Intercellular colonization and growth promoting effects of Methylobacterium sp. with plant-growth regulators on rice (Oryza sativa L. Cv CO-43)

Senthilkumar, M.; Madhaiyan, Munusamy; Sundaram, Shanthy; Kannaiyan, S.

doi:10.1016/j.micres.2006.10.007

Cited by 71 publications

(44 citation statements)

References 31 publications

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“…A deleterious effect of inoculation may be associated with a large production of the hormone, which has herbicidal action when in high concentrations (Malik & Sindhu, 2011;Senthilkumara, Madhaiyan, Sundaram & Kannaiyan, 2009 These results open a range of new hypotheses to further studies, for example, the exudation of tryptophan by Sudan grass roots. There are some plants able to produce tryptophan, which under field conditions, could be used by rhizobia in IAA synthesis.…”

Section: Discussionmentioning

confidence: 91%

“…As well, they are capable of synthesizing phyto-stimulating substances, such as auxins (Osório, Gano, Binz, Lima, Martinez, Ramirez, Caballero, de Sá & Giongo, 2014;Ghosh, Kumar & Kanti, 2015), cytokinins (Senthilkumara, Madhaiyan, Sundaram & Kannaiyan, 2009), gibberellin (Miransari & Smith, 2009), ACC deaminase (Nascimento, Brígido, Alho, Glick & Oliveira, 2012), among others. The production of all these phyto-stimulating substances is intrinsically related to an increasing of non-legume crop yield and should be then explored.…”

Section: Introductionmentioning

confidence: 99%

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Inoculation of plant growth promoting rhizobia in Sudan grass (Sorghum × sudanense (Piper) Stapf cv. Sudanense) and millet (Pennisetum glaucum (L.) R.Br. cv. BRS1501)

Machado¹,

Sá²,

Hahn³

et al. 2018

Acta Agron.

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Rhizobia are able to increase yield of non-leguminous species through production of phyto-stimulating substances. This study aimed to evaluate the inoculation effect of rhizobia UFRGS Lc348 and VP16 on millet and Sudan grass yield and germination, and verify the enrichment effect of culture medium with tryptophan, which leads on the rhizobium/plant interaction. Experiments in vitro and greenhouse conditions were conducted. In millet, the inoculation with VP16 grown in culture medium with or without tryptophan induces greater length of hypocotyl and epicotyl under in vitro conditions. UFRGS Lc348 treatment induces longer hypocotyls of millet under in vitro conditions. No effects were observed with the millet inoculation in greenhouse. In Sudan grass, inoculation with VP16 enriched with tryptophan increased dry matter in shoots of adult plants. In millet seedlings had achieved an increasing in elongation in vitro conditions, which could represent an adaptive advantage in the search for water and nutrients in the rhizospheric environment during the initial growth of millet. Similarly, if verified in field conditions, Sudan grass had achieved an increasing in greenhouse conditions with the inoculation of tryptophan-enriched VP16, which could be correlated with a significant gain in crop yield. Therefore, these relationships between tryptophanenriched VP16 and Sudan grass should be verified in subsequent studies under field conditions. Keywords: Biological nitrogen fixation; forage grasses; indole acetic acid (IAA); rhizobacteria; root nodules and symbiont; soil microorganism. ResumenRizobios son capaces de influir en el rendimiento de las especies no leguminosas través de la producción de sustancias fitoestimulantes. El objetivo de este estudio fue el de estudiar el efecto de la inoculación de rizobios UFRGS Lc348 y VP16 sobre la germinación y el rendimiento de millo y pasto Sudán, así como verificar si el enriquecimiento del medio de cultivo con triptófano interfiere en la interacción rizobio/planta. Para este fin se llevaron a cabo experimentos in vitro y bajo condiciones de invernadero. En el experimento con millo en condiciones in vitro, la inoculación con VP16 cultivado en medio enriquecido o no enriquecido con triptófano induce una mayor extensión de hipocótilo y epicótilo. El tratamiento UFRGS Lc348 induce una mayor extensión de hipocótilo en plantas de millo. En plantas adultas de millo no hubo efecto de la inoculación. En pasto Sudán, la inoculación de VP16 enriquecida con triptófano aumentó la masa seca de las plantas adultas. Los aumentos de elongación de plántulas de millo en condiciones in vitro pueden representar una ventaja adaptativa en la búsqueda de agua y nutrientes en el ambiente rizosférico durante el crecimiento inicial del millo. De manera similar, si se verifica en condiciones de campo, el incremento de pasto Sudán observado en condiciones de invernadero con la inoculación de VP16 enriquecido con triptófano, esto puede significar una ganancia significativa en el rendimiento del cultiv...

