Influência da inoculação de rizóbios sobre a germinação e o vigor de plântulas de alface

Schlindwein, Gilson; Vargas, Luciano Kayser; Lisboa, Bruno Brito; Azambuja, Augusto Cruz de; Granada, Camille Eichelberger; Gabiatti, Naiana Cristine; Prates, Felipe; Stumpf, Raquel

doi:10.1590/s0103-84782008000300010

Cited by 47 publications

(33 citation statements)

References 14 publications

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“…Even though final germination rates were unaffected by rhizobial inoculation, the increase in initial germination rates promoted by those eight isolates led to an associated increase in the germination speed index. Earlier germination in bacterized seeds was also reported by Biswas et al (2000b), Gupta et al (2002), Pandey et al (2005) and Schlindwein et al (2008), and is an important factor for crop establishment. The increase in seedlings vigor is an important aspect in rice crops, because it may result in earlier seedling emergence, allowing rice seedlings to overcome weed competition (Gibson et al, 2002).…”

Section: Resultssupporting

confidence: 53%

“…Indoleacetic acid production is frequently pointed out as one of the main mechanisms of plant growth promotion (Biswas et al, 2000a;Khalid et al, 2004;Chi et al, 2005;Lee et al, 2006). However, this positive effect depends on the amount of IAA produced by the bacterium, since an IAA overproduction is considered deleterious to plants (Barazani & Friedman, 1999;Ahmad et al, 2005;Schlindwein et al, 2008). Similarly to other phytohormones, IAA exerts a stimulatory effect on plant growth within a narrow concentration range only, outside of which the plant is either unresponsive or its growth is inhibited (Biswas et al, 2000b).…”

Section: Resultsmentioning

confidence: 99%

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Occurrence of plant growth-promoting traits in clover-nodulating rhizobia strains isolated from different soils in Rio Grande do Sul state

Vargas

Lisboa

Schlindwein

et al. 2009

Rev. Bras. Ciênc. Solo

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SUMMARYIn the last decades, the use of plant growth-promoting rhizobacteria has become an alternative to improve crop production. Rhizobium leguminosarum biovar trifolii is one of the most promising rhizobacteria and is even used with nonlegume plants. This study investigated in vitro the occurrence of plant growthpromoting characteristics in several indigenous R. leguminosarum biovar trifolii isolated from soils in the State of Rio Grande do Sul, Brazil. Isolates were obtained at 11 locations and evaluated for indoleacetic acid and siderophore production and inorganic phosphate solubilization. Ten isolates were also molecularly characterized and tested for antagonism against a phytopathogenic fungus and for plant growth promotion of rice seedlings. Of a total of 252 isolates, 59 produced indoleacetic acid, 20 produced siderophores and 107 solubilized phosphate. Some degree of antagonism against Verticillium sp. was observed in all tested isolates, reducing mycelial growth in culture broth. Isolate AGR-3 stood out for increasing root length of rice seedlings, while isolate ELD-18, besides increasing root length in comparison to the uninoculated control, also increased the germination speed index, shoot length, and seedling dry weight. These results confirm the potential of some strains of R. leguminosarum biovar trifolii as plant growth-promoting rhizobacteria.Index terms: rhizobacteria, siderophore, indoleacetic acid, phosphate solubilization, antagonism, rice.(

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Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Occurrence of plant growth-promoting traits in clover-nodulating rhizobia strains isolated from different soils in Rio Grande do Sul state

Vargas

Lisboa

Schlindwein

et al. 2009

Rev. Bras. Ciênc. Solo

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“…In addition to the contribution of rhizobia to biological N fixation, it is known that these microorganisms act as plant growth promoters and are involved in actions such as phosphate solubilization (Marra et al, 2012), production of siderophores (Jin et al, 2006), and production of phytohormones (Schlindwein et al, 2008), among other effects, all mechanisms that facilitate establishment of plants in degraded environments. This may be the explanation for the growth stimulation promoted by isolates UFSC-B5 and M8 in maricá, where even with low nodulation percentages there was considerable plant growth.…”

Section: Resultsmentioning

confidence: 99%

Rhizobia Isolated from Coal Mining Areas in the Nodulation and Growth of Leguminous Trees

