Using modern plant trait relationships between observed and theoretical maximum stomatal conductance and vein density to examine patterns of plant macroevolution
Identifieur interne : 001069 ( Pmc/Curation ); précédent : 001068; suivant : 001070Using modern plant trait relationships between observed and theoretical maximum stomatal conductance and vein density to examine patterns of plant macroevolution
Auteurs : Jennifer C. Mcelwain ; Charilaos Yiotis ; Tracy LawsonSource :
- The New Phytologist [ 0028-646X ] ; 2015.
Abstract
Understanding the drivers of geological‐scale patterns in plant macroevolution is limited by a hesitancy to use measurable traits of fossils to infer palaeoecophysiological function. Here, scaling relationships between morphological traits including maximum theoretical stomatal conductance ( Our study demonstrated significant relationships between Expansion of the ecophysiological niche space in angiosperms, afforded by coordinated evolution of high
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DOI: 10.1111/nph.13579
PubMed: 26230251
PubMed Central: 5014202
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<author><name sortKey="Mcelwain, Jennifer C" sort="Mcelwain, Jennifer C" uniqKey="Mcelwain J" first="Jennifer C." last="Mcelwain">Jennifer C. Mcelwain</name>
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<front><div type="abstract" xml:lang="en"><title>Summary</title>
<p><list list-type="bullet" id="nph13579-list-0001"><list-item><p>Understanding the drivers of geological‐scale patterns in plant macroevolution is limited by a hesitancy to use measurable traits of fossils to infer palaeoecophysiological function.</p>
</list-item>
<list-item><p>Here, scaling relationships between morphological traits including maximum theoretical stomatal conductance (<italic>g</italic>
<sub>max</sub>
) and leaf vein density (<italic>D</italic>
<sub>v</sub>
) and physiological measurements including operational stomatal conductance (<italic>g</italic>
<sub>op</sub>
), saturated (<italic>A</italic>
<sub>sat</sub>
<italic>)</italic>
and maximum (<italic>A</italic>
<sub>max</sub>
) assimilation rates were investigated for 18 extant taxa in order to improve understanding of angiosperm diversification in the Cretaceous.</p>
</list-item>
<list-item><p>Our study demonstrated significant relationships between <italic>g</italic>
<sub>op</sub>
, <italic>g</italic>
<sub>max</sub>
and <italic>D</italic>
<sub>v</sub>
that together can be used to estimate gas exchange and the photosynthetic capacities of fossils. We showed that acquisition of high <italic>g</italic>
<sub>max</sub>
in angiosperms conferred a competitive advantage over gymnosperms by increasing the dynamic range (plasticity) of their gas exchange and expanding their ecophysiological niche space. We suggest that species with a high <italic>g</italic>
<sub>max</sub>
(> 1400 mmol m<sup>−2</sup>
s<sup>−1</sup>
) would have been capable of maintaining a high <italic>A</italic>
<sub>max</sub>
as the atmospheric <styled-content style="fixed-case">CO</styled-content>
<sub>2</sub>
declined through the Cretaceous, whereas gymnosperms with a low <italic>g</italic>
<sub>max</sub>
would experience severe photosynthetic penalty.</p>
</list-item>
<list-item><p>Expansion of the ecophysiological niche space in angiosperms, afforded by coordinated evolution of high <italic>g</italic>
<sub>max</sub>
<italic>, D</italic>
<sub>v</sub>
and increased plasticity in <italic>g</italic>
<sub>op</sub>
<italic>,</italic>
adds further functional insights into the mechanisms driving angiosperm speciation.</p>
</list-item>
</list>
</p>
</div>
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<front><journal-meta><journal-id journal-id-type="nlm-ta">New Phytol</journal-id>
<journal-id journal-id-type="iso-abbrev">New Phytol</journal-id>
<journal-id journal-id-type="doi">10.1111/(ISSN)1469-8137</journal-id>
