<?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>1683-0789</journal-id>
<journal-title><![CDATA[Acta Nova]]></journal-title>
<abbrev-journal-title><![CDATA[RevActaNova.]]></abbrev-journal-title>
<issn>1683-0789</issn>
<publisher>
<publisher-name><![CDATA[Universidad Católica Boliviana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1683-07892022000200430</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación del Riesgo Genotóxico de Aguas Superficiales y Sistemas de Riego Mediante Estudios Ecotoxicológicos Empleando Células de Raices de Allium cepa.]]></article-title>
<article-title xml:lang="en"><![CDATA[Assessment of the Genotoxic Risk of Surface Water and Irrigation Systems by Means of Ecotoxicological Studies Using Allium cepa Root Cells.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ibañez Solano]]></surname>
<given-names><![CDATA[Dyler E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Angulo Reyes]]></surname>
<given-names><![CDATA[M. Rosalva]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Católica Boliviana San Pablo Centro de Investigación de Ingenierías y Ciencias Exactas ]]></institution>
<addr-line><![CDATA[Tarija ]]></addr-line>
<country>Bolivia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2022</year>
</pub-date>
<volume>10</volume>
<numero>4</numero>
<fpage>430</fpage>
<lpage>442</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S1683-07892022000200430&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S1683-07892022000200430&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S1683-07892022000200430&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Poco se sabe sobre el efecto que los contaminantes presentes en cuerpos de agua pueden tener sobre los organismos y los ecosistemas. El empleo de métodos basados en efectos permite evaluar la respuesta de organismos vivos a efluentes y aguas superficiales de composición compleja. El objetivo del estudio fue determinar los efectos fitotóxicos y genotóxicos de aguas superficiales usadas para riego, empleando el protocolo para la evaluación genotóxica en cuerpos de agua con células de raíces de cebollines. Los bulbos fueron expuestos a muestras de aguas del río Camacho (RC), el sistema de riego Guadalquivir-CENAVIT- Calamuchita (GC) y el canal de Riego Calamuchita (CC) en época de estiaje y de lluvias. Se observaron efectos genotóxicos significativos en los bulbos expuestos a muestras de agua de todos los sitios, con leves diferencias entre la estación lluviosa y la seca. En la época de estiaje, el agua de (GC) provocó el mayor porcentaje de micronúcleos (MNC=9,5%) respecto al control (MNC=1,8%), se hipotetiza que el mayor aporte de las aguas residuales de las Lagunas de oxidación de San Luis puede ser la causa. En época de lluvias la frecuencia de micronúcleos del (RC) fueron las más elevadas (MNC=10,2%), respecto del control (MNC=1,5%). Se puede afirmar que existe riesgo genotóxico en todos los sitios evaluados. Para las raíces en época de lluvias, se obtuvo valores de inhibición positivos (hormesis) para las muestras del (RC). En la época de estiaje las diferencias en el crecimiento no fueron estadísticamente significativa en ninguno de los sitios evaluados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Little is known about the effect that pollutants present in surface water have on organisms and ecosystems. The use of Effects-Based Methods allows the assessment of the response of living organisms to effluents and surface waters of complex composition. The main aim was to determine the phytotoxic and genotoxic effects of surface water used for irrigation, using the protocol for genotoxic evaluation in water bodies with onion root cells. The bulbs were exposed to water samples from the Camacho River (RC), the Guadalquivir-CENAVIT- Calamuchita (GC) irrigation system and the Calamuchita Irrigation Canal (CC) during dry and rainy seasons. Significant genotoxic effects were observed in bulbs exposed to water samples from all sites, with slight differences between the rainy and dry seasons. In the dry season, the water from (GC) caused the highest percentage of micronuclei (MNC=9.5%) compared to the control (MNC=1.8%). It is hypothesized that the most significant contribution of wastewater from the treatment plant ponds in San Luis may be the cause. In the rainy season, the frequency of micronuclei of the (RC) was the highest (MNC=10.2%) compared to the control (MNC=1.5%). It can be affirmed that there is a genotoxic risk in all the evaluated sites. Positive inhibition values (hormesis) were obtained for the (RC) samples for the roots in the rainy season. In the dry season, the differences in growth were not statistically significant in any of the evaluated sites.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Río Camacho]]></kwd>
<kwd lng="es"><![CDATA[Sistema de riego Guadalquivir-CENAVIT- Calamuchita]]></kwd>
<kwd lng="es"><![CDATA[genotoxicidad]]></kwd>
<kwd lng="es"><![CDATA[micronúcleos]]></kwd>
<kwd lng="es"><![CDATA[riesgo genotóxico]]></kwd>
<kwd lng="es"><![CDATA[Allium cepa]]></kwd>
<kwd lng="en"><![CDATA[Camacho River]]></kwd>
<kwd lng="en"><![CDATA[Guadalquivir-CENAVIT-Calamuchita irrigation system]]></kwd>
<kwd lng="en"><![CDATA[genotoxicity]]></kwd>
<kwd lng="en"><![CDATA[micronuclei]]></kwd>
<kwd lng="en"><![CDATA[genotoxic risk]]></kwd>
<kwd lng="en"><![CDATA[Allium cepa]]></kwd>
</kwd-group>
</article-meta>
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