Diversidade de fungos micorrízicos arbusculares em área de Caatinga, PE, Brasil

Mello, Catarina Maria Aragão de; Silva, Iolanda Ramalho da; Pontes, Juliana Souza de; Goto, Bruno Tomio; Silva, Gladstone Alves da; Maia, Leonor Costa

doi:10.1590/s0102-33062012000400023

Cited by 26 publications

(22 citation statements)

References 35 publications

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“…In the Caatinga, the presence of AMF plays an important role in the establishment and maintenance of vegetation (Mello et al, 2012;Sousa et al, 2013), providing constitutes a mechanism for the adaptation of plants to soils with nutrient restrictions. Thus, arbuscular mycorrhizal fungi present variable tolerance to changes in the environment and soil management, responding to these modifications with changes in the number of propagules (Mello et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Arbuscular mycorrhizal fungi in soils of arboreal Caatinga submitted to forest management

Pereira

Barreto-Garcia

Scoriza

et al. 2018

Agraria

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ABSTRACT:The arbuscular mycorrhizal fungi (AMF) community presents a variable tolerance to changes in the medium, to which it responds modifying the number of propagules. For this reason, the study of the effect of different management practices on this community can help to understand the magnitude of the changes caused to the ecosystem. The objective of this study was to evaluate changes in the community of arbuscular mycorrhizal fungi in the soil in an area of arboreal Caatinga submitted to forest management. The study was conducted in Contendas do Sincorá (BA). Three types of forest management (clear-cutting, selective logging based on diameter, and selective logging based on species) and one control area were evaluated. Soil samples were collected at 0-10 cm depth in two periods (five and 10 months after management). AMF spores were present in low density (< 1 spore g -1 soil), dry and non-viable, and were generally more abundant in managed areas. Fewer species were observed in the control area. The AMF community showed to be related to the attributes of the soil and sensitive to management practices, demonstrating greater impact under clear cut management.Key words: AMF community; spore diversity; indicator of sustainability Fungos micorrízicos arbusculares em solo sob Caatinga arbórea submetida a manejo florestal RESUMO: A comunidade de fungos micorrízicos arbusculares (FMA) apresenta diferentes tolerâncias a alterações no meio, respondendo a estas mudanças com modificações no seu número de propágulos. Por essa razão, o estudo do efeito de diferentes práticas de manejo sobre esta comunidade pode auxiliar no entendimento da magnitude das alterações ocasionadas no ecossistema. O objetivo deste estudo foi avaliar mudanças na comunidade de fungos micorrízicos arbusculares do solo em área de Caatinga arbórea submetida a manejo florestal. O estudo foi realizado em Contendas do Sincorá (BA). Foram avaliados três tipos de manejo florestal (corte raso, corte seletivo por diâmetro e corte seletivo por espécie) e uma área testemunha. As amostras de solo foram coletadas na profundidade de 0-10 cm, em dois períodos (cinco e 10 meses após a execução do manejo). Os esporos de FMA apresentaram-se em baixa densidade (< 1 esporo g -1 de solo), secos e inviáveis e, geralmente, em maior quantidade nas áreas manejadas. Menor número de espécies foi observado na testemunha. A comunidade de FMA mostrou-se relacionada aos atributos do solo e sensível as práticas de manejo, demonstrando maior impacto do manejo corte raso.

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Section: Introductionmentioning

confidence: 99%

“…Thus, arbuscular mycorrhizal fungi present variable tolerance to changes in the environment and soil management, responding to these modifications with changes in the number of propagules (Mello et al, 2012). For this reason, the AMF community is usually considered a good soil indicator (Pagano et al, 2011b).…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi in soils of arboreal Caatinga submitted to forest management

Pereira

Barreto-Garcia

Scoriza

et al. 2018

Agraria

View full text Add to dashboard Cite

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“…On the other hand, Mello et al (2012) found in their studies, in a preserved caatinga area in Pernambuco, a very low number of glomerospores (1 spore•g -1 soil), when compared to the In the peanut seeds, due to contamination with fungi, disinfestation was performed by immersion in 70% alcohol for 30 seconds, followed by 1 minute in 0.2% sodium hypochlorite, being subsequently rinsed with distilled water and autoclaved (sterilized), seven times (Vincent, 1970modified by Silva, 2012. Sorghum was sown directly in the pots, each pot received 100 seeds at the moment in which the peanut seedlings were transplanted, two seedlings per pot.…”

Section: Resultsmentioning

confidence: 99%

“…A fact that may have been given caused by the high content of organic matter located in the area, which may have benefited the development of organisms that prey on glomerospores (Mello et al, 2012). Or still, as seen in Souza et al (2003), in soils with high levels of P, there is a reduction in their production.…”

Section: Discussionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi activity in Haplic Luvisol on the semi-arid region of Pernambuco Brazil