<journal-id journal-id-type="publisher-id">NPH</journal-id>
<journal-title-group><journal-title>The New Phytologist</journal-title>
</journal-title-group>
<issn pub-type="ppub">0028-646X</issn>
<issn pub-type="epub">1469-8137</issn>
<publisher><publisher-name>John Wiley and Sons Inc.</publisher-name>
<publisher-loc>Hoboken</publisher-loc>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">26230251</article-id>
<article-id pub-id-type="pmc">5014202</article-id>
<article-id pub-id-type="doi">10.1111/nph.13579</article-id>
<article-id pub-id-type="publisher-id">NPH13579</article-id>
<article-id pub-id-type="other">2015-19478</article-id>
<article-categories><subj-group subj-group-type="overline"><subject>Full Paper</subject>
</subj-group>
<subj-group subj-group-type="heading"><subject>Research</subject>
<subj-group subj-group-type="heading"><subject>Full Papers</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group><article-title>Using modern plant trait relationships between observed and theoretical maximum stomatal conductance and vein density to examine patterns of plant macroevolution</article-title>
</title-group>
<contrib-group><contrib id="nph13579-cr-0001" contrib-type="author" corresp="yes"><name><surname>McElwain</surname>
<given-names>Jennifer C.</given-names>
</name>
<xref ref-type="aff" rid="nph13579-aff-0001"><sup>1</sup>
</xref>
<xref ref-type="aff" rid="nph13579-aff-0002"><sup>2</sup>
</xref>
</contrib>
<contrib id="nph13579-cr-0002" contrib-type="author"><name><surname>Yiotis</surname>
<given-names>Charilaos</given-names>
</name>
<xref ref-type="aff" rid="nph13579-aff-0001"><sup>1</sup>
</xref>
<xref ref-type="aff" rid="nph13579-aff-0002"><sup>2</sup>
</xref>
</contrib>
<contrib id="nph13579-cr-0003" contrib-type="author"><name><surname>Lawson</surname>
<given-names>Tracy</given-names>
</name>
<xref ref-type="aff" rid="nph13579-aff-0003"><sup>3</sup>
</xref>
</contrib>
</contrib-group>
<aff id="nph13579-aff-0001"><label><sup>1</sup>
</label>
<named-content content-type="organisation-division">Earth Institute</named-content>
<named-content content-type="organisation-division">O'Brien Centre for Science</named-content>
<institution>University College Dublin</institution>
<named-content content-type="city">Belfield</named-content>
<country country="IE">Ireland</country>
</aff>
<aff id="nph13579-aff-0002"><label><sup>2</sup>
</label>
<named-content content-type="organisation-division">School of Biology and Environmental Science</named-content>
<institution>University College Dublin</institution>
<named-content content-type="city">Belfield</named-content>
<country country="IE">Ireland</country>
</aff>
<aff id="nph13579-aff-0003"><label><sup>3</sup>
</label>
<named-content content-type="organisation-division">School of Biological Science</named-content>
<institution>University of Essex</institution>
<named-content content-type="city">Colchester</named-content>
<named-content content-type="post-code">CO4 3SQ</named-content>
<country country="GB">UK</country>
</aff>
<author-notes><corresp id="correspondenceTo"><label>*</label>
Author for correspondence:<break></break>
<italic>Jennifer C. McElwain</italic>
<break></break>
<italic>Tel: +00 353 17162524</italic>
<break></break>
<italic>Email: </italic>
<email>jennifer.mcelwain@ucd.ie</email>
<break></break>
</corresp>
</author-notes>
<pub-date pub-type="ppub"><month>1</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub"><day>31</day>
<month>7</month>
<year>2015</year>
</pub-date>
<volume>209</volume>
<issue>1</issue>
<issue-id pub-id-type="doi">10.1111/nph.2016.209.issue-1</issue-id>
<fpage>94</fpage>
<lpage>103</lpage>
<history><date date-type="received"><day>26</day>
<month>3</month>
<year>2015</year>
</date>
<date date-type="accepted"><day>27</day>
<month>6</month>
<year>2015</year>
</date>
</history>
