Interactions between arbuscular mycorrhizal fungi and other microbial inoculants (Azospirillum, Pseudomonas, Trichoderma) and their effects on microbial population and enzyme activities in the rhizosphere of maize plants

Vázquez, Manuel; César, Sonia; Azcón, R.; Barea, José Miguel

doi:10.1016/s0929-1393(00)00075-5

Cited by 315 publications

(136 citation statements)

References 38 publications

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“…Vázquez et al (2000) observaram que a inoculação de Azospirillum não influenciou a colonização por Glomus Tabela 1. Número de bactérias diazotróficas endofíticas (BDE) na raiz de trigo e teste F para comparação dos contrastes ortogonais obtidos entre os tratamentos.…”

Section: Resultsunclassified

Interação entre fungos micorrízicos arbusculares e bactérias diazotróficas em trigo

Sala

Freitas

Silveira

2007

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito da inoculação de dois novos isolados de bactérias diazotróficas endofíticas e da interação destas bactérias com fungos micorrízicos arbusculares (FMAs), na cultura do trigo. Foi realizado um experimento em casa de vegetação, com dois isolados de bactérias diazotróficas endofíticas, IAC11HT (Achromobacter insolitus) e IAC12HT (Zoogloea ramigera), e dois FMAs (Glomus sp. e Acaulospora sp.). Houve efeito sinérgico da co-inoculação na colonização das raízes por bactérias diazotróficas, com o emprego do FMA do gênero Acaulospora. As plantas associadas a Glomus, na presença dos isolados bacterianos, apresentaram maior crescimento, acúmulo e aproveitamento dos nutrientes do que as plantas colonizadas por Acaulospora sp., entretanto, não superaram os tratamentos em que as bactérias e os fungos foram inoculados isoladamente. Apesar de não ter havido efeito benéfico da co-inoculação FMA-bactéria diazotrófica sobre a maioria dos parâmetros avaliados, essas novas bactérias propiciaram o dobro de crescimento, acúmulo e aproveitamento do N e P em plantas de trigo.Termos para indexação: Zoogloea ramigera, Achromobacter insolitus, micorriza arbuscular, nitrogênio, fósforo. Interaction between arbuscular mycorrhizal fungi and diazotrophic bacteria in wheat plantsAbstract -The aim of this work was to evaluate the inoculation effect of two new endophytic diazotrophic bacteria and the interaction between arbuscular mycorrhizal fungi (AMF) and these bacteria on wheat plants.The experiment was carried out in a greenhouse with the two strains of diazotrophic bacteria, IAC11HT (Achromobacter insolitus) and IAC12HT (Zoogloea ramigera), and two AMF (Glomus sp. and Acaulospora sp.). There was synergistic effect of the co-inoculation on root colonization by diazotrophic bacteria with the AMF of the genus Acaulospora. The plants colonized by Glomus associated to bacterial strains showed higher growth, accumulation and exploitation of the nutrients than plants colonized by Acaulospora sp., however, this effect did not surpass the treatments in which bacteria and fungi were inoculated separately. Although there were nonbeneficial effects of the AMF-diazotrophic bacteria co-inoculation, for the most parameters assessed, these news bacteria strains promoted doubled shoot dry matter, shoot N and P concentration and accumulation in wheat plants.Index terms: Zoogloea ramigera, Achromobacter insolitus, arbuscular mycorrhiza, nitrogen, phosphorus. IntroduçãoNo solo há grande diversidade de microrganismos que estão em constante interação, principalmente na rizosfera das plantas, em razão da grande quantidade de nutrientes secretados e liberados pelas raízes, como lisados e exsudatos radiculares. Entretanto, essas interações são pouco estudadas, como as que ocorrem na micorrizosfera, entre os fungos micorrízicos arbusculares (FMAs) e as bactérias diazotróficas. Esses dois grupos de microrganismos estão associados à maioria das plantas cultivadas e são reconhecidamente benéficos, pelo incremento na...

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Section: Resultsunclassified

Interação entre fungos micorrízicos arbusculares e bactérias diazotróficas em trigo

Sala

Freitas

Silveira

2007

Pesq. agropec. bras.

