Papers by Marlon Cristian Toledo Pereira
Scientia Agricola
Increased planting density, different types of thinning management, and the use of beneficial mic... more Increased planting density, different types of thinning management, and the use of beneficial microorganisms have been adopted as strategic tools in the effort to increase crop yields in a sustainable manner. This investigation evaluated the growth and production of 'Prata Anã Gorutuba' banana (Musa spp., AAB) under different plant densities during two production cycles in the semiarid region of Minas Gerais, Brazil. Micropropagated plantlets were also inoculated with endophytic bacteria and cultivated as part of two mat management strategies. Planting density varied between 1,680 and 3,920 plant ha-1. During the experiment, water was less than optimal because of rationing due to drought in the region. Under field conditions, there was no difference between bacterially inoculated and non-inoculated plants. The dense planting system increased the crop cycle. The highest-density planting treatment (3,920 plant ha-1) resulted in the highest yield in the first cycle, but no net income was observed. However, the high-density planting treatments resulted in the highest yields and gross incomes in the second production cycle. Management with thinning of plants up to 10-months-old and thinning up to harvest associated with high planting density increased the length of the production cycles. Although the water restriction experienced in the first and second crop cycles, the vegetative and productive traits of 'Prata Anã Gorutuba' banana did not compromise the objectives of this study.
Industrial Crops and Products
Anais da Academia Brasileira de Ciências
The banana tree is associated with different species of endophytic bacteria that can stimulate pl... more The banana tree is associated with different species of endophytic bacteria that can stimulate plant growth. However, further studies are needed to better understand the relationships between this group of bacteria and the host plant. The objective of this study was to investigate the localization of the EB-40 (Bacillus sp.) through anatomical and ultrastructural analyses in micropropagated banana plantlets. The results demonstrated the effective colonization of the EB-40 isolate in the intercellular and intracellular spaces, as well as in the rhizosphere region. The wall of endophytic bacteria contains calcium and nitrogen. The EB-40 isolate was also observed to associate with the plasma membrane and cell wall. These results further our understanding of the mechanisms involved in the colonization of plant cells by endophytic bacteria in micropropagated banana plantlets.
Revista Ceres
Phenology and thermal requirements of the atemoya tree (Annona cherimola Mill. X Annona squamosa ... more Phenology and thermal requirements of the atemoya tree (Annona cherimola Mill. X Annona squamosa L.) The present study had as the main objective the documentation and characterization of the different phenological stages, as well as the definition of the thermal requirements, of the atemoya tree for two agronomic seasons. From shoot development to senescence and beginning of the rest period eight main stages were described (shoot development, leaf development, shoot/bud growth, inflorescence appearance, flowering, fruit development, fruit maturity and senescence and the beginning of the rest period). The number of days and the thermal requirements for completing each phenological stage were different between the two agronomic seasons of the atemoya. The first and second agronomic season presented a period of 217 and 206 days, with thermal requirements of 2469 and 2302 degree days, respectively.
Agronomy Science and Biotechnology
The use of biomass as an energy source has increased as far as it aims at providing sustainable e... more The use of biomass as an energy source has increased as far as it aims at providing sustainable energy alternatives and considerable reduction in agro-industrial and urban solid waste. Techniques employed for different types of biomass by biorefineries intend not only to add value to a bioproduct, but also to reduce environmental impact caused by industrial and agricultural residues. The coconut fruit shell residue, largely consumed in coastal regions, rich in fiber, lignin, cellulose and hemicelluloses, may be transformed through chemical, biochemical and thermochemical processes, into several bioproducts with proper energetic yield such as activated carbon, ethanol and biodiesel. This work was done through literature review, magazines and articles in order to analyse the energetic potential use of green dwarf coconut biomass (Cocos nucifera) by biorefineries as well as alternatives for reducing tons of fruit fibrous drupe waste commonly dumped in the environment
Protoplasma
The exogenous application of GA3 to atemoya tree flowers induces parthenocarpy, and in associatio... more The exogenous application of GA3 to atemoya tree flowers induces parthenocarpy, and in association with artificial pollination, it increases the fruit size. Morphological, anatomical, ultrastructural, and chemical aspects were evaluated during development of (1) fruit produced by artificial pollination (AP), (2) fruit from AP followed by the application of 250 ppm GA3, and (3) parthenocarpic fruit induced by the application of 1000 ppm GA3. Fruit growth showed a sigmoidal pattern, with development occurring in three phases: (I) cell division, (II) cell differentiation, and (III) maturation. Phase I presented cells with large nuclear volumes and a large population of organelles, phase II presented cells with a reduction in cytoplasm and an increase in vacuole volume, and phase III presented cells with an increase in plastids with reserve compounds. The application of GA3, in association with pollination, precedes cytological events and delays when applied exclusively. GA3 promotes the growth of pollinated fruits by stimulating cell division and expansion, which occur in association with reduced seed production, and the GA3 induces parthenocarpy by maintaining division and stimulating cell expansion. The absence of seeds accounts for the smaller size of the parthenocarpic fruits, and the lower accumulation of calcium accounts for less firm fruit.
