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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">The effect of drought stress on heterozygosity–fitness correlations in pedunculate oak (<italic>Quercus robur</italic>
)</title>
<author><name sortKey="Vranckx, Guy" sort="Vranckx, Guy" uniqKey="Vranckx G" first="Guy" last="Vranckx">Guy Vranckx</name>
<affiliation><nlm:aff id="af1"><addr-line>Plant Conservation and Population Biology, Biology Department, University of Leuven, Kasteelpark Arenberg 31, Box 2435, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Jacquemyn, Hans" sort="Jacquemyn, Hans" uniqKey="Jacquemyn H" first="Hans" last="Jacquemyn">Hans Jacquemyn</name>
<affiliation><nlm:aff id="af1"><addr-line>Plant Conservation and Population Biology, Biology Department, University of Leuven, Kasteelpark Arenberg 31, Box 2435, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Mergeay, Joachim" sort="Mergeay, Joachim" uniqKey="Mergeay J" first="Joachim" last="Mergeay">Joachim Mergeay</name>
<affiliation><nlm:aff id="af2"><addr-line>Research Institute for Nature and Forest (INBO), Flemish Government, Gaverstraat 4, 9500 Geraardsbergen, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Cox, Karen" sort="Cox, Karen" uniqKey="Cox K" first="Karen" last="Cox">Karen Cox</name>
<affiliation><nlm:aff id="af2"><addr-line>Research Institute for Nature and Forest (INBO), Flemish Government, Gaverstraat 4, 9500 Geraardsbergen, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Janssens, Pieter" sort="Janssens, Pieter" uniqKey="Janssens P" first="Pieter" last="Janssens">Pieter Janssens</name>
<affiliation><nlm:aff id="af4"><addr-line>Soil Service of Belgium, Willem de Croylaan 48, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Gielen, Bie An Sofie" sort="Gielen, Bie An Sofie" uniqKey="Gielen B" first="Bie An Sofie" last="Gielen">Bie An Sofie Gielen</name>
<affiliation><nlm:aff id="af3"><addr-line>Division of Forest, Nature and Landscape, University of Leuven, Celestijnenlaan 200E, Box 2411, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Muys, Bart" sort="Muys, Bart" uniqKey="Muys B" first="Bart" last="Muys">Bart Muys</name>
<affiliation><nlm:aff id="af3"><addr-line>Division of Forest, Nature and Landscape, University of Leuven, Celestijnenlaan 200E, Box 2411, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Honnay, Olivier" sort="Honnay, Olivier" uniqKey="Honnay O" first="Olivier" last="Honnay">Olivier Honnay</name>
<affiliation><nlm:aff id="af1"><addr-line>Plant Conservation and Population Biology, Biology Department, University of Leuven, Kasteelpark Arenberg 31, Box 2435, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">PMC</idno>
<idno type="pmid">24638819</idno>
<idno type="pmc">3997642</idno>
<idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3997642</idno>
<idno type="RBID">PMC:3997642</idno>
<idno type="doi">10.1093/aob/mcu025</idno>
<date when="2014">2014</date>
<idno type="wicri:Area/Pmc/Corpus">000133</idno>
<idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000133</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">The effect of drought stress on heterozygosity–fitness correlations in pedunculate oak (<italic>Quercus robur</italic>
)</title>
<author><name sortKey="Vranckx, Guy" sort="Vranckx, Guy" uniqKey="Vranckx G" first="Guy" last="Vranckx">Guy Vranckx</name>
<affiliation><nlm:aff id="af1"><addr-line>Plant Conservation and Population Biology, Biology Department, University of Leuven, Kasteelpark Arenberg 31, Box 2435, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Jacquemyn, Hans" sort="Jacquemyn, Hans" uniqKey="Jacquemyn H" first="Hans" last="Jacquemyn">Hans Jacquemyn</name>
<affiliation><nlm:aff id="af1"><addr-line>Plant Conservation and Population Biology, Biology Department, University of Leuven, Kasteelpark Arenberg 31, Box 2435, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Mergeay, Joachim" sort="Mergeay, Joachim" uniqKey="Mergeay J" first="Joachim" last="Mergeay">Joachim Mergeay</name>
<affiliation><nlm:aff id="af2"><addr-line>Research Institute for Nature and Forest (INBO), Flemish Government, Gaverstraat 4, 9500 Geraardsbergen, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Cox, Karen" sort="Cox, Karen" uniqKey="Cox K" first="Karen" last="Cox">Karen Cox</name>
<affiliation><nlm:aff id="af2"><addr-line>Research Institute for Nature and Forest (INBO), Flemish Government, Gaverstraat 4, 9500 Geraardsbergen, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Janssens, Pieter" sort="Janssens, Pieter" uniqKey="Janssens P" first="Pieter" last="Janssens">Pieter Janssens</name>
