<?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>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822023000100033</article-id>
<article-id pub-id-type="doi">10.18845/tm.v36i1.5899</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Primer informe sobre heteroblastia en protofilas de tacaco (Sechium tacaco)]]></article-title>
<article-title xml:lang=""><![CDATA[First report on heteroblasty in tacaco (Sechium tacaco) protophylls]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monge-Pérez]]></surname>
<given-names><![CDATA[José Eladio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Loría-Coto]]></surname>
<given-names><![CDATA[Michelle]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Estatal a Distancia  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2023</year>
</pub-date>
<volume>36</volume>
<numero>1</numero>
<fpage>33</fpage>
<lpage>41</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822023000100033&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822023000100033&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822023000100033&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del trabajo fue realizar observaciones en las protofilas de plántulas de tacaco. Se sembraron 50 semillas de tacaco, y se evaluaron las protofilas de las plántulas emergidas, hasta los 91 días después de siembra. Se encontraron protofilas con uno, dos, tres, cuatro, cinco, seis y siete lóbulos cada una. En la presente investigación se informa por primera vez sobre la existencia de heteroblastia (diferente número de lóbulos) en las protofilas de tacaco, lo que representa un hallazgo que puede ilustrar los cambios evolutivos recientes de esta especie.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective of the study was to make observations on the protophylls of tacaco seedlings. 50 tacaco seeds were sown, and the protophylls of the emerged seedlings were evaluated, up to 91 days after sowing. Protophylls with one, two, three, four, five, six and seven lobes each were found. This is the first notice about the existence of heteroblasty (different number of lobes) in tacaco protophylls; this could illustrate the recent evolutive changes of this species.]]></p></abstract>
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<kwd lng="es"><![CDATA[hoja]]></kwd>
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<kwd lng="es"><![CDATA[tallo]]></kwd>
<kwd lng="en"><![CDATA[Botany]]></kwd>
<kwd lng="en"><![CDATA[cucurbitaceae]]></kwd>
<kwd lng="en"><![CDATA[leaf]]></kwd>
<kwd lng="en"><![CDATA[morphology]]></kwd>
<kwd lng="en"><![CDATA[stem]]></kwd>
</kwd-group>
</article-meta>
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