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“…Smith and Daft, 1977;Abbott and Robson, 1978;Abbott et al, 1979;Ibijbijen et al,1996;Toro et al,1998). Moreover positive effects on Frankia (Jha et al, 1993;Yamanaka et al, 2005;Oliveira et al, 2005), Azotobacter (Sharma et al, 2002) and Azospirillum (Vázquez et al, 2000;Volpin and Kapulnik, 1994) N 2 -fixing ability or abundance have been recorded in several studies. However the interactive effects of AM fungi and N 2 -fixing organisms are not necessarily positive for planthost growth.…”

Section: N 2 -Fixationmentioning

confidence: 96%

“…Specific groups of microbes such as bacteria of the genus Azospirillum and some species of Pseudomonas (e.g. Walley and Germida, 1997;Vázquez et al, 2000; Fig. 1) have been reported to be favored whereas others decline (e.g.…”

Section: Microbial Community Shiftsmentioning

confidence: 99%

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Arbuscular mycorrhiza and soil nitrogen cycling

Veresoglou

Chen

Rillig

2012

Soil Biology and Biochemistry

296

153

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a b s t r a c tNitrogen is a major nutrient that frequently limits primary productivity in terrestrial ecosystems. Therefore, the physiological responses of plants to soil nitrogen (N) availability have been extensively investigated, and the study of the soil N-cycle has become an important component of ecosystem ecology and biogeochemistry. The bulk of the literature in these areas has, however, overlooked the fact that most plants form mycorrhizal associations, and that nutrient uptake is therefore mediated by mycorrhizal fungi. It is well established that ecto-and ericoid mycorrhizas influence N nutrition of plants, but roles of arbuscular mycorrhizas in N nutrition are less well established; perhaps even more importantly, current conceptual models ignore possible influences of arbuscular mycorrhizal (AM) fungi on N-cycling processes. We review evidence for the interaction between the AM symbiosis with microbes and processes involved in soil N-cycling. We show that to date investigations have rather poorly addressed such interactions and discuss possible reasons for this. We outline mechanisms that could potentially operate with regards to AM fungal e N-cycling interactions, discuss experimental designs aimed at studying these, and conclude by pointing out priorities for future research.

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“…Studies have indicated that AM fungi can increase the activities of soil enzymes such as phosphatase and dehydrogenase (Dodd et al, 1987;Kothari et al, 1990;Vá zquez et al, 2000). Dehydrogenase, a soil oxidoreductase, is an intracellular enzyme catalyzing oxidoreduction reactions of organic compounds.…”

Section: Introductionmentioning

confidence: 99%

Influence of Glomus etunicatum/Zea mays mycorrhiza on atrazine degradation, soil phosphatase and dehydrogenase activities, and soil microbial community structure

Huang

Zhang

et al. 2009

Soil Biology and Biochemistry

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a b s t r a c tThe effects of an arbuscular mycorrhizal (AM) fungus (Glomus etunicatum) on atrazine dissipation, soil phosphatase and dehydrogenase activities and soil microbial community structure were investigated. A compartmented side-arm ('cross-pot') system was used for plant cultivation. Maize was cultivated in the main root compartment and atrazine-contaminated soil was added to the side-arms and between them 650 or 37 mm nylon mesh was inserted which allowed mycorrhizal roots or extraradical mycelium to access atrazine in soil in the side-arms. Mycorrhizal roots and extraradical mycelium increased the degradation of atrazine in soil and modified the soil enzyme activities and total soil phospholipid fatty acids (PLFAs). Atrazine declined more and there was greater stimulation of phosphatase and dehydrogenase activities and total PLFAs in soil in the extraradical mycelium compartment than in the mycorrhizal root compartment when the atrazine addition rate to soil was 5.0 mg kg À1 . Mycelium had a more important influence than mycorrhizal roots on atrazine degradation. However, when the atrazine addition rate was 50.0 mg kg À1 , atrazine declined more in the mycorrhizal root compartment than in the extraradical mycelium compartment, perhaps due to inhibition of bacterial activity and higher toxicity to AM mycelium by atrazine at higher concentration. Soil PLFA profiles indicated that the AM fungus exerted a pronounced effect on soil microbial community structure.

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Interactions between arbuscular mycorrhizal fungi and other microbial inoculants (Azospirillum, Pseudomonas, Trichoderma) and their effects on microbial population and enzyme activities in the rhizosphere of maize plants

Cited by 315 publications

References 38 publications

Interação entre fungos micorrízicos arbusculares e bactérias diazotróficas em trigo

Interação entre fungos micorrízicos arbusculares e bactérias diazotróficas em trigo

Arbuscular mycorrhiza and soil nitrogen cycling

Influence of Glomus etunicatum/Zea mays mycorrhiza on atrazine degradation, soil phosphatase and dehydrogenase activities, and soil microbial community structure

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