<affiliation><nlm:aff id="af4"><addr-line>Soil Service of Belgium, Willem de Croylaan 48, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Gielen, Bie An Sofie" sort="Gielen, Bie An Sofie" uniqKey="Gielen B" first="Bie An Sofie" last="Gielen">Bie An Sofie Gielen</name>
<affiliation><nlm:aff id="af3"><addr-line>Division of Forest, Nature and Landscape, University of Leuven, Celestijnenlaan 200E, Box 2411, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Muys, Bart" sort="Muys, Bart" uniqKey="Muys B" first="Bart" last="Muys">Bart Muys</name>
<affiliation><nlm:aff id="af3"><addr-line>Division of Forest, Nature and Landscape, University of Leuven, Celestijnenlaan 200E, Box 2411, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Honnay, Olivier" sort="Honnay, Olivier" uniqKey="Honnay O" first="Olivier" last="Honnay">Olivier Honnay</name>
<affiliation><nlm:aff id="af1"><addr-line>Plant Conservation and Population Biology, Biology Department, University of Leuven, Kasteelpark Arenberg 31, Box 2435, 3001 Leuven, Belgium</addr-line>
</nlm:aff>
</affiliation>
</author>
</analytic>
<series><title level="j">Annals of Botany</title>
<idno type="ISSN">0305-7364</idno>
<idno type="eISSN">1095-8290</idno>
<imprint><date when="2014">2014</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass></textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en"><sec><title>Background and Aims</title>
<p>The interaction between forest fragmentation and predicted climate change may pose a serious threat to tree populations. In small and spatially isolated forest fragments, increased homozygosity may directly affect individual tree fitness through the expression of deleterious alleles. Climate change-induced drought stress may exacerbate these detrimental genetic consequences of forest fragmentation, as the fitness response to low levels of individual heterozygosity is generally thought to be stronger under environmental stress than under optimal conditions.</p>
</sec>
<sec><title>Methods</title>
<p>To test this hypothesis, a greenhouse experiment was performed in which various transpiration and growth traits of 6-month-old seedlings of <italic>Quercus robur</italic>
differing in multilocus heterozygosity (MLH) were recorded for 3 months under a well-watered and a drought stress treatment. Heterozygosity–fitness correlations (HFC) were examined by correlating the recorded traits of individual seedlings to their MLH and by studying their response to drought stress.</p>
</sec>
<sec><title>Key Results</title>
<p>Weak, but significant, effects of MLH on several fitness traits were obtained, which were stronger for transpiration variables than for the recorded growth traits. High atmospheric stress (measured as vapour pressure deficit) influenced the strength of the HFCs of the transpiration variables, whereas only a limited effect of the irrigation treatment on the HFCs was observed.</p>
</sec>
<sec><title>Conclusions</title>
<p>Under ongoing climate change, increased atmospheric stress in the future may strengthen the negative fitness responses of trees to low MLH. This indicates the necessity to maximize individual multilocus heterozygosity in forest tree breeding programmes.</p>
</sec>
</div>
</front>
</TEI>
<pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Ann Bot</journal-id>
<journal-id journal-id-type="iso-abbrev">Ann. Bot</journal-id>
<journal-id journal-id-type="publisher-id">annbot</journal-id>
<journal-id journal-id-type="hwp">annbot</journal-id>
<journal-title-group><journal-title>Annals of Botany</journal-title>
</journal-title-group>
<issn pub-type="ppub">0305-7364</issn>
<issn pub-type="epub">1095-8290</issn>
<publisher><publisher-name>Oxford University Press</publisher-name>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">24638819</article-id>
<article-id pub-id-type="pmc">3997642</article-id>
<article-id pub-id-type="doi">10.1093/aob/mcu025</article-id>
<article-id pub-id-type="publisher-id">mcu025</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Original Articles</subject>
</subj-group>
<subj-group subj-group-type="hwp-journal-coll"><subject>1002</subject>
</subj-group>
</article-categories>
<title-group><article-title>The effect of drought stress on heterozygosity–fitness correlations in pedunculate oak (<italic>Quercus robur</italic>
)</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Vranckx</surname>
<given-names>Guy</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
<xref ref-type="corresp" rid="cor1">*</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Jacquemyn</surname>
<given-names>Hans</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Mergeay</surname>
