Isolamento e seleção de rizobactérias promotoras do crescimento de Pinus taeda

Brunetta, Juliana Margarido Fonseca Couto; Alfenas, Acelino C.; Máfia, Reginaldo Gonçalves; Gomes, José Mauro; Binoti, Daniel Breda; Fonseca, Nilva Aparecida Nicolao

doi:10.1590/s0100-67622010000300003

Cited by 11 publications

(14 citation statements)

References 19 publications

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“…Although the microbial activity has been different if compared to the substrate (d) with (i) and (k), possibly in (d) time and (i) and (k), the number and type of microorganisms can positively influence the quality of the root system. Brunetta et al (2007) verified from the 99 tested strains of P. taeda, six (UFV AL9, UFV-AM5, UFV-AM2, UFV-F3, UFV-G2 and UFV-G4) stood out due to their capacity of stimulating the growth and quality improvement seedlings. Significant differences were not observed between the control and the other tested strains.…”

Section: Figmentioning

confidence: 98%

Rooting responses of black pepper (Piper nigrum cv. Bragantina) as affected by chemical, physical and microbiological properties of substrates and auxin

Freire¹,

Schmildt²,

Lopes³

et al. 2017

Aust J Crop Sci

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The quality of the root system in stem cuttings of Piper nigrum is highly associated with the induction of adventitious roots by means of auxins and type of substrates. The objective of this study was to evaluate the rooting of P. nigrum cv. Bragantina cuttings treated or not with indole-3-butyric acid (IBA) in different substrates. The experiment was conducted in a randomized block design following a factorial 2 x 11 scheme (IBA -0 and 4000 mg kg -1 in talc and 11 substrates), with four repetitions of 16 cuttings each. The auxin increased rooting and improved the quality of the root system. The substrates evaluated presented diverse physical, chemical and microbiological characteristics, interfering significantly in the rooting responses. Substrates (d) -soil + limestone + single superphosphate + potassium chloride + chicken manure and (i) -soil + coffee straw + limestone + single superphosphate are the ones recommended for rooting of pepper cv. Bragantina.

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Section: Figmentioning

confidence: 98%

Rooting responses of black pepper (Piper nigrum cv. Bragantina) as affected by chemical, physical and microbiological properties of substrates and auxin

Freire¹,

Schmildt²,

Lopes³

et al. 2017

Aust J Crop Sci

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“…In Brazil, there are only two published studies to date on this topic (Brunetta et al, 2007(Brunetta et al, , 2010. Data indicate that Pinus taeda L. seedlings inoculated with Bacillus strains were up to 3.5 centimeters taller than control plants.…”

Section: Introductionmentioning

confidence: 99%

Inoculation of Pinus taeda Seedlings with Plant Growth-promoting Rhizobacteria

et al. 2018

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The aim of this study was to evaluate the effect of Azospirillum brasilense, Bacillus subtilis and Pseudomonas fluorescens on the growth of Pinus taeda seedlings. Bacterial inoculants were applied in two different forms: at sowing and 20 days after emergence. At 30, 60 and 90 days after emergence, we evaluated plant height and root-colar diameter. At 180 days after emergence, we also measured shoot and root dry weight. Data were analyzed by analysis of variance and means were ranked by Duncan's test. The most pronounced results were observed for root and shoot biomass when plants were inoculated with Bacillus subtilis and Pseudomonas fluorescens. Bacillus subtilis increased root and shoot biomass by 67.1% and 33.1%, respectively, when comparing values with those of non-inoculated plants. On the other hand, inoculation with Pseudomonas fluorescens decreased root biomass up to 31.42%. Inoculation with Azospirillum brasilense did not promote any difference in Pinus taeda seedling growth and may not be an efficient alternative for inoculation practices. According to these results, inoculation of Pinus taeda seedlings with Bacillus subtilis has great potential to improve plant growth regarding adaptation to field conditions.

