Capacidade de solubilização de fosfatos e eficiência simbiótica de rizóbios isolados de solos da Amazônia1

Chagas, Aloísio Freitas; Oliveira, Luiz Antônio de; Oliveira, Arlem Nascimento de; Willerding, André Luiz

doi:10.4025/actasciagron.v32i2.3185

Cited by 15 publications

(16 citation statements)

References 19 publications

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“…Phosphate solubilization is a mechanism common to many microorganisms that are associated with plant roots. This solubilization capacity may be related to the decrease in the pH of the medium due to the production of organic acids (such as gluconic acid, oxalic acid, malonic acid, acetic acid, formic acid, citric acid, and succinic acid), which can dissolve the phosphate mineral, as a result of anion exchange, or chelate ions associated with phosphate (Chagas Junior et al, 2010;Tenga et al, 2019). Acidification of the medium is correlated with phosphorus solubilization by acid phosphatase activity, indicating that some microorganisms have developed enzymes capable of releasing inorganic phosphate from organophosphate complexes, in addition to the activity of this enzyme proving to be a good indicator for the mineralization of organic phosphorus (Kumar, 2016;Tenga et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

Plant Growth-Promoting Bacteria Improve Growth and Modify Essential Oil in Rose (Rosa hybrida L.) cv. Black Prince

Araújo

Brandão

Barguil

et al. 2020

Front. Sustain. Food Syst.

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Rose essential oil is rich in compounds widely used by the pharmaceutical and cosmetic industry, due to the biological activities it presents. However, obtaining oil is costly, as the yield per plant is low, which requires several techniques that aim to increase its production. The application of growth-promoting bacteria has been studied for this purpose. Thus, the objective of this work was to select efficient bacteria for production and evaluate their influence on the phytotechnical characteristics and composition of the essential oils of roses. Seven species of bacteria were evaluated for the potential to promote growth in vitro, being tested for nitrogen fixation, phosphate solubilization, protease production and auxin production. From bacteria tested, four were selected and inoculated on rose plants of cultivar Black Prince to evaluate the influence on phytotechnical variables of flower and stem and the oil production. The evaluation of the production of roses was performed through the characteristics of the flowers (size, weight, and diameter of the stem) and floral bud. The essential oils from the inoculated flowers were extracted and evaluated in terms of content, yield, and chemical composition. The application of B. acidiceler, B. subtilis and B. pumilus resulted in flowers with a diameter up to 29% larger. The floral stem was increased by up to 24.5% when B. acidiceler and B. pumilus were used. Meanwhile, the stem diameter was around 41% greater in the presence of B. acidiceler, B. subtilis and in the control. Bacillus pumilus also increased the weight of fresh petals (104%) and essential oil yield (26%), changing the chemical composition of the extracted essential oil. Thus, it is concluded that B. acidiceler, B. pumilus, and B. subtilis improved the phytotechnical characteristics of roses. Among bacteria, B. pumilus increased the essential oil content as well as positively changed the chemical composition of the extracted essential oil.

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Section: Resultsmentioning

confidence: 99%

Plant Growth-Promoting Bacteria Improve Growth and Modify Essential Oil in Rose (Rosa hybrida L.) cv. Black Prince

Araújo

Brandão

Barguil

et al. 2020

Front. Sustain. Food Syst.

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“…Solubilization halos around the bacterial colonies and their diameters were measured at 72-hour intervals. The solubilization index (SI) was given by equation 1 (Chagas Junior et al, 2010).…”

Section: Mechanisms Of Plant Growth Promotion Of Bacillus Isolates Inmentioning

confidence: 99%

Isolates of Bacillus sp. from garlic: effect on corn development and plant growth-promoting mechanisms

Balbinot¹,

Rodrigues²,

ReginaBotelho³

2020

Revista Brasileira De Ciência Do Solo

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Corn and garlic are important crops to Curitibanos region (state of Santa Catarina-Brazil), often planted in alternate cropping seasons. Production costs are high, especially due to N fertilizer, since they are highly demanding in N. In addition to reducing economic costs, the search for environmentally sustainable technologies has stimulated the study of interactions between plants and growth-promoting microorganisms. Rhizobacteria, e.g., Bacillus sp., have been presenting as growth-promoting microorganisms. Five isolates of garlic rhizosphere from 27 individuals of the Plant Growth Promoting Microorganisms group collection were tested on corn under field conditions, comparing to two levels of nitrogen fertilization: 120 and 60 kg ha-1. The Bacillus collection was also evaluated in vitro for phosphate solubilization, production of IAA (Indole Acetic Acid), extracellular enzymes, and inhibition of Sclerotium cepivorum. For plant height and stalk diameter, the inoculation of the EB16 isolate showed similar results to the fertilization with 120 and 60 kg ha-1 of N in corn. Both EB16 and EB02 isolates increased corn ear diameter and the yield was similar to that observed in the treatment with 60 kg ha-1 of N, indicating their potential as growth-promoters. All strains of the collection produced IAA, and most of them solubilized calcium phosphate and produced lipases and urease. Forty-eight percent of the isolates inhibited S. cepivorum. The EB01, EB15, EB17, and EB27 were positive for three of the four mechanisms analyzed. During these evaluations, it was observed that EB02 and EB16 produced equivalent amounts of IAA, suggesting that more than one growth-promoting mechanism is involved in the efficiency of corn development induction.

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“…As placas foram incubadas a 28 °C por 72h e, em seguida, foi verificada a presença de área solubilizada (capacidade de solubilizar). Para o cálculo do índice de solubilização (IS), foi utilizada a razão entre o diâmetro do halo de solubilização (φHalo) e o diâmetro da colônia bacteriana (ϕColônia) correspondente (IS = ϕ Halo (mm)/ϕ Colônia (mm)) (BERRAQUERO; BAYA; CORMENZANA, 1976;CHAGAS JUNIOR et al, 2010). A partir destes dados, foi obtida a relação entre os diâmetros do halo e da colônia, utilizado na avaliação do potencial de solubilização.…”

Section: Abstract: Endophytic Community Diversity Index Diazotrophiunclassified

Diversidade e potencial de solubilização de fosfato in vitro por bactérias endofíticas associadas à cultura da palma forrageira (Opuntia e Nopalea) em Pernambuco

Silva

Figueirôa

Mergulhão

et al. 2014

PAP

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Capacidade de solubilização de fosfatos e eficiência simbiótica de rizóbios isolados de solos da Amazônia1

Cited by 15 publications

References 19 publications

Plant Growth-Promoting Bacteria Improve Growth and Modify Essential Oil in Rose (Rosa hybrida L.) cv. Black Prince

Plant Growth-Promoting Bacteria Improve Growth and Modify Essential Oil in Rose (Rosa hybrida L.) cv. Black Prince

Isolates of Bacillus sp. from garlic: effect on corn development and plant growth-promoting mechanisms

Diversidade e potencial de solubilização de fosfato in vitro por bactérias endofíticas associadas à cultura da palma forrageira (Opuntia e Nopalea) em Pernambuco

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