Revista Brasileira de Fruticultura
The use of bio-fertilizers and microbial inoculants that promote plant growth and increased yield... more The use of bio-fertilizers and microbial inoculants that promote plant growth and increased yield has been accepted as an alternative to reduce the use of chemical fertilizers. The objective of the present study was to evaluate the effect of plant growth promoting bacteria inoculation on growth and quality of micropropagated banana seedlings ‘Prata Anã’. The experimental design was completely randomized, with four replications and the treatments consisted of 24 isolates of endophytic bacteria. The isolates EB-50 (Bacillus sp.) and EB-133 (Bacillus amyloliquefaciens) characterized as diazotrophic, the EB-51 (Bacillus pumilus) indicate for inorganic phosphate solubilization and EB-55(Bacillus subtilis) and EB-40 (Bacillus sp.) indole-3-acetic acid producers have provided significant increases for length, pseudostem diameter, fresh masses and dry masses in ‘Prata Anã’ micropropagated banana seedlings.
Anais da Academia Brasileira de Ciencias, Jan 4, 2017
Forty isolates of endophytic bacteria isolated from banana tree roots were assessed as to their c... more Forty isolates of endophytic bacteria isolated from banana tree roots were assessed as to their capacity to solubilize phosphate in a solid culture medium supplemented with different inorganic and one organic source of phosphorus. The amount of phosphorus (P) in each liquid medium was quantified, and an indirect assessment of acid phosphatase activity was performed. All assays had a fully randomized design, with three repetitions. Approximately 67.5% of the 40 isolates assessed in solid medium solubilized phosphorus from tricalcium phosphate and 7.5% of the isolates solubilized phosphorus from soy lecithin; no isolates exhibited P solubilization capacity in medium supplemented with iron phosphate. Acid phosphatase activity was detected in 65% of the isolates; Aneurinibacillus sp. and Lysinibacillus sp. isolates presented with the best solubilization indexes. All of the assessed isolates exhibited a capacity to reduce the potential of hydrogen in liquid medium supplemented with trica...
Ciência Rural, 2015
RESUMO: O objetivo deste trabalho foi avaliar o efeito da aplicação de CaCl2 em pré-colheita, em ... more RESUMO: O objetivo deste trabalho foi avaliar o efeito da aplicação de CaCl2 em pré-colheita, em diferentes doses e épocas no controle do despencamento natural de frutos da bananeira 'FHIA-18'. O delineamento experimental foi o de blocos casualizados, em esquema fatorial 3x3+1 testemunha, sendo testadas as doses de 2, 4 e 6% de CaCl2 aos 60, 90 e 120 dias após a emissão do cacho, com cinco repetições e uma planta por parcela. Observou-se redução linear da resistência ao despencamento e do tempo de maturação do fruto com o acréscimo das doses de CaCl2. Os frutos apresentaram maior firmeza com três aplicações de CaCl2. Os teores de cálcio da casca e da polpa não foram alterados significativamente com as doses e épocas de aplicações do CaCl2, indicando que o cálcio não é absorvido efetivamente pelo fruto. A aplicação de CaCl2 na pré-colheita não reduz o despencamento dos frutos da bananeira 'FHIA-18'.
Pesquisa Agropecuaria Brasileira, Sep 1, 2010
... Sérgio Luiz Rodrigues Donato I ; Alex Aguiar Lédo I ; Marlon Cristian Toledo Pereira II ; Eug... more ... Sérgio Luiz Rodrigues Donato I ; Alex Aguiar Lédo I ; Marlon Cristian Toledo Pereira II ; Eugênio Ferreira ... E-mail: [email protected] III Embrapa Mandioca e Fruticultura Tropical, Caixa Postal ... S. de O. e; LUCCA FILHO, OA; LIMA, MB; DOMINGUES, H.; ALVES, J. da S ...
Acta Horticulturae, 2010
ABSTRACT
O cultivo de anonáceas, como a pinha, a atemoia e a graviola, é uma alternativa rentável de produ... more O cultivo de anonáceas, como a pinha, a atemoia e a graviola, é uma alternativa rentável de produção de frutas, principalmente para regiões de clima tropical e subtropical. As mudas de pinha podem ser produzidas por sementes, enquanto as de atemoia e as de graviola devem ser propagadas por enxertia. As anonáceas são muito exigentes em nutrição e, neste sentido, torna-se imprescindível a análise regular do solo e da folha para recomendação da adubação. A poda regular permite a condução das plantas com o maior número de ramos, que suportem maior quantidade de frutos de qualidade comercial, além de possibilitar a produção de duas safras de uma mesma planta por ano nas condições irrigadas do Semiárido brasileiro. As flores das anonáceas apresentam dicogamia protogínica e devem ser polinizadas artificialmente com o uso de pincel ou bombinha polinizadora. As principais pragas são as brocas do fruto, da semente e do tronco, enquanto a antracnose tem causado os maiores prejuízos dentre as d...
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Papers by Marlon Cristian Toledo Pereira