<given-names>Joachim</given-names>
</name>
<xref ref-type="aff" rid="af2">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Cox</surname>
<given-names>Karen</given-names>
</name>
<xref ref-type="aff" rid="af2">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Janssens</surname>
<given-names>Pieter</given-names>
</name>
<xref ref-type="aff" rid="af4">4</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Gielen</surname>
<given-names>Bie An Sofie</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Muys</surname>
<given-names>Bart</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Honnay</surname>
<given-names>Olivier</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
</contrib>
</contrib-group>
<aff id="af1"><label>1</label>
<addr-line>Plant Conservation and Population Biology, Biology Department, University of Leuven, Kasteelpark Arenberg 31, Box 2435, 3001 Leuven, Belgium</addr-line>
</aff>
<aff id="af2"><label>2</label>
<addr-line>Research Institute for Nature and Forest (INBO), Flemish Government, Gaverstraat 4, 9500 Geraardsbergen, Belgium</addr-line>
</aff>
<aff id="af3"><label>3</label>
<addr-line>Division of Forest, Nature and Landscape, University of Leuven, Celestijnenlaan 200E, Box 2411, 3001 Leuven, Belgium</addr-line>
</aff>
<aff id="af4"><label>4</label>
<addr-line>Soil Service of Belgium, Willem de Croylaan 48, 3001 Leuven, Belgium</addr-line>
</aff>
<author-notes><corresp id="cor1"><label>*</label>
For correspondence. E-mail <email>Guy.vranckx@bio.kuleuven.be</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub"><month>5</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub"><day>16</day>
<month>3</month>
<year>2014</year>
</pub-date>
<volume>113</volume>
<issue>6</issue>
<fpage>1057</fpage>
<lpage>1069</lpage>
<history><date date-type="received"><day>21</day>
<month>8</month>
<year>2013</year>
</date>
<date date-type="rev-request"><day>13</day>
<month>12</month>
<year>2013</year>
</date>
<date date-type="accepted"><day>7</day>
<month>2</month>
<year>2014</year>
</date>
</history>
<permissions><copyright-statement>© The Author 2014. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oup.com</copyright-statement>
<copyright-year>2014</copyright-year>
</permissions>
<self-uri content-type="pdf" xlink:type="simple" xlink:href="mcu025.pdf"></self-uri>
<abstract><sec><title>Background and Aims</title>
<p>The interaction between forest fragmentation and predicted climate change may pose a serious threat to tree populations. In small and spatially isolated forest fragments, increased homozygosity may directly affect individual tree fitness through the expression of deleterious alleles. Climate change-induced drought stress may exacerbate these detrimental genetic consequences of forest fragmentation, as the fitness response to low levels of individual heterozygosity is generally thought to be stronger under environmental stress than under optimal conditions.</p>
</sec>
<sec><title>Methods</title>
<p>To test this hypothesis, a greenhouse experiment was performed in which various transpiration and growth traits of 6-month-old seedlings of <italic>Quercus robur</italic>
differing in multilocus heterozygosity (MLH) were recorded for 3 months under a well-watered and a drought stress treatment. Heterozygosity–fitness correlations (HFC) were examined by correlating the recorded traits of individual seedlings to their MLH and by studying their response to drought stress.</p>
</sec>
<sec><title>Key Results</title>
<p>Weak, but significant, effects of MLH on several fitness traits were obtained, which were stronger for transpiration variables than for the recorded growth traits. High atmospheric stress (measured as vapour pressure deficit) influenced the strength of the HFCs of the transpiration variables, whereas only a limited effect of the irrigation treatment on the HFCs was observed.</p>
</sec>
<sec><title>Conclusions</title>
<p>Under ongoing climate change, increased atmospheric stress in the future may strengthen the negative fitness responses of trees to low MLH. This indicates the necessity to maximize individual multilocus heterozygosity in forest tree breeding programmes.</p>
</sec>
</abstract>
<kwd-group><kwd>Climate change</kwd>
<kwd>drought stress</kwd>
<kwd>forest fragmentation</kwd>
<kwd>greenhouse experiment</kwd>
<kwd>growth traits</kwd>
<kwd>heterozygosity–fitness correlations</kwd>
<kwd>pedunculate oak</kwd>
<kwd><italic>Quercus robur</italic>
</kwd>
<kwd>transpiration</kwd>
</kwd-group>
</article-meta>
</front>
</pmc>
</record>
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