2012
DOI: 10.5897/ajmrx11.019
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A review on the role of Azospirillum in the yield improvement of non leguminous crops

Abstract: Rise in human population always demands a rapid and sustainable increase in cereal production. As a result nitrogenous fertilizers were used constantly in excess, which resulted in a number of problems such as green house emissions (particularly N 2 O) and leaching to groundwater. Moreover they are expensive. So long term sustainability in agriculture can only be obtained with the use of low cost fertilizer which should also be ecologically safe. In this regard biological nitrogen fixation by microbes, that is… Show more

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Cited by 25 publications
(7 citation statements)
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References 181 publications
(215 reference statements)
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“…Azospirillum have the ability to fix atmospheric nitrogen and also mineralize nutrients from the soil, sequester iron, withstand harsh environmental conditions, and promote beneficial associations between mycorrhizal fungi and plants. Moreover, Azospirillum plays a role in mitigating the adverse impacts of abiotic stresses on plants [23]. The presence of Azospirillum population was observed to be notably greater in the organically managed field in both surface and subsurface soils.…”
Section: Discussionmentioning
confidence: 95%
“…Azospirillum have the ability to fix atmospheric nitrogen and also mineralize nutrients from the soil, sequester iron, withstand harsh environmental conditions, and promote beneficial associations between mycorrhizal fungi and plants. Moreover, Azospirillum plays a role in mitigating the adverse impacts of abiotic stresses on plants [23]. The presence of Azospirillum population was observed to be notably greater in the organically managed field in both surface and subsurface soils.…”
Section: Discussionmentioning
confidence: 95%
“…Outro efeito notável após a inoculação de plantas com a bactéria diazotrófica Azospirillum brasilense é a formação de raízes com maior número e densidade de pêlos radiculares. Dessa forma, as plantas conseguem absorver água e nutrientes com maior eficiência, refletindo, assim, no maior desenvolvimento vegetal (SAIKIA et al, 2012).…”
Section: Introductionunclassified
“…Aquí se da lugar a mecanismos de fijación de nitrógeno atmosférico, absorción iónica de hierro, zinc y otros micronutrientes esenciales, solubilización y absorción de fosfatos, producción de fitohormonas como auxinas, giberelinas, citoquininas, modulación del crecimiento vegetal mediante la enzima desaminasa del ácido 1-aminociclopropano-1carboxílico (ACC) y compuestos de elicasas (Bakker et al, 2007;Hayat et al, 2010). Su estudio con fines agrícolas ha ido incrementándose en las últimas dos décadas, uno de los puntos a favor de las PGPR por encima de los fertilizantes químicos, es la inexistencia de impactos ambientales que produce su uso en el campo, a diferencia de los segundos que, si poseen un impacto potencial sobre el ambiente, debido a la liberación de gases de efecto invernadero (N2O), reducción de la capa de ozono, calentamiento global y lluvia acida como consecuentes de su uso extensivo (Maheshwari, 2010;Sivasakthi et al, 2014;Saikia et al, 2012). Algunos de los géneros de PGPR principalmente estudiados son: Rhizobium, Azospirillum, Azotobacter, Serratia, Klebsiella, Beijerinckii, Pseudomonas, Bacillus, Burkolderia, Anabena, Nostoc, y Arthrobacter (Riveros, 2010).…”
Section: Bacterias Promotoras De Crecimiento Vegetalunclassified
“…Las cepas del género Azospirillum tienen una morfología vibroide ligeramente curvada o recta de aproximadamente 1.0 µm de diámetro y 2.1-3.8 µm de longitud, son bacterias diazótrofas de vida libre (Saikia et al, 2012) su capacidad de promover el crecimiento de las plantas recae principalmente por su capacidad de producir fitohormonas (Bashan et al, 2004). Las investigaciones sobre este género han demostrado la producción de fitohormonas y moléculas como el ácido indol-3-acetico (AIA) giberilinas (GA), ácido abscícico (ABA), citoquininas, óxido nítrico, nitrato reductasa y etileno, responsables de disminuir el estrés ambiental, aumentar la biodisponibilidad y absorción de minerales y mejorar la arquitectura de la raíz (Bashan y De-Bashan, 2010).…”
Section: Azospirillumunclassified
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