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Effect of plant growth-promoting rhizobacteria (PGPR) associated to Pennisetum clandestinum in the altiplano cundiboyacense

Efecto de bacterias promotoras de crecimiento vegetal (PGPR) asociadas a Pennisetum clandestinum en el altiplano cundiboyacense

dc.creatorCriollo, Paola Jimena
dc.creatorObando, Melissa
dc.creatorSánchez, Leonardo
dc.creatorBonilla, Ruth
dc.date2013-01-17
dc.date.accessioned2020-08-04T20:35:33Z
dc.date.available2020-08-04T20:35:33Z
dc.identifierhttp://revista.corpoica.org.co/index.php/revista/article/view/254
dc.identifier10.21930/rcta.vol13_num2_art:254
dc.identifier.urihttp://test.repositoriodigital.com:8080/handle/123456789/4535
dc.descriptionPennisetum clandestinum (kikuyo) is a common pasture in the altiplano cundiboyacense silvopastoral systems, which possesses high nutritional value. Therefore, studies to improve the production process in both economic and environmental terms are very important. The role of inoculation with plant growthpromoting bacteria was evaluated on the growth of kikuyu grass. The 4K and 5B strains were identified, through amplification and analysis of their 16S rDNA, as members of the Stenotrophomonas and Pseudomonas genera, respectively. They were characterized in vitro for their efficiency of biological nitrogen fixation, production of indole compounds, and phosphate solubilization. Four treatments were evaluated under greenhouse conditions. Furthermore, the biomass was evaluated at different stages of the plant (70, 100 and 130 days). The 4K strain demonstrated a root dry weight that increased by 50% at 70 and 100 days and the 5B strain showed a statistically significant behavior for plant and root dry weight with an increase of 50% at 130 days. The most important effect was presented after 100 d where treatments, TQ, TB1 and TB2, exceeded more 80% to absolute control in the fresh weight of the air. These results showed that inoculation with PGPR represents a biotechnological alternative to promote growth of P. clandestinum, as we observed relevant effects on biomass production 100 days after planting.  en-US
dc.descriptionPennisetum clandestinum (kikuyo) es una pastura común en  los sistemas silvopastoriles del altiplano cundiboyacense,  con altas propiedades nutritivas. Por tanto estudios que  permitan mejorar el proceso de producción en términos  económicos y ambientales reviste gran importancia.  En este estudio se evaluó el papel de la inoculación con  bacterias promotoras de crecimiento vegetal (PGPR)  sobre el crecimiento de pasto kikuyo. Las cepas 4K y 5B  fueron identificadas mediante amplificación y análisis  del 16S rADN, como Stenotrophomona ssp. y Pseudomona  ssp., respectivamente, caracterizadas por su eficiencia  in vitro en la fijación biológica de nitrógeno, producción  de compuestos indólicos y solubilización de fosfatos. Se  evaluaron las cepas en condiciones de invernadero en tres  tiempos de crecimiento de la planta (70, 100 y 130 días). Se  evidenció que la cepa 4K incrementó el peso seco radicular  de la planta en 50% a los 70 y 100 días, mientras que la  cepa 5B mostró un comportamiento similar en el peso seco  aéreo y radicular con aumentos de hasta el 50% a los 130  d. El efecto más importante se presentó después de 100 d  donde los tratamientos TQ, TB1 y TB2, superaron en más  del 80% al testigo absoluto en el peso fresco de la parte  aérea. Estos resultados demostraron que la inoculación  de PGPR representa una alternativa biotecnológica para  promover el crecimiento de P. clandestinum, con efectos  relevantes en producción de biomasa 100 días después de  la siembra (dds).    es-ES
dc.formatapplication/pdf
dc.languagespa
dc.publisherCorporación Colombiana de Investigación Agropecuaria (Agrosavia)es-ES
dc.relationhttp://revista.corpoica.org.co/index.php/revista/article/view/254/257
dc.sourceCiencia y Tecnología Agropecuaria; Vol. 13 No. 2 (2012); 189-195en-US
dc.sourceCiencia & Tecnología Agropecuaria; Vol. 13 Núm. 2 (2012); 189-195es-ES
dc.sourcerevista Corpoica Ciência e Tecnologia Agropecuária; v. 13 n. 2 (2012); 189-195pt-BR
dc.source2500-5308
dc.source0122-8706
dc.source10.21930/rcta.vol13-num2
dc.subjectsilvopastoral systemen-US
dc.subjectgrassesen-US
dc.subjectbiological nitrogen fixationen-US
dc.subjectindolic compoundsen-US
dc.subjectphosphate solubilizationen-US
dc.subjectSistemas Silvopastorileses-ES
dc.subjectGramíneases-ES
dc.subjectFijación Biológica De Nitrógenoes-ES
dc.subjectCompuestos Indólicoses-ES
dc.subjectSolubilización De Fosfatoes-ES
dc.titleEffect of plant growth-promoting rhizobacteria (PGPR) associated to Pennisetum clandestinum in the altiplano cundiboyacenseen-US
dc.titleEfecto de bacterias promotoras de crecimiento vegetal (PGPR) asociadas a Pennisetum clandestinum en el altiplano cundiboyacensees-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
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