<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992019000300553</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.03.03</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[AZOXYSTROBIN INDUCES CHROMOSOMAL ABERRATIONS IN ROOTS OF THE HYDROPHYTE Bidens laevis L.]]></article-title>
<article-title xml:lang="es"><![CDATA[LA AZOXISTROBINA INDUCE ABERRACIONES CROMOSÓMICAS EN RAÍCES DE LA HIDRÓFITA Bidens laevis L.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[Débora Jesabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Menone]]></surname>
<given-names><![CDATA[Mirta Luján]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tognetti]]></surname>
<given-names><![CDATA[Jorge Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lukaszewicz]]></surname>
<given-names><![CDATA[Germán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Mar del Plata Facultad de Ciencias Exactas y Naturales Laboratorio de Ecotoxicología]]></institution>
<addr-line><![CDATA[Mar del Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Consejo Nacional de Investigaciones Científicas y Técnicas  ]]></institution>
<addr-line><![CDATA[Ciudad Autónoma de Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Mar del Plata Instituto de Investigaciones Marinas y Costeras Consejo Nacional de Investigaciones Científicas y Técnicas]]></institution>
<addr-line><![CDATA[Mar del Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional de Mar del Plata Facultad de Ciencias Agrarias Laboratorio de Fisiología Vegetal]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Comisión de Investigaciones Científicas  ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>35</volume>
<numero>3</numero>
<fpage>553</fpage>
<lpage>563</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000300553&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000300553&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000300553&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Aquatic plants can be used as in situ bioindicators of water quality due to their ability to accumulate agrochemicals. However, these plants may be at significant ecotoxicological risk from pesticides applied in crop fields. The fungicide azoxystrobin (AZX) induces DNA damage and changes in the antioxidant enzymatic system in leaves of the submerged hydrophyte Myriophyllum quitense. In the present study, the objectives were to determine whether AZX induces chromosomal damage in roots of the wetland plant Bidens laevis and to evaluate whether the damage in the antioxidant system was associated with damage in the photosynthetic system. Two experiments were carried out to evaluate the short-term effects (1 or 2 days) of the exposure to different concentrations of the active ingredient of AZX (0, 0.1, 1, 10, 50, 100 µg/L) on intact B. laevis plants. In the first experiment, photosynthetic biomarkers, including chlorophyll a fluorescence, SPAD units, and chlorophyll a and b content, were measured. In the second experiment, the frequency of chromosome aberrations (CA) was evaluated in root tips. In general, the photosynthetic biomarkers evaluated were not affected by AZX, except for a decrease in chlorophyll b content at 100 µg/L. Total CA increased at all AZX concentrations and the most frequent abnormalities were laggards and chromosomes not congregated at the metaphase equator, both indicators of spindle disturbance. This is the first report of AZX-induced chromosomal aberrations in a wetland plant exposed to environmentally relevant concentrations of the fungicide. The reason why AZX exposure had only a limited impact on biomarkers of the photosynthetic apparatus is discussed.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las plantas acuáticas pueden usarse como bioindicadores in situ de la calidad del agua debido a su capacidad de acumular agroquímicos. Sin embargo, estas plantas pueden estar en riesgo ecotoxicológico significativo debido a los plaguicidas aplicados en los campos de cultivo. El fungicida azoxistrobina (AZX) induce daño al ADN y provoca cambios en el sistema enzimático antioxidante en hojas de la hidrófita sumergida Myriophyllum quitense. En este trabajo, nuestros objetivos fueron determinar si la AZX induce daño cromosómico en raíces y evaluar si el daño en el sistema antioxidante se asociaría con daños en el sistema fotosintético en la planta de humedal Bidens laevis. Se llevaron a cabo dos experimentos para evaluar los efectos a corto plazo (1 o 2 días) en plantas intactas de B. laevis expuestas desde la raíz a diferentes concentraciones del ingrediente activo (0, 0.1, 1, 10, 50, 100 &#956;g/L) de AZX. En el primer experimento, se midieron biomarcadores fotosintéticos, que incluyeron fluorescencia de clorofila a, unidades SPAD y contenido de clorofila a y b. En el segundo experimento, se determinó la frecuencia de aberraciones cromosómicas (CA) en ápices de raíz. En general, los biomarcadores fotosintéticos no se vieron afectados por AZX, excepto por una disminución del contenido de clorofila b a 100 &#956;g/L. La frecuencia de CA aumentó en todos los tratamientos con AZX y las anormalidades más frecuentes fueron cromosomas rezagados y cromosomas no congregados, ambos indicadores de alteración del huso mitótico. Éste es el primer informe en el cual AZX induce aberraciones cromosómicas en una planta de humedal expuesta a concentraciones ambientalmente relevantes del fungicida. Se discute la razón por la cual la exposición a AZX tuvo un impacto limitado en los biomarcadores fotosintéticos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[wetland plant]]></kwd>
<kwd lng="en"><![CDATA[strobilurin fungicide]]></kwd>
<kwd lng="en"><![CDATA[cytogenetic biomarkers]]></kwd>
<kwd lng="en"><![CDATA[chlorophylls]]></kwd>
<kwd lng="en"><![CDATA[chlorophyll fluorescence]]></kwd>
<kwd lng="es"><![CDATA[planta de humedal]]></kwd>
<kwd lng="es"><![CDATA[fungicida estrobilurínico]]></kwd>
<kwd lng="es"><![CDATA[biomarcadores citogenéticos]]></kwd>
<kwd lng="es"><![CDATA[clorofilas]]></kwd>
<kwd lng="es"><![CDATA[fluorescencia de clorofila]]></kwd>
</kwd-group>
</article-meta>
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