The ability of a new strain of Bacillus pseudomycoides to improve the germination of alfalfa seeds in the presence of fungal infection or chromium

Knežević, Magdalena; Stajković-Srbinović, Olivera; Assel, Maibassova; Milić, Marija; Mihajlovski, Katarina; Delić, Dušica; Buntić, Aneta

doi:10.1016/j.rhisph.2021.100353

Cited by 15 publications

(10 citation statements)

References 41 publications

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“…Improving seedling growth may be related to the ability of B1 strain to produces IAA, siderophores and to solubilise phosphate. Several studies have shown that bacteria with these PGP traits could enhance seedling growth (Knežević et al 2021;Pandey and Gupta, 2020). The agrochemical characteristic of experimental soil and biomass ash are presented in Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…The Bacillus isolates used had a stimulating effect on barley growth and increased the barley shoot dry weight. This is probably associated with the production of plant growth promoting substances by the isolates (Knežević et al 2021;Cakmakci et al 2007). In all treatments, the amount of P2O5 and K2O in the dry mass of barley shoot increased in comparison with the controls.…”

Section: Resultsmentioning

confidence: 99%

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Synergistic effect of Bacillus isolates and biomass ash on soil and plant quality: A preliminary potexperiment with the analysis of potentially toxic elements

Buntić¹,

Jojević-Tošić²,

Knežević³

et al. 2021

Zemljište i biljka

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The use of biomass ash in agriculture can have advantages such as improved soil quality and environmentally friendly ash disposal. Moreover, in combination with microbial inoculants, biomass ash can have a beneficial effect on plant growth. The study investigated the effect of biomass ash and inoculums of three Bacillus isolates on the quality of soil and barley plants. The greenhouse pot experiment included five treatments and two control soils: control - without any amendment and control with mineral fertilizer (CAN). Treatments included soil (3 kg/pot) and biomass ash (30 g/pot) with and without calcium ammonium nitrate or with bacterial inoculum. Biomass ash was collected after combustion of soybean straw. Bacillus sp. were isolated from the rhizosphere soil of alfalfa. The presence of PGP traits (Indole-3-Acetic Acid and siderophores) was confirmed by the quantitative tests for the three Bacillus isolates used (B1, BS1, BMG1). The ash, soil and plant (collected in crop maturity stage) samples were tested for: total N, C, S, and plant available P2O5 and K2O as well as for the content of potentially toxic and hazardous microelements (As, Cd, So, Cr, Cu, Mn, Ni, Pb, Zn). Inoculation of seeds with Bacillus inoculums (in vitro) showed a significant effect on seedling growth compared to the non-inoculated control. Addition of ash significantly reduced soil acidity and increased content of plant available P and K compared to the controls, while combination of ash and microorganism, increased amount of available P compared to the treatment with ash only. Barley biomass yield was increased more than double when treated with ash and by 87.62% when treated with ash+BMG1 compared to control. The lowest yield was obtained in the treatment where only CAN was added. The content of potentially toxic microelements in the soil and barley shoots was below the maximum allowed concentrations. The use of biomass ash alone was effective in terms of soil nutritional and physical properties resulting in yield increase. However, the use of ash in combination with Bacillus isolates in addition to positive effect on soil and plant quality resulted in a higher barley biomass than the combination of ash with CAN. This study showed that biomass ash can be used as fertilizer on acidic soils with low nutrient content alone or in combination with bacterial inoculants. The synergistic effect of ash with microorganisms can provide an environmentally friendly approach in agriculture to reduce the need for chemical fertilizers and solve the problem of biomass ash disposal.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synergistic effect of Bacillus isolates and biomass ash on soil and plant quality: A preliminary potexperiment with the analysis of potentially toxic elements

Buntić¹,

Jojević-Tošić²,

Knežević³

et al. 2021

Zemljište i biljka

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“…In another experiment, Glomus mosseae and Rhizobium ( Sinorhizobium medicae ) combined effects on the root rot caused by Microdochium tabacinum have significantly reduced root rot besides helping alfalfa to uptake water and nutrients, specifically phosphorus ( Gao et al, 2018a ). Bacterial BCAs, Bacillus spp., Pseudomonas spp., and Actinomycetes are also widely used to manage alfalfa root rot ( Xiao et al, 2002 ; Knezevic et al, 2021 ). In 2009, about 91 actinomycetes were isolated from 10 soil samples in Chifeng Inner Mongolia through the gradient dilution separation method.…”

