Land use and vegetation cover on native symbionts and interactions with cowpea

Rocha, Beatriz C. F.; Santos, Enésia O. da S.; Santos, José Geraldo Donizetti dos; Takako, Adriana K.; Castro, Fabio J.

doi:10.1590/1807-1929/agriambi.v21n2p116-121

Cited by 5 publications

(4 citation statements)

References 17 publications

(18 reference statements)

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“…The silvopastoral system soils were not managed with fertilization or tillage since their implementation, keeping only livestock, so this management system favored rhizobia community development (Pires et al 2018), of which 70% of the isolates that nodulated in the cowpea authentication experiment had RE equal or higher than the recommended strains BR3262 and BR3267. Rocha et al (2017) observed that the land use change to pasture stimulated the multiplication of rhizobia in cowpea plants, and that plants were benefited in growth, especially in soil previously cultivated with grass crops. Soils cultivated for long periods with grasses are also known to maintain a rich rhizobial community and to establish symbiosis with succeeding legumes, providing a resilience effect (Lima et al 2009;Wakelin et al 2018).…”

Section: Resultsmentioning

confidence: 99%

Rhizobial diversity in shrub-tree legume-based silvopastoral systems

Santos

Fracetto

et al. 2022

Bragantia

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Silvopastoral systems based on tree legumes intercropped with forage grasses can harbor a high diversity of rhizobia, and these bacteria are good indicators of soil quality in several management systems. The objective of this work was to evaluate the morphophysiological, genetic and symbiotic diversity of cowpea [Vigna unguiculata (L.) Walp] rhizobia from soils under silvopastoral systems based on shrub-tree legumes. The experiment was performed in a randomized block design with three treatments and three replications, consisting of signalgrass (Urochloa decumbens Stapf.) intercropped with sabia (Mimosa caesalpiniaefolia); signalgrass intercropped with gliricidia (Gliricidia sepium) and single signalgrass. The samples were collected in the legume row (0 meter) and 4 and 8 meters away.Later, cowpea was used as a trap plant to capture the rhizobia. All strains were phenotypically characterized, authenticated, and genetically identified. Phenotypical characterization of the 431 isolates showed high diversity forming 69 groups at 100% similarity, of which 60 were able to nodulate cowpea during the authentication, and 36 presented relative efficiency superior or equal to the recommended bacteria for the crop. Most of the sequenced strains belonged to Bradyrhizobium (67%) and Methylobacterium (9%). Leifsonia (9%), Cohnella (6%), Rhizobium (3%), Burkholderia (3%), and Paenibacillus (3%) were also represented. Soils under silvopastoral systems harbor efficient rhizobia populations in cowpea with a high genetic diversity, which can be recommended for agronomic efficiency assays.

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Section: Resultsmentioning

confidence: 99%

Rhizobial diversity in shrub-tree legume-based silvopastoral systems

Santos

Fracetto

et al. 2022

Bragantia

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“…This scenario may benefit agroecological production systems, where pesticides are avoided and inoculated plants may still produce as much as non-defoliated plants even under herbivory. In this context, it is acknowledged that, besides the already known benefits of diazotrophic bacteria, such as BNF, promotion of plant growth, and tolerance to salinity (Costa et al, 2013;Silva et al, 2016;Rocha et al, 2017), there is evidence of beneficial effects concerning tolerance against defoliation in cowpea.…”

Section: Resultsmentioning

confidence: 99%

Can inoculation with diazotrophic bacteria decrease the productivity loss of defoliated Vigna unguiculata (L.) Walp?

Bráulio

Silva

et al. 2021

Rev. bras. eng. agríc. ambient.

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The objective of this study was to evaluate the effect of artificial defoliation on vegetative and productive stages of cowpea inoculated with diazotrophic bacteria, in two experiments. The first experiment was performed in a greenhouse with 5 × 5 factorial (five defoliation percentages and five N sources), with four repetitions. N sources consisted of bacterial inoculation with strains INPA 03-11B, UFLA 03-84, UFRB FA34C2-2, and two control treatments: i - with N fertilization and ii - blank control, without N fertilization and without inoculation. The second experiment was performed in the field, in a 3 × 5 factorial scheme, with three repetitions. Treatments consisted of three N sources: with N fertilization, with bacterial strain INPA 03-11B that was selected in the first experiment, and five percentages of artificial defoliation. Defoliation percentages for both experiments were 0, 25, 50, 75, and 100%. Artificial defoliation during the vegetative stage caused reduction in the dry mass of bacterial nodules. Inoculation increased plant tolerance to defoliation and enhanced grain nutrient concentration (N and P). Inoculation with the strain INPA 03-11B allowed cowpea plants to tolerate 50% defoliation in the vegetative stage. The mean productivity of cowpea was reduced under > 50% defoliation during the productive stage; therefore, control of defoliating pests until the productive stage is not necessary under field conditions.