et al. 2017

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ABSTRACT:The use of microorganisms aiming to improve the availability of nutrients for plants is an important and necessary practice for agriculture. Thus, studies on the AMF occurrence in the brazilian northeastern and efficiency tests using native plants in the region have been intensified on recent decades. Aiming to determine the most probable number (MPN) of infective propagules in the area with native vegetation on the semi-arid region of Pernambuco, municipality of Sertânia, quantify the soil protein related to easily extractable glomalin (SPREEG) and to total glomalin (SPRTG), experiments were conducted in a greenhouse. For this study 10 composite soil samples were collected, with points randomly defined. Samples were homogenized and analyzed for physical and chemical characteristics. Being used for immediate examination and preparation trap cultures (one three-month cycle of propagation) to AMF, using as host plants sorghum (Sorghum bicolor L. Moench), and peanut (Arachis hypogaea L.). To determine the MPN of infective propagules of AMF in Haplic Luvisols, soil inoculum samples were diluted in the proportions of 0, 1:10, 1:100 and 1:1000 (soil inoculum: diluent soil, v:v) with 5 repetitions each, using maize (Zea mays L.) as host plant. The direct count (DC) differed significantly from the indirect (IC) of AMF with averages of 961.3 and 517.4 glomerospores per 100g soil, respectively. The NMP of infective propagules of AMF propagules found was 23 cm -3 and SPREEG and SPRTG were approximately 0.46 and 0.26 mg glomalin g -1 aggregate, respectively. RESUMO: O uso de micro-organismos com o objetivo de melhorar a disponibilidade de nutrientes para as plantas é uma prática importante e necessária para a agricultura. Assim, trabalhos sobre a atividade de fungos micorrízicos arbusculares (FMA) no Nordeste do Brasil e testes de eficiência utilizando plantas nativas da região vêm se intensificando nas últimas décadas. Objetivando determinar o número mais provável (NMP) de propágulos

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“…Mello et al (2012) encontraram taxas de colonização inferiores a 10% em solos da Caatinga com altas concentrações de P no solo, pois baixas ou altas concentrações de P no solo podem aumentar ou diminuir a colonização micorrízica. Samarão et al (2011), avaliando diferentes doses de P em plantas de graviola, inoculadas com inóculo nativo, encontraram aumento no percentual de colonização até a dose de 53,5 mg kg -1 de P, indicando que as espécies nativas de FMA são responsivas a pequenas doses de P adicionadas ao substrato.…”

Section: Resultsunclassified

Development and mycorrhizal colonisation in embauba seedlings fertilised with natural phosphates and organic material

Silva

Gomes

Filho

et al. 2016

Revista Ciência Agronômica

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RESUMO -A Embaúba (Cecropia pachystachya Trécul) é uma espécie de comportamento pioneiro, rústica e de crescimento rápido, ideal para cultivo em solos de baixa fertilidade, o que justifica sua dependência em relação aos fungos micorrízicos arbusculares (FMA). A simbiose dessa planta com os FMA amplia sua eficiência na absorção dos nutrientes da solução do solo, principalmente os de pouca mobilidade como o fósforo, o que possibilita o uso de adubo fosfatado de baixa solubilidade na produção de mudas. Para avaliar essa possibilidade foi conduzido um trabalho em casa de vegetação por 120 dias, no qual foi testado o fosfato de rocha natural em cinco doses de P (0; 75; 150; 300 e 600 mg L -1 ), sobre a colonização por FMA e o desenvolvimento de mudas de embaúba cultivadas em substrato composto por solo natural (SN), solo natural com 50% (v/v) de solo esterilizado (SND) e solo natural com 25% (v/v) de material orgânico (SNM). Avaliou-se a altura, produção de massa seca da parte aérea, diâmetro do colo, teores de N, P, K, percentagem de colonização micorrízica radicular, número de esporo de FMA no substrato, a respiração basal do solo (RBS), o carbono da biomassa microbiana (CBM) e o quociente metabólico do solo (qCO 2 ). O crescimento, diâmetro do colo e a produção de massa seca da parte aérea da embaúba não foram favorecidos pelos substratos e nem pelas doses de P. Todavia a colonização micorrízica radicular, a esporulação, RBS, CBM e qCO 2 foram influenciadas pelas adubações fosfatada e orgânica adicionadas ao solo. Palavras-chave:Cecropia pachystachya Trécul. Fósforo. Micorriza. Adubação orgânica. ABSTRACT -Known locally as embauba, Cecropia pachystachyaTrécul is a rustic, pioneer species with fast growth, ideal for cultivation in soils of low fertility, which explains its dependence on arbuscular mycorrhizal fungi (AMF). The symbiosis of this plant with AMF increases its efficiency in absorbing nutrients from the soil solution, especially those of low mobility such as phosphorus, which makes it possible to use phosphate fertilisers of low solubility in the production of seedlings. To evaluate this possibility, work was carried out in a greenhouse for 120 days, where natural rock phosphate was tested at five doses of P (0, 75, 150, 300 and 600 mg L -1 ) for colonisation by AMF. Also tested was the development of embauba seedlings grown in a substrate comprising natural soil (SN), natural soil with 50% (v/v) sterilised soil (SND), and natural soil with 25% (v/v) organic material (SNM). Evaluations were made of height, shoot dry weight production, stem diameter, levels of N, P, K, percentage mycorrhizal root colonisation, number of AMF spores in the substrate, soil basal respiration (RBS), microbial biomass carbon (CBM) and soil metabolic quotient (qCO 2 ). Growth, stem diameter and shoot dry matter in the embauba were not benefitted by the substrates or the levels of P. However, root mycorrhizal colonisation, sporulation, RBS, CBM and qCO 2 were affected by the phosphorus and organic fertilisers added to the soil.

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Diversidade de fungos micorrízicos arbusculares em área de Caatinga, PE, Brasil

Cited by 26 publications

References 35 publications

Arbuscular mycorrhizal fungi in soils of arboreal Caatinga submitted to forest management

Arbuscular mycorrhizal fungi in soils of arboreal Caatinga submitted to forest management

Arbuscular mycorrhizal fungi activity in Haplic Luvisol on the semi-arid region of Pernambuco Brazil

Development and mycorrhizal colonisation in embauba seedlings fertilised with natural phosphates and organic material

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