<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-7380</journal-id>
<journal-title><![CDATA[Revista fitotecnia mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. fitotec. mex]]></abbrev-journal-title>
<issn>0187-7380</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitogenética A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-73802016000400339</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variabilidad genotípica en maíz nativo para eficiencia y respuesta a fósforo en etapa de floración]]></article-title>
<article-title xml:lang="en"><![CDATA[Native maize genotypic variability for phosphorus efficiency and responsiveness at the flowering stage]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Torres]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ochoa-Cadavid]]></surname>
<given-names><![CDATA[Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Preciado-Ortíz]]></surname>
<given-names><![CDATA[Ricardo E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bayuelo-Jiménez]]></surname>
<given-names><![CDATA[Jeannette S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Instituto de Investigaciones Agropecuarias y Forestales Unidad San Juanito Itzícuaro]]></institution>
<addr-line><![CDATA[ Michoacán]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Unipalma S.A. Subdirección de Investigación y Desarrollo ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>39</volume>
<numero>4</numero>
<fpage>339</fpage>
<lpage>347</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802016000400339&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802016000400339&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802016000400339&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La reducida disponibilidad de fósforo (P) en el suelo limita el rendimiento de los cultivos. El desarrollo de cultivares con tolerancia a la deficiencia de P puede representar una solución más sostenible que la que depende solamente de la aplicación de fertilizantes fosforados. Se estudió la variabilidad genotípica de maíz (Zea mays L.) de la Meseta P'urhépecha en Michoacán, México para eficiencia y respuesta a P, en la etapa de floración. El estudio incluyó cuatro localidades con 27 genotipos cultivados en suelos con deficiencia de P, con una dosis de fertilización reducida (25 kg P2O5 ha-1) (BP) y alta (50 kg P2O5 ha-1) (AP). Los genotipos de maíz difirieron en crecimiento vegetativo y eficiencia a P, definida como el crecimiento sostenido en condiciones de baja disponibilidad de P. Los 27 genotipos se agruparon en tres categorías de eficiencia con base en sus parámetros de crecimiento en BP y sus valores relativos al tratamiento de AP y en cuatro categorías de acuerdo con el valor del índice de eficiencia a P en combinación con la respuesta en crecimiento en AP. La distribución de los genotipos entre los tres grupos de eficiencia y respuesta a P fue estable en todas las localidades. Los genotipos SHUI-2 (6), ZR-6 (75), Paso del Muerto (113), Tepetate (206) y Macho II-04 (230) fueron los más eficientes en BP y los que respondieron a la alta fertilización. Los genotipos eficientes tuvieron una mayor producción de materia seca y contenido de P en la planta y una mayor eficiencia en la absorción de P. La maduración tardía de los genotipos eficientes propició un incremento en la adquisición de P del suelo y mayor crecimiento en BP. Estos resultados indican que existe variabilidad genotípica para la eficiencia y respuesta a P en el germoplasma de maíz.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Phosphorus (P) deficiency can severely limit maize yield. Efforts to develop cultivars with tolerance to P deficiency represent a solution which is more sustainable than sole reliance on P fertilizer application. This study evaluated genotypic variability in P efficiency and response at the flowering stage of maize (Zea mays L.) accessions from the P'urhépecha Plateau, at Michoacán, México. Twenty-seven accessions were grown on P-deficient andosol, at four locations with low (25 kg P2O5ha-1) and high (50 kg P2O3ha-1) P fertilization under rain-fed conditions. The accessions differed greatly in their growth and P efficiency, defined as growth under suboptimal P availability. They were divided into three categories based on P efficiency, and four categories according to P efficiency in combination with high P response. The distribution of accessions among three P efficiency classes was stable across locations. Accessions SHUI-2 (6), ZR-6 (75), Paso del Muerto (113), Tepetate (206) and Macho II-04 (230) had the highest efficiency under low P and also responded to high P fertilization. P-efficient accessions had greater biomass, P tissue content and P acquisition efficiency (PAE) under P deficiency. Late maturity of P efficient genotypes improved PAE and growth under low P. These results indicate that maize landraces from the P'urhépecha Plateau exhibit genotypic variation for P efficiency and P responsiveness. ]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Zea mays]]></kwd>
<kwd lng="es"><![CDATA[crecimiento]]></kwd>
<kwd lng="es"><![CDATA[eficiencia en absorción de P]]></kwd>
<kwd lng="es"><![CDATA[madurez tardía]]></kwd>
<kwd lng="es"><![CDATA[suelos ácidos]]></kwd>
<kwd lng="en"><![CDATA[Zea mays]]></kwd>
<kwd lng="en"><![CDATA[plant growth]]></kwd>
<kwd lng="en"><![CDATA[P acquisition efficiency]]></kwd>
<kwd lng="en"><![CDATA[late maturity]]></kwd>
<kwd lng="en"><![CDATA[acid soils]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Clasificación de los suelos de la Meseta Tarasca, Michoacán]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alcalá]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ortiz-Solorio]]></surname>
<given-names><![CDATA[C. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Gutiérrez-Castorena]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Terra]]></source>
<year>2001</year>
<volume>19</volume>
<page-range>217-39</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Phosphorus acquisition and internal utilization efficiency among maize landraces from the central Mexican highlands]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bayuelo-Jiménez]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Ochoa-Cadavid]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Field Crops Research]]></source>
<year>2014</year>
<volume>156</volume>
<page-range>123-34</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Eficiencia a fósforo del germoplasma de maíz de la meseta P'urhépecha en etapa de plántula]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bayuelo-Jiménez]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez-Decelis]]></surname>
<given-names><![CDATA[V. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Magdaleno-Armas]]></surname>
<given-names><![CDATA[M. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Ochoa]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Cárdenas-Navarro]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Revista Fitotecnia Mexicana]]></source>
<year>2012</year>
<volume>35</volume>
<page-range>199-208</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genotypic variation for root traits of maize (Zea mays L.) from P'urhépecha Plateau, under contrasting phosphorus availability]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bayuelo-Jiménez]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez-Decelis]]></surname>
<given-names><![CDATA[V. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Magdaleno-Armas]]></surname>
<given-names><![CDATA[M. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Gallardo-Valdéz]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ochoa]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Lynch]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Field Crops Research]]></source>
<year>2011</year>
<volume>121</volume>
<page-range>350-62</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The role of nutrient efficient plants in improving crop yields in the twenty first century]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fageria]]></surname>
<given-names><![CDATA[N. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Baligar]]></surname>
<given-names><![CDATA[V. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Y. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Plant Nutrition]]></source>
<year>2008</year>
<volume>1</volume>
<page-range>1121-57</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gerloff]]></surname>