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Inoculation of plant growth promoting rhizobia in Sudan grass (Sorghum × sudanense (Piper) Stapf cv. Sudanense) and millet (Pennisetum glaucum (L.) R.Br. cv. BRS1501)

Machado¹,

Sá²,

Hahn³

et al. 2018

Acta Agron.

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“…Additionally, some rhizobia are known to produce phyto stimulating substances, such as hormones from the auxin group (Anjum et al, 2011;Spaepen and Vanderleyden, 2011), cytokinins (Senthilkumar et al, 2009) and gibberellins (Erum and Bano, 2008), which are associated with an increase in the yield of legumes and non-legumes. Thus, investment in the rhizobia inoculants that optimize the quality and quantity of pastures offered to cattle that produce milk or meat, may increase the productive performance of the animals.…”

Section: Discussionmentioning

confidence: 99%

Rhizobia isolation and selection for serradella (Ornithopus micranthus) in Southern Brazil

Machado¹,

de²,

Oldra³

et al. 2016

Afr. J. Microbiol. Res.

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Serradella is a plant that belongs to the Fabaceae family, with recognized forage value and has the ability to associate symbiotically with rhizobia. The objective of this study was to isolate, authenticate and select effective rhizobia obtained from native serradella (Ornithopus micranthus) to reduce the need for mineral fertilizer. Nodules, roots of serradella and rhizosphere soil samples were collected in seven municipalities from Rio Grande do Sul and Santa Catarina states. Bacterial colonies were isolated and identified based on morphological characteristics. The authentification and initial selection of rhizobia were conducted in vitro. The most promising strains from the in vitro study were evaluated in a greenhouse experiment for 60 days. Among the 148 bacterial cultures characterized, 113 induced the formation of nodules in serradella while 32 isolate effectively increased fresh mass of plants under in vitro conditions. The strains UFRGS Om57, UFRGS Om59 and UFRGS Om148 formed nodules with greater dry mass and produced high dry mass of plants (shoots and roots) which allowed greater accumulation of N in the shoots.

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“…Seeds were surface-sterilized as described by Senthilkumar et al, (2009). Briefly seeds were surface sterilized with 70% ethanol for 1 min followed by 1% sodium hypochlorite (NaOCl) for 20 min, and washed thoroughly with sterile milli-Q water several times.…”

Section: Surface Sterilization Of Seedsmentioning

confidence: 99%

Isolation and Characterization of Tomato Leaf Phyllosphere Methylobacterium and Their Effect on Plant Growth

Senthilkumar¹,

Krishnamoorthy²

2017

Int.J.Curr.Microbiol.App.Sci

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Intercellular colonization and growth promoting effects of Methylobacterium sp. with plant-growth regulators on rice (Oryza sativa L. Cv CO-43)

Cited by 71 publications

References 31 publications

Inoculation of plant growth promoting rhizobia in Sudan grass (Sorghum × sudanense (Piper) Stapf cv. Sudanense) and millet (Pennisetum glaucum (L.) R.Br. cv. BRS1501)

Inoculation of plant growth promoting rhizobia in Sudan grass (Sorghum × sudanense (Piper) Stapf cv. Sudanense) and millet (Pennisetum glaucum (L.) R.Br. cv. BRS1501)

Rhizobia isolation and selection for serradella (Ornithopus micranthus) in Southern Brazil

Isolation and Characterization of Tomato Leaf Phyllosphere Methylobacterium and Their Effect on Plant Growth

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