<?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>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532018000200541</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2018.2.1620</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Abundance of rhizospheric bacteria and fungi associated with Fouquieria columnaris at Punta Cirio, Sonora, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Abundancia de bacterias y hongos rizosféricos asociados con Fouquieria columnaris en Punta Cirio, Sonora, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Ruacho]]></surname>
<given-names><![CDATA[Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Coronado]]></surname>
<given-names><![CDATA[Martha L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Teyer]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[Aldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Esqueda]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Estatal de Sonora  ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigación Científica de Yucatán, A.C.  ]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Investigación en Alimentación y Desarrollo, A.C.  ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<volume>89</volume>
<numero>2</numero>
<fpage>541</fpage>
<lpage>552</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532018000200541&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532018000200541&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532018000200541&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: A unique relictual population of Fouquieria columnaris is located in Sonora, along a 45-km strip of land encompassing Punta Cirio in the Sonoran Desert. The interaction of plants with microorganisms is an important adaptation to survival in desertic areas. The present study reports the abundance of bacteria, actinobacteria, and filamentous and arbuscular mycorrhizal fungi (AMF) in the rhizosphere of F. columnaris at Punta Cirio. Also, the genetic variability of F. columnaris was analyzed using amplied fragment length polymorphism markers. Bacteria and fungi in 27 soil samples from the rhizosphere of F. columnaris at 3 hills with low, medium, and high elevations were analyzed. The total bacterial, actinobacterial, and filamentous fungal counts did not differ among sites or elevations; no interaction between site and elevation was found. Nitrogen-fixing bacteria varied according to site but not elevation, whereas phosphorus-solubilizing bacteria were undetected. Filamentous fungi were dominated by Aspergillus spp. (48%) and Penicillium spp. (28%), which together represented 76% of the total average colony-forming units. The spore density of AMF ranged from 109 to 245 per 100 g of soil, and 65 to 80% of roots were colonized by hyphae, vesicles, or arbuscles of AMF. The DNA analysis generated an average similarity coefficient of 0.89, which could indicate high genetic homogeneity within the evaluated F. columnaris population.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La única población del relicto Fouquieria columnaris en Sonora se distribuye a lo largo de 45 km en Punta Cirio en el desierto sonorense. La interacción de plantas con microorganismos es una vía importante de sobrevivencia en áreas desérticas. El presente estudio reporta la abundancia de bacterias, actinobacterias, hongos filamentosos y micorrízico arbusculares (HMA) en la rizosfera de F. columnaris en Punta Cirio; asimismo, se analizó la variabilidad genética de F. columnaris mediante marcadores de polimorfismos en la longitud de los fragmentos amplificados. Veintisiete muestras de suelo rizosférico de F. columnaris provenientes de 3 cerros con elevaciones baja, media y alta se analizaron en cuanto a bacterias y hongos. La cuenta total de bacterias, actinobacterias y hongos filamentosos en la rizosfera de F. columnaris no mostró diferencias significativas entre sitios o elevaciones; tampoco se encontró interacción entre sitio y elevación. La cuenta de bacterias fijadoras de nitrógeno varió entre sitios pero no entre elevaciones, mientras que no se detectó la presencia de bacterias solubilizadoras de fósforo. Las especies de Aspergillus (48%) y Penicillium (28%) fueron los hongos filamentosos predominantes, ambos con un 76% del total de unidades formadoras de colonias. La densidad de esporas de HMA varió de 109 a 245 por 100 g de suelo y el porcentaje de raíces colonizadas con hifas, vesículas y arbúsculos de HMA varió de 65 a 80%. El análisis de ADN mostró un coeficiente de similitud promedio de 0.89, lo cual podría indicar una alta homogeneidad genética en esta población de F. columnaris.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Bacteria]]></kwd>
<kwd lng="en"><![CDATA[Actinobacteria]]></kwd>
<kwd lng="en"><![CDATA[Filamentous fungi]]></kwd>
<kwd lng="en"><![CDATA[Mycorrhizae]]></kwd>
<kwd lng="en"><![CDATA[Cirio]]></kwd>
<kwd lng="es"><![CDATA[Bacteria]]></kwd>
<kwd lng="es"><![CDATA[Actinobacteria]]></kwd>
<kwd lng="es"><![CDATA[Hongo filamentoso]]></kwd>
<kwd lng="es"><![CDATA[Micorriza]]></kwd>
<kwd lng="es"><![CDATA[Cirio]]></kwd>
</kwd-group>
</article-meta>
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