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“…These bacteria can also produce plant hormones, such as Indole-Acetic Acid (IAA) (SANCHEZ LÓPEZ et al, 2014;ANGURO et al, 2014;CATTELAN, 1999). The conversion of tryptophan to IAA is a mechanism performed by several PGPR, since it contributes to the reduction of the excess of this amino acid in the rhizosphere, which can be deleterious to bacterial cells (BRUNETTA et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

ISOLATION AND CHARACTERIZATION OF PLANT GROWTH PROMOTING BACTERIA ISOLATED FROM GARLIC (allium sativum).

Botelho¹,

Leoncio

2017

RSA

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-Garlic has great economic and social importance in Santa Catarina. It is a demanding crop in nutrients, being necessary high amount of chemical fertilizers, increasing the cost of production and the environmental impact. An alternative to the use of inputs are Rizobacteria Promoting Plant Growth (RPCP). Among the RPCPs, the most studied genera are Azospirillum, Bacillus and Pseudomonas of the fluorescent group that have shown benefits for the growth of several plant species. In this context, isolates of RPCP obtained from the rhizosphere of garlic maintained in protected cultivation were phenotypically and genotypically characterized and a growth promotion test in vivo was carried out, in protected cultivation. The biochemical tests used for phenotypic characterization were glucose and sucrose fermentation, Methyl Red (MR), catalase production and urea hydrolysis. The potential of plant growth induction was also evaluated by analyzing the production capacity of IAA (Indol-Acetic Acid) and calcium phosphate solubilization in vitro. Twenty-seven isolates were obtained. For the biochemical tests, 21 isolates were able to ferment glucose and 26, sucrose. For the other tests, all isolates showed a positive reaction. As for the mechanisms of plant growth promotion, 81.5% and 66.6% of the isolates presented IAA production and phosphate solubilizing capacity, respectively. The in vivo growth promotion test using maize (Zea mays) as a model indicated that the tested isolates (EB02, EB16, EB14, EB26, EB23) showed similarity to the treatment with 100% recommended nitrogen fertilization. The isolates were identified by sequencing the 16S rRNA gene. Fourteen isolates (51, 85% of the collection) were identified as Bacillus subtillis, including those tested in planta. These microorganisms present potential for the promotion of plant growth.Key words: growth promotion, rizobacteria, liliacea, corn.Resumo -O alho possui grande importância econômica e social em Santa Catarina. É um cultivo exigente em nutrientes, sendo necessária elevada quantidade de fertilizantes químicos, incrementando o custo de produção e o impacto ambiental. Uma alternativa ao uso de insumos são as Rizobactérias Promotoras de Crescimento de Plantas (RPCP). Dentre as RPCPs, os gêneros mais estudados são Azospirillum, Bacillus e Pseudomonas do grupo fluorescente que têm demonstrado benefícios para o crescimento de várias espécies vegetais. Neste contexto, foram caracterizados, fenotípica e genotipicamente, isolados de RPCP obtidos da rizosfera de alho mantido em cultivo protegido e realizado teste de promoção de crescimento in vivo, também em cultivo protegido. Os testes bioquímicos utilizados para caracterização fenotípica foram fermentação de glicose e sacarose, Vermelho de Metila (VM), produção de catalase e hidrólise da ureia. Também foi avaliado o potencial de indução do crescimento vegetal, mediante análise da capacidade de produção de AIA (Ácido Indol-Acético) e de solubilização de fosfatos de cálcio in vitro. Foram obtidos 27 isolados. Para ...

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Isolamento e seleção de rizobactérias promotoras do crescimento de Pinus taeda

Cited by 11 publications

References 19 publications

Rooting responses of black pepper (Piper nigrum cv. Bragantina) as affected by chemical, physical and microbiological properties of substrates and auxin

Rooting responses of black pepper (Piper nigrum cv. Bragantina) as affected by chemical, physical and microbiological properties of substrates and auxin

Inoculation of Pinus taeda Seedlings with Plant Growth-promoting Rhizobacteria

ISOLATION AND CHARACTERIZATION OF PLANT GROWTH PROMOTING BACTERIA ISOLATED FROM GARLIC (allium sativum).

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