<given-names><![CDATA[G. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Plant efficiencies in the use of N, P and K]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Wright]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Plant Adaptation to Mineral Stress in Problem Soils]]></source>
<year>1977</year>
<page-range>161-74</page-range><publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Cornell University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Steep, cheap and deep: an ideotype to optimize water and N acquisition by maize root systems]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lynch]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Annals of Botany]]></source>
<year>2013</year>
<volume>112</volume>
<page-range>347-57</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Developing phosphorus-efficient crops varieties-An interdisciplinary research framework]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Manschadi]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Hans-Peter]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Vollmann]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Eitzinger]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wenzel]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Field Crops Research]]></source>
<year>2014</year>
<volume>162</volume>
<page-range>87-98</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The effect of soil water status on fertilizer, topsoil and subsoil phosphorus utilization by wheat]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[McBeath]]></surname>
<given-names><![CDATA[T. M.]]></given-names>
</name>
<name>
<surname><![CDATA[McLaughlin]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Kirby]]></surname>
<given-names><![CDATA[J. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Armstrong]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Plant and Soil]]></source>
<year>2012</year>
<volume>358</volume>
<page-range>337-48</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<article-title xml:lang=""><![CDATA[Descifrando la diversidad del maíz en los nichos ecológicos de México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[O. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Centli Maíz (Prehistoria e historia, diversidad, potencial, origen genético y geográfico)]]></source>
<year>2003</year>
<page-range>83-159</page-range><publisher-loc><![CDATA[Montecillo, México ]]></publisher-loc>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A modified single solution method for the determination of phosphate in natural waters]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Murphy]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Riley]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Analytical Chemical Acta]]></source>
<year>1962</year>
<volume>27</volume>
<page-range>31-6</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Cereal landraces for sustainable agriculture: A review]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Newton]]></surname>
<given-names><![CDATA[A. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Akar]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Baresel]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Bebeli]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bettencourt]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Bladenopoulos]]></surname>
<given-names><![CDATA[K. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Czembor]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Fasoula]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Katsiotis]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Koutis]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Kovacs]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Larsson]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Pinheiro de Carvalho]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Rubiales]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Russel]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Dos Santos]]></surname>
<given-names><![CDATA[T. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Vaz Patto]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agronomy Sustainable Development]]></source>
<year>2010</year>
<volume>30</volume>
<page-range>237-69</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Plant phenology: a critical controller of soil resource acquisition]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nord]]></surname>
<given-names><![CDATA[E. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lynch]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Experimental Botany]]></source>
<year>2009</year>
<volume>60</volume>
<page-range>1927-37</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Assessment on phosphorus efficiency characteristics of soybean genotypes in phosphorus deficient soils]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pan]]></surname>
<given-names><![CDATA[X. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[W. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[Q. Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Y. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[M. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agricultural Science in China]]></source>
<year>2008</year>
<volume>7</volume>
<page-range>958-69</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The optimal lateral root branching density for maize depends on nitrogen and phosphorus availability]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Postma]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Dathe]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lynch]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Plant Physiology]]></source>
<year>2014</year>
<volume>166</volume>
<page-range>590-602</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Romerburg]]></surname>
<given-names><![CDATA[H. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Cluster Analysis for Researches]]></source>
<year>1984</year>
<publisher-loc><![CDATA[Belmont, California ]]></publisher-loc>
<publisher-name><![CDATA[Lifetime Learning Publications]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<collab>SAS</collab>
<source><![CDATA[SAS User &#769;s Guide: Statistics]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Cary, NC ]]></publisher-loc>
<publisher-name><![CDATA[SAS Institute, Inc.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Strategies and agronomic interventions to improve the phosphorus-use efficiency of farming systems]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Simpson]]></surname>
<given-names><![CDATA[R. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Oberson]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Culvenor]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ryan]]></surname>
<given-names><![CDATA[M. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Veneklaas]]></surname>
<given-names><![CDATA[E. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Lambers]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Lynch]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Ryan]]></surname>
<given-names><![CDATA[P. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Delhaize]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[F. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[S. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Harvey]]></surname>
<given-names><![CDATA[P. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Richardson]]></surname>
<given-names><![CDATA[A. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Plant and Soil]]></source>
<year>2011</year>
<volume>349</volume>
<page-range>89-120</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Plant acquisition or utilization, which is more critical for enhancing phosphorus efficiency in modern crops]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Shen]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Liao]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Plant Science]]></source>
<year>2010</year>
<volume>179</volume>
<page-range>302-6</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Topsoil foraging and phosphorus acquisition efficiency in maize (Zea mays L.)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhu]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Kaeppler]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Lynch]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Functional Plant Biology]]></source>
<year>2005</year>
<volume>32</volume>
<page-range>1-14</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
