA 95:14256–14259.
Frost FH 1930 Specialization in secondary xylem of angiosperms. I.
Origin of vessel. Bot Gaz 89:67–92.
Gartner BL 1991 Stem hydraulic properties of vines vs. shrubs of
western poison oak, Toxicodendron diversilobum. Oecologia 87:
180–189.
Herendeen PS, EA Wheeler, P Baas 1999 Angiosperm wood evolution
and the potential contribution of paleontological data. Bot Rev 65:
279–300.
Hickey LJ, JA Doyle 1977 Early Cretaceous fossil evidence for angiosperm
evolution. Bot Rev 43:3–104.
Jaffre´ T 1980 Etude ecologique du peuplement vegetal des sols derives
de roches ultrabasiques en Nouvell Caledonie. Travaux de Documents
124. ORSTOM, Paris. 273 pp.
1995 Distribution and ecology of the conifers of New Caledonia.
Pages 171–196 in NJ Enright, RS Hill, eds. Ecology of the
southern conifers. Smithsonian Institution Press, Washington, D.C.
Je´re´mie J 1980 Amborellaceae. Flore Nouvelle Caledonie Dependances
10:157–160.
Mathews S, MJ Donoghue 1999 The root of angiosperm phylogeny
inferred from duplicate phytochrome genes. Science 286:947–950.
Metcalfe CR 1987 Anatomy of the dicotyledons. Vol 3. Magnoliales,
Illiciales and Laurales. 2d ed. Clarendon, Oxford.
METEO-France 1994 Climat de Nouvelle Caledonie. METEO-France
en Nouvelle Caledonie, Noumea´ .
O’Brien TP, ME McCully 1981 The study of plant structure: principles
and selected methods. Termarcarphi, Melbourne. 357 pp.
Parkinson CL, KL Adams, JD Palmer 1999 Multigene analyses identify
the three lineages of extant flowering plants. Curr Biol 9:
1485–1488.
Pole M 1994 The New Zealand flora—entirely long-distance dispersal?
J Biogeogr 21:625–635.
Qiu Y-L, J Lee, F Bernasconi-Quadroni, DE Soltis, PS Soltis,MZanis,
EA Zimmer, Z Chen, M Savolainen, MW Chase 1999 The earliest
angiosperms: evidence from mitochondrial, plastid, and nuclear genomes.
Nature 402:404–407.
Sanderson MJ, MJ Donoghue 1994 Shifts in diversification rate with
the origin of angiosperms. Science 264:1590–1593.
Schneider EL, S Carlquist 1995a Vessels in the roots of Barclaya roundifolia
(Nymphaeaceae). Am J Bot 82:1343–1349.
1995b Vessel origins in Nymphaeaceae: Euryale and Victoria.
Bot J Linn Soc 119:195–193.
Smith AC 1947 The families Illiciaceae and Schisandraceae. Sargentia
7:1–224.
Soltis PS, DE Solits,MWChase 1999 Angiosperm phylogeny inferred
from multiple genes as a tool for comparative biology. Nature 402:
402–404.
Sperry JS, JR Donnelly, MT Tyree 1988 A method for measuring
hydraulic conductivity and embolism in xylem. Plant Cell Environ
11:35–40.
Stebbins GL 1974 Flowering plants: evolution above the species level.
Harvard University Press, Cambridge, Mass. 399 pp.
Takahashi A 1988 Morphology and ontogeny of stem xylem elements
in Sarcandra glabra (Thunb.) Nakai (Chloranthaceae): additional
evidence for the occurrence of vessels. Bot Mag 101:387–395.
Takhtajan AL 1969 Flowering plants: origin and dispersal. Smithsonian
Institution Press, Washington, D.C. 310 pp.
Taylor DW, LJ Hickey 1992 Phylogenetic evidence for the herbaceous
origin of angiosperms. Plant Syst Evol 180:137–156.
Thorne RF 1974 A phylogenetic classification of the Annoniflorae.
Aliso 8:147–209.
Tyree MT, FW Ewers 1991 The hydraulic architecture of trees and
other woody plants. New Phytol 119:345–360.
1996 Hydraulic architecture of wood tropical plants. Pages
217–243 in SS Mulkey, RL Chazdon, AP Smith, eds. Tropical forest
ecophysiology. Chapman & Hall, New York.
Tyree MT, B Sinclair, P Lu, A Granier 1993 Whole shoot hydraulic
resistance in Quercus species measured with a new high-pressure
flowmeter. Ann Sci For 50:417–423.
Wing SL, LD Boucher 1998 Ecological aspects of the Cretaceous
flowering plant radiation. Annu Rev Earth Planet Sci 26:379–421.
