<?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>S0188-49992019000400999</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.04.18</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[EVALUATION OF LEAD TOLERANT PLANT GROWTH PROMOTING RHIZOBACTERIA FOR PLANT GROWTH AND PHYTOREMEDIATION IN LEAD CONTAMINATION]]></article-title>
<article-title xml:lang="es"><![CDATA[EVALUACIÓN DEL EFECTO DE RIZOBACTERIAS PROMOTORAS DEL CRECIMIENTO TOLERANTES AL PLOMO EN EL CRECIMIENTO VEGETAL Y LA FITORREMEDIACIÓN EN CONTAMINACIÓN POR PLOMO]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saleem]]></surname>
<given-names><![CDATA[Muhammad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Asghar]]></surname>
<given-names><![CDATA[Hafiz Naeem]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zahir]]></surname>
<given-names><![CDATA[Zahir Ahmad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Shahid]]></surname>
<given-names><![CDATA[Muhammad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Agriculture Institute of Soil and Environmental Sciences ]]></institution>
<addr-line><![CDATA[Faisalabad ]]></addr-line>
<country>Pakistan</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of Agriculture Department of Chemistry and Biochemistry ]]></institution>
<addr-line><![CDATA[Faisalabad ]]></addr-line>
<country>Pakistan</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>4</numero>
<fpage>999</fpage>
<lpage>1009</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000400999&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000400999&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000400999&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The present study was conducted to evaluate five pre-characterized lead tolerant plant growth promoting rhizobacteria: Pseudomonas gessardii strain BLP141 (S2), Pseudomonas fluorescens A50 (S5), Pseudomonas syringae pv. syringae B728a (S6), Pseudomonas stutzeri strain 28a24 (S8) and Pseudomonas fluorescens strain LMG 2189 (S10), for their plant growth promotion, phytoremediation potential and physiological response on Helianthus annuus L. as test crop, exposed to different lead concentrations (300, 600 and 900 mg/kg). Crop was harvested after 30 days of sowing and data regarding growth parameters (root shoot length, root shoot fresh and dry weights), physiological attributes (photosynthetic rate, transpiration rate and substomatal CO2), and lead content in root and shoot of sunflower, were recorded. Results revealed that lead contamination decreased the growth and physiological attributes of plants at all levels of lead stress; however inoculation with lead tolerant rhizobacteria reversed the toxic effect of lead on the plants and improved the growth and physiological attributes of sunflower in lead contamination, as compared to plants grown in the un-inoculated lead contaminated treatments. Among the five isolates, S2, S5 and S10 promoted more growth, improving the physiological attributes and phytoremediation potential of plants at all levels of contamination as compared to plants grown in lead stress without inoculation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se evaluaron cinco rizobacterias promotoras del crecimiento tolerantes al plomo precaracterizadas: Pseudomonas gessardii cepa BLP141 (S2), Pseudomonas fluorescens A50 (S5), Pseudomonas syringae pv. syringae B728a (S6), Pseudomonas stutzeri cepa 28a24 (S8) y Pseudomonas fluorescens cepa LMG 2189 (S10), con relación a su efecto en el crecimiento, potencial de fitorremediación y respuesta fisiológica en Helianthus annuus L. como cultivo de ensayo expuesto a diferentes concentraciones de plomo (300, 600 y 900 mg/kg). El cultivo se cosechó después de 30 días de sembrado y se registraron los datos referentes a parámetros de crecmiento (longitud del brote y la raíz, peso fresco y seco del brote y la raíz), atributos fisiológicos (tasa fotosintética y de transpiración, CO2 estomático) y contenido de plomo en raíces y brotes de girasol. Los resultados indican que la contaminación por plomo mermó tanto el desarrollo como los atributos fisiológicos de las plantas en todos los niveles de agresión por plomo; sin embargo, la inoculación con rizobacterias tolerantes al plomo revirtió los efectos tóxicos y mejoró tanto el crecimiento como los atributos fisiológicos del girasol contaminado por este metal, en comparación con plantas cultivadas sin este tratamiento. De las cinco cepas aisladas, S2, S5 y S10 promovieron mayor crecimiento y mejoraron en mayor medida los atributos fisiológicos y el potencial de fitorremediación de las plantas en todos los niveles de contaminación en comparación de plantas cultivadas en un ambiente de agresión por plomo sin inoculación.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[contamination]]></kwd>
<kwd lng="en"><![CDATA[heavy metals]]></kwd>
<kwd lng="en"><![CDATA[plant growth promoting rhizobacteria]]></kwd>
<kwd lng="en"><![CDATA[plant physiology]]></kwd>
<kwd lng="en"><![CDATA[sunflower]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[metales pesados]]></kwd>
<kwd lng="es"><![CDATA[rizobacterias promotoras del crecimiento]]></kwd>
<kwd lng="es"><![CDATA[fisiología vegetal]]></kwd>
<kwd lng="es"><![CDATA[girasol]]></kwd>
</kwd-group>
</article-meta>
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