Section: Management Strategiesmentioning

confidence: 99%

Root rot a silent alfalfa killer in China: Distribution, fungal, and oomycete pathogens, impact of climatic factors and its management

et al. 2022

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Alfalfa plays a significant role in the pasture ecosystems of China’s north, northeast, and northwest regions. It is an excellent forage for livestock, improves soil structure, prevents soil erosion, and has ecological benefits. Presently root rot is a significant threat to the alfalfa productivity because of the survival of the pathogens as soil-borne and because of lack of microbial competition in the impoverished nutrient-deficient soils and resistant cultivars. Furthermore, these regions’ extreme ecological and environmental conditions predispose alfalfa to root rot. Moisture and temperature, in particular, have a considerable impact on the severity of root rot. Pathogens such as Fusarium spp. and Rhizoctonia solani are predominant, frequently isolated, and of major concern. These pathogens work together as disease complexes, so finding a host genotype resistant to disease complexes is challenging. Approaches to root rot control in these regions include mostly fungicides treatments and cultural practices and very few reports on the usage of biological control agents. As seed treatment, fungicides such as carbendazim are frequently used to combat root rot; however, resistance to fungicides has arisen. However, breeding and transgenic approaches could be more efficient and sustainable long-term control strategies, especially if resistance to disease complexes may be identified. Yet, research in China is mainly limited to field investigation of root rot and disease resistance evaluation. In this review, we describe climatic conditions of pastoral regions and the role of alfalfa therein and challenges of root rot, the distribution of root rot in the world and China, and the impact of root rot pathogens on alfalfa in particular R. solani and Fusarium spp., effects of environmental factors on root rot and summarize to date disease management approach.

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“…Nas plantas de feijão-da-china, a eficiência no controle do patógeno foi de 67%, 30 dias depois de ser inoculado nas plantas (SUNAR et al, 2015). Outras espécies de Bacillus também demonstraram efeito biofungicida como B. pseudomycoides (KNEŽEVIĆ et al, 2021), B. licheniformis (LEE et al, 2006 Dentre os métodos de controle biológico de pragas, uma das alternativas disponíveis é a utilização de culturas geneticamente modificadas, dentre essas a soja Bt, por meio da inserção dos genes Cry de B. thuringiensis (SCHÜNEMANN et al,2014). Essa bactéria produz inclusões cristalinas durante a esporulação (toxinas Cry) que contêm proteínas inseticidas chamadas αendotoxinas.…”

Section: Biofungicidasunclassified

Bioprodutos a base de Bacillus na agricultura: situação atual e perspectivas

Handte¹,

Portela²,

Sobucki³

et al. 2022

Aspectos Da Biotecnologia Agrícola Aplicada

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Os efeitos nocivos no ambiente e nos seres humanos dos pesticidas e adubos sintéticos utilizados na agricultura têm estimulado a adoção de métodos menos agressivos de proteção e nutrição de plantas. Uma alternativa para reduzir ou substituir o uso destes produtos sintéticos é o uso de microrganismos, os quais apresentam menores impactos se comparados aos produtos químicos. Atualmente há registrado no Ministério da Agricultura, Pecuária e Abastecimento muitos produtos microbiológicos/bioprodutos, entre eles 38 acaricidas, 5 bactericidas, 66 fungicidas, 242 inseticidas e 46 nematicidas. Alguns desses são utilizados também como inoculantes e/ou estimuladores do crescimento de plantas. O gênero de bactérias Bacillus é o princípio ativo de muitos destes bioprodutos. Este gênero é constituído de bactérias Gram positivas, pertencentes ao filo Firmicutes. Além de apresentar multiplicidade de mecanismos de importância agrícola, se difere de muitos gêneros de bactérias por formar endósporos. As espécies de Bacillus possuem um papel importante no controle biológico. Além disso, algumas destas bactérias estimulam o crescimento vegetal pela melhoria da nutrição, solubilização de fosfato e liberação de hormônio vegetais. Atualmente, diversas instituições públicas e privadas estão investindo no desenvolvimento de bioprodutos com o gênero Bacillus, demandando mais pesquisas e informações sobre estas bactérias. Neste capítulo será apresentado uma visão geral sobre os bioprodutos agrícolas brasileiros que possuem as bactérias do gênero Bacillus como princípio ativo, sua aplicação e perspectivas na agricultura.Palavras-chaves: produtos biológicos controle biológico, nutrição de plantas, sustentabilidade. IntroduçãoO Brasil é um país com grande potencial de produção agrícola devido a sua extensão territorial e variedade de paisagens e clima. O agronegócio representa 26,6% do PIB no país e tem grande participação na produção global de alimentos, produzindo e exportando commodities agrícolas (CEPEA, 2021).No entanto, a produção agrícola brasileira, em sua maioria, é dependente da

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The ability of a new strain of Bacillus pseudomycoides to improve the germination of alfalfa seeds in the presence of fungal infection or chromium

Cited by 15 publications

References 41 publications

Synergistic effect of Bacillus isolates and biomass ash on soil and plant quality: A preliminary potexperiment with the analysis of potentially toxic elements

Synergistic effect of Bacillus isolates and biomass ash on soil and plant quality: A preliminary potexperiment with the analysis of potentially toxic elements

Root rot a silent alfalfa killer in China: Distribution, fungal, and oomycete pathogens, impact of climatic factors and its management

Bioprodutos a base de Bacillus na agricultura: situação atual e perspectivas

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