Young DA 1981 Are the angiosperms primitively vesselless? Syst Bot
6:313–330.
Zimmermann MH 1983 Xylem structure and the ascent of sap.
Springer, Berlin. 143 pp.
Zimmermann MH, AA Jeje 1981 Vessel-length distribution in stems
of some American woody plants. Can J Bot 59:1882–1892.
Zwieniecki MA, L Hutyra, MV Thompson, NM Holbrook 2000
Dynamic changes in petiole conductivity in red maple (Acer rubra
L.), tulip tree (Liriodendron tulipifera L.), and northern fox grape
(Vitis labrusca L.). Plant Cell Environ 23:407–414." name="eprints.referencetext" />
<meta content="Feild, Taylor S. and Zweiniecki, Maciej A. and Brodribb, Tim J. and Jaffre, Tanguy (2000) Structure and Function of Tracheary Elements in Amborella Trichopoda. International Journal of Plant Sciences, 161 (5). pp. 705-712. ISSN 1058-5893" name="eprints.citation" />
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<meta content="Recent phylogenetic analyses have placed the root of flowering plants near Amborella trichopoda, a woody
plant restricted to cloud forest habitats in New Caledonia. A distinctive feature of A. trichopoda is its reported
lack of xylem vessels. Here we present observations of pit membrane structure and end wall morphology for
primary and secondary tracheary cells of A. trichopoda as well as field measurements of stem hydraulic
properties of A. trichopoda compared with five cloud forest species from New Caledonia. Observations of
stem radial sections revealed that the primary wall material in the protoxylem and metaxylem elements was
intact. No large porosities (such as those that have been observed in the pit membranes of Nymphaeales) were
observed. However, a few elliptical pits of tracheary cells in the secondary xylem appeared to lack pit membranes.
These observations are consistent with our measurements of functional conduit length, which indicate
that the longest open conduits are equal to the length of two secondary xylem elements joined end to end.
Thus, the xylem of A. trichopoda appears to be functionally vesselless, with the caveat that connections between
individual vascular elements may occasionally be open (i.e., lacking in at least one pit membrane). Sapwood
area and leaf area–specific hydraulic conductivities of A. trichopoda are similar to those of conifers and
angiosperms, with and without xylem vessels, growing in understory cloud forest environments. These findings
bear on discussions of the morphology and ecology of the first flowering plants as well as on the possible
causes of their diversification." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Structure and Function of Tracheary Elements in Amborella Trichopoda</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Feild, Taylor S.</span> and <span class="person_name">Zweiniecki, Maciej A.</span> and <span class="person_name">Brodribb, Tim J.</span> and <span class="person_name">Jaffre, Tanguy</span> (2000) <xhtml:em>Structure and Function of Tracheary Elements in Amborella Trichopoda.</xhtml:em> International Journal of Plant Sciences, 161 (5). pp. 705-712. ISSN 1058-5893</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/2616/1/Amborella.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/2616/1/Amborella.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />765Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="3425" 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/10.1086/314293">http://dx.doi.org/10.1086/314293</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Recent phylogenetic analyses have placed the root of flowering plants near Amborella trichopoda, a woody
plant restricted to cloud forest habitats in New Caledonia. A distinctive feature of A. trichopoda is its reported
lack of xylem vessels. Here we present observations of pit membrane structure and end wall morphology for
primary and secondary tracheary cells of A. trichopoda as well as field measurements of stem hydraulic
properties of A. trichopoda compared with five cloud forest species from New Caledonia. Observations of
stem radial sections revealed that the primary wall material in the protoxylem and metaxylem elements was
intact. No large porosities (such as those that have been observed in the pit membranes of Nymphaeales) were
observed. However, a few elliptical pits of tracheary cells in the secondary xylem appeared to lack pit membranes.
These observations are consistent with our measurements of functional conduit length, which indicate
that the longest open conduits are equal to the length of two secondary xylem elements joined end to end.
Thus, the xylem of A. trichopoda appears to be functionally vesselless, with the caveat that connections between
individual vascular elements may occasionally be open (i.e., lacking in at least one pit membrane). Sapwood
area and leaf area–specific hydraulic conductivities of A. trichopoda are similar to those of conifers and
angiosperms, with and without xylem vessels, growing in understory cloud forest environments. These findings
bear on discussions of the morphology and ecology of the first flowering plants as well as on the possible
causes of their diversification.</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">Keywords:</th><td valign="top" class="ep_row">Amborella, basal angiosperms, xylem hydraulic conductivity, vessel evolution.</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">ID Code:</th><td valign="top" class="ep_row">2616</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">03 Dec 2007 15:11</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=2616;">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=2616">item control page</a></p>
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