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“…As comunidades nativas de fungos micorrízicos e bactérias fixadoras de nitrogênio são afetadas pelo uso do solo e pelo tipo de cobertura vegetal. Fungos micorrízicos e rizóbios são componentes importantes de agroecossistemas, respondendo à interferência humana, por exemplo (ROCHA et al, 2017).…”

Section: Introductionunclassified

Produção De Mudas Florestais Inoculadas Com Rizóbios E Fungos Micorrízicos Em Blocos De Resíduos Agroindustriais

Andraus

Cardoso

Ferreira

et al. 2020

NAT

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O objetivo deste trabalho foi avaliar os aspectos fitotécnicos de mudas florestais cultivadas em blocos prensados com resíduos agroindustriais e o efeito da inoculação microbiológica sobre as mudas. Confeccionou-se quatro compostos com diferentes proporções de bagaço de cana, torta de filtro, fibra de coco e resíduos aviários. Nos blocos prensados do substrato selecionado foram plantadas sementes de Sesbania virgata, Eucalyptus grandi e Acacia mangium. As sementes de Sesbania virgata e Acacia mangium foram inoculadas com rizóbios e fungos micorrízicos específicos, as de Eucalyptus grandi foram inoculadas apenas com os fungos. Aos 70 dias após a semeadura, foram avaliados parâmetros de colonização micorrízica, nodulação, fitotécnicos e nutrição. O delineamento utilizado foi o de blocos completos casualizados em esquema fatorial 4 x 2. Os dados foram submetidos à análise de variância e teste de comparação de médias. Verificou-se que o sistema de produção de mudas em blocos prensados, confeccionados com resíduos agroindustriais, proporciona melhor desenvolvimento das mudas de Sesbania virgata em relação ao tubete convencional, porém não teve efeito no desenvolvimento de mudas de Acacia mangium em relação ao tubete convencional. A inoculação com rizóbio, isoladamente ou associada com fungos micorrízicos arbusculares na fase de produção de mudas, auxiliou no desenvolvimento da espécie Acacia mangium. A produção de Eucalyptus grandis em blocos prensados de resíduos agroindustriais não proporcionou vantagens sobre o desenvolvimento das mudas em tubetes.Palavras-chave: aproveitamento de resíduos; microrganismos benéficos; produção sustentável. PRODUCTION OF INOCULATED FOREST SHAPES WITH RHIZOBIUM AND MYCORRYZIC FUNGI IN AGRICULTURAL WASTE BLOCKS ABSTRACT: The objective of this work was to evaluate the phytotechnical aspects of plant seedlings in blocks pressed with agroindustrial residues and the effect of the microbiological inoculation on the seedlings. Four doses with different ratios of sugarcane bagasse, filter cake, coconut fiber and avian residues were made. In the pressed blocks of the selected substrate were planted seeds of Sesbania virgata, Eucalyptus grandi and Acacia Mangium. The seeds of Sesbania virgata and Acacia mangium were inoculated with rhizobia and specific mycorrhizal fungi. At 70 days after sowing, mycorrhizal colonization, nodulation, phytotechnical and nutrition parameters were evaluated. The design used was a randomized complete block in a 4 x 2 factorial scheme. It was verified that the system of production of seedlings in pressed blocks, made with agroindustrial residues provides better development of the seedlings of Sesbania virgata in relation to the conventional tube, but did not have effect in the development of seedlings of Acacia mangium in relation to the conventional tube. Inoculation with rhizobia alone or associated with arbuscular mycorrhizal fungi in the seedling production phase assisted the development of the Acacia mangium species. The production of Eucalyptus grandis in pressed blocks of agroindustrial residues did not provide advantages for the development of seedlings in tubes.Keywords: waste use; beneficial microorganisms; sustainable production.

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Land use and vegetation cover on native symbionts and interactions with cowpea

Cited by 5 publications

References 17 publications

Rhizobial diversity in shrub-tree legume-based silvopastoral systems

Rhizobial diversity in shrub-tree legume-based silvopastoral systems

Can inoculation with diazotrophic bacteria decrease the productivity loss of defoliated Vigna unguiculata (L.) Walp?

Produção De Mudas Florestais Inoculadas Com Rizóbios E Fungos Micorrízicos Em Blocos De Resíduos Agroindustriais

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