<permissions><pmc-comment> Copyright © 2015 New Phytologist Trust </pmc-comment>
<copyright-statement content-type="article-copyright">© 2015 The Authors. New Phytologist © 2015 New Phytologist Trust</copyright-statement>
<license license-type="creativeCommonsBy"><license-p>This is an open access article under the terms of the <ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution</ext-link>
License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.</license-p>
</license>
</permissions>
<self-uri content-type="pdf" xlink:type="simple" xlink:href="file:NPH-209-94.pdf"></self-uri>
<abstract id="nph13579-abs-0001"><title>Summary</title>
<p><list list-type="bullet" id="nph13579-list-0001"><list-item><p>Understanding the drivers of geological‐scale patterns in plant macroevolution is limited by a hesitancy to use measurable traits of fossils to infer palaeoecophysiological function.</p>
</list-item>
<list-item><p>Here, scaling relationships between morphological traits including maximum theoretical stomatal conductance (<italic>g</italic>
<sub>max</sub>
) and leaf vein density (<italic>D</italic>
<sub>v</sub>
) and physiological measurements including operational stomatal conductance (<italic>g</italic>
<sub>op</sub>
), saturated (<italic>A</italic>
<sub>sat</sub>
<italic>)</italic>
and maximum (<italic>A</italic>
<sub>max</sub>
) assimilation rates were investigated for 18 extant taxa in order to improve understanding of angiosperm diversification in the Cretaceous.</p>
</list-item>
<list-item><p>Our study demonstrated significant relationships between <italic>g</italic>
<sub>op</sub>
, <italic>g</italic>
<sub>max</sub>
and <italic>D</italic>
<sub>v</sub>
that together can be used to estimate gas exchange and the photosynthetic capacities of fossils. We showed that acquisition of high <italic>g</italic>
<sub>max</sub>
in angiosperms conferred a competitive advantage over gymnosperms by increasing the dynamic range (plasticity) of their gas exchange and expanding their ecophysiological niche space. We suggest that species with a high <italic>g</italic>
<sub>max</sub>
(> 1400 mmol m<sup>−2</sup>
s<sup>−1</sup>
) would have been capable of maintaining a high <italic>A</italic>
<sub>max</sub>
as the atmospheric <styled-content style="fixed-case">CO</styled-content>
<sub>2</sub>
declined through the Cretaceous, whereas gymnosperms with a low <italic>g</italic>
<sub>max</sub>
would experience severe photosynthetic penalty.</p>
</list-item>
<list-item><p>Expansion of the ecophysiological niche space in angiosperms, afforded by coordinated evolution of high <italic>g</italic>
<sub>max</sub>
<italic>, D</italic>
<sub>v</sub>
and increased plasticity in <italic>g</italic>
<sub>op</sub>
<italic>,</italic>
adds further functional insights into the mechanisms driving angiosperm speciation.</p>
</list-item>
</list>
</p>
</abstract>
<kwd-group kwd-group-type="author-generated"><kwd id="nph13579-kwd-0001">evolution of angiosperms</kwd>
<kwd id="nph13579-kwd-0002">functional traits</kwd>
<kwd id="nph13579-kwd-0003">maximum theoretical stomatal conductance (<italic>g</italic>
<sub>max</sub>
)</kwd>
<kwd id="nph13579-kwd-0004">palaeophysiology</kwd>
<kwd id="nph13579-kwd-0005">plasticity</kwd>
<kwd id="nph13579-kwd-0006">stomatal density</kwd>
<kwd id="nph13579-kwd-0007">stomatal evolution</kwd>
<kwd id="nph13579-kwd-0008">vein density (<italic>D</italic>
<sub>v</sub>
)</kwd>
</kwd-group>
<funding-group><award-group><funding-source>Science Foundation Ireland</funding-source>
<award-id>SFI‐PI‐1103</award-id>
</award-group>
</funding-group>
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<notes><fn-group id="nph13579-ntgp-0001"><fn id="nph13579-note-0111"><p>The copyright line for this article was changed on 19 August 2015 after original online publication.</p>
</fn>
</fn-group>
</notes>
</front>
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