Moura

Armas

Meyer

et al. 2016

Rev. Bras. Ciênc. Solo

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An alternative for recovery of areas degraded by coal mining is revegetation with rapidly growing leguminous trees, which often do not establish in low fertility soils. The objective of this study was to evaluate the efficiency of native rhizobia isolated from coal mining areas in the nodulation and growth of leguminous trees. We isolated 19 strains of rhizobia from a degraded soil near Criciúma, SC, Brazil, and evaluated the nodulation and growth-promoting capacity of the inoculated isolates for bracatinga (Mimosa scabrella), maricá (M. bimucronata) and angico-vermelho (Parapiptadenia rigida). Isolates UFSC-B2, B6, B8, B9, B11 and B16 were able to nodulate bracatinga, providing average increases of 165 % in shoot dry matter, with a significant contribution to N accumulation. Isolates UFSC-B5, B12, and M8 favored nodulation and growth of maricá, especially isolate UFSC-B12, which promoted increases of 370 % in N accumulation compared to treatment with N fertilizer. All strains were inefficient in promoting growth and N uptake by angico-vermelho. In conclusion, isolation and use of selected rhizobia for bracatinga and maricá plant inoculation can contribute to the growth and accumulation of N, with prospects for use in programs for revegetation of degraded soils in coal mining areas.

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“…Miransari and Smith (2014) pointed out that ethylene and gibberellins affect radicle growth, with gibberellins being the most important hormone. High concentrations of the auxine (IAA) could also be responsible for the lower radicle growth induced by Pf (24) and this effect has been previously reported (Schlindwein et al, 2008). Fargasová (1994) suggested that auxins in general possess herbicide action (at specific concentration ranges) and this could possibly be involved in the adverse effect observed on germination parameters.…”

Section: Effect Of Rhizobacteria Inoculation On Lettuce Seeds Germinamentioning

confidence: 87%

Rhizobacteria Pseudomonas fluorescens and Azospirillum sp. association enhances growth of Lactuca sativa L. under tropical conditions

Aponte

Castillo

Cabrera

et al. 2017

j. cent. eur. agric.

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The selection of microorganisms that enhance plant growth and confer biotic and abiotic tolerance to crops constitutes a biotechnology currently gaining importance on a global scale. The aim of this investigation was to evaluate the effects of inoculating rhizobacteria to lettuce (Lactuca sativa L.) on seed germination and vegetative development in order to use isolates as potential biofertilizers under tropical conditions. Five isolates of Pseudomonas fluorescens (Pf) and one of Azospirillum sp. (Az) were inoculated to seeds using a bacterial suspension of 1.5*10 8 CFU*mL -1 . In vitro, none of the isolates promoted germination. In vivo, isolates promoted growth and acted as stress alleviators by conferring tolerance to high temperatures (≥ 30 °C). The highest seedling emergence percentages were induced by the association of P.fluorescens with Azospirillum. This association also promoted the highest leaf-area in 25 d seedlings and exhibited a significantly higher dry-weight in 40 d plants compared to the control (P≤0.05) supporting the advantages of bio-consortiums over individual strains. The strains were able to produce dependent L-tryptophan indole-3-acetic acid (IAA), to solubilize phosphorous in vitro and tolerated at least 5%-salt stress. The results indicate that isolate Pf (26) and Az possess plant growth promoting rhizobacteria (PGPR) traits and should be further assessed. This study suggests that P. fluorescens and Azospirillum act synergically and are able to trigger an induced-tolerance mechanism in lettuce under abiotic stress.

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Influência da inoculação de rizóbios sobre a germinação e o vigor de plântulas de alface

Cited by 47 publications

References 14 publications

Occurrence of plant growth-promoting traits in clover-nodulating rhizobia strains isolated from different soils in Rio Grande do Sul state

Occurrence of plant growth-promoting traits in clover-nodulating rhizobia strains isolated from different soils in Rio Grande do Sul state

Rhizobia Isolated from Coal Mining Areas in the Nodulation and Growth of Leguminous Trees

Rhizobacteria Pseudomonas fluorescens and Azospirillum sp. association enhances growth of Lactuca sativa L. under tropical conditions

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