Nutrient Competition
Mostrando 1-12 de 52 artigos, teses e dissertações.
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1. Production and Nutrient Accumulation of Common Bean Cultivars under Competition with Weed
RESUMO: O manejo inadequado das plantas daninhas é uma das causas da baixa produtividade do feijoeiro, pois ele é muito suscetível à interferência delas, devido ao seu crescimento inicial lento. Objetivou-se com este trabalho avaliar a influência da trapoeraba na produção de grãos e acúmulo de nutrientes de cultivares de feijoeiro. O experimento fo
Planta daninha. Publicado em: 02/12/2019
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2. Competitive Capacity and Rhizosphere Mineralization of Organic Matter During Weed-Soil Microbiota Interactions
RESUMO: A competição entre plantas daninhas e culturas é um dos principais fatores responsáveis por perdas de produtividade nos campos agrícolas. Esta revisão teve como objetivo apresentar e discutir como a interação entre plantas daninhas e microrganismos pode afetar a capacidade competitiva de plantas daninhas, bem como as propriedades físico-quí
Planta daninha. Publicado em: 18/02/2019
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3. Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir
ABSTRACT Intensive growth of aquatic macrophytes interferes with water quality and ecosystem dynamics worldwide. Although mechanically removing macrophytes is the most commonly used method for their eradication, it can also cause undesirable disturbances in aquatic reservoir communities. We performed laboratory incubations of phytoplankton sampled before and
Acta Bot. Bras.. Publicado em: 02/07/2018
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4. Phylogenetic community structure reveals differences in plant community assembly of an oligotrophic white-sand ecosystem from the Brazilian Atlantic Forest
ABSTRACT Mussununga, an oligotrophic sandy savanna ecosystem, comprises distinct physiognomies along fire, water and nutrient availability gradients. Grasslands and woodlands are constrained at the opposite poles of these gradients, with grasslands occurring in areas with poorer soils and higher levels of both water-stress and fire intensity. According to th
Acta Bot. Bras.. Publicado em: 21/09/2017
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5. Environmental severity promotes phylogenetic clustering in campo rupestre vegetation
The stress-dominance hypothesis postulates that the importance of competition in plant communities declines with increasing environmental stress while the importance of environmental filters increases. To test this hypothesis for campo rupestre vegetation, we analyzed phylogenetic diversity and community structure of angiosperm communities at two study sites
Acta Bot. Bras.. Publicado em: 2015-12
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6. Identification of genes expressed by Cryptococcus gattii during iron deprivation
Cryptococcus neoformans and C. gattii are pathogenic yeasts that cause life-threatening diseases in humans and animals. Iron is an essential nutrient for virtually every organism as it functions as a cofactor in numerous essential enzymatic reactions. In the literature, the competition for iron between microbes and mammalian hosts during infection is well do
Braz. J. Microbiol.. Publicado em: 2014-09
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7. The role of historical and ecological factors on initial survival of Copaifera langsdorffii Desf. (Fabaceae)
The plant population dynamic is affected by ecological and evolutionary processes that operate at all stages of the plant life cycle. The aim of this study was to characterize the seed and seedling performance of Copaifera langsdorffii by testing four hypotheses: the resource concentration hypothesis; the relationship between seed size and germinability hypo
Acta Bot. Bras.. Publicado em: 2013-12
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8. Influência da concentração de nutrientes na interação entre duas espécies fitoplanctônicas isoladas do Reservatório de Itupararanga - SP / Influence of nutrient concentration in the interaction between two phytoplankton species isolated from the Reservoir Itupararanga - SP
O Reservatório de Itupararanga, no interior do estado de São Paulo, tem como principal finalidade geração de energia elétrica e o abastecimento público, além de área de lazer e pesca. O crescimento urbano e agrícola em torno do corpo hídrico tem alterado a qualidade da água favorecendo a proliferação de cianobactérias. Estudos preliminares da c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/03/2012
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9. Efficacy and mode of action of yeast antagonists for control of Penicillium digitatum in oranges
Three yeast antagonists (two strains of Cryptococcus laurentii and one of Candida sake) from orange trees reduced incidence of green mold by 80 to 95% when tested in wounded orange fruits inoculated with Penicillium digitatum and incubated at 7ºC for 30 days. The yeasts inhibited conidial germination of the pathogen, but did not kill the spores. Effectivene
Tropical Plant Pathology. Publicado em: 2011-08
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10. O papel das macrófitas submersas sobre a qualidade da água, restauração e conservaçao de lagos rasos subtropicais : estudo de caso, a Lagoa Mangueira, RS
O objetivo desta Tese foi avaliar o papel da macrófitas submersas em relação à qualidade da água, interações com o fitoplâncton e ciclagem biogeoquímica na Lagoa Mangueira, um grande lago raso subtropical, no sul do Brasil. Para alcançar estes objetivos, este trabalho conta com uma série de abordagens, como: levantamentos de campo, etapas experime
Publicado em: 2010
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11. Competition of grapevine rootstocks cv. Cabernet Sauvignon at Caldas, MG. Effect on the early development of the plants / COMPETIÃÃO DE PORTA-ENXERTOS DE VIDEIRA PARA A CV.CABERNET SAUVIGNON. EFEITO SOBRE O DESENVOLVIMENTO INICIAL DAS PLANTAS.
The early development of grapevine cultivar Cabernet Sauvignon as to its vigor and nutrient absorption in different rootstocks, in two experiments under field conditions was evaluated in the NÃcleo TecnÃlogico EPAMIG Uva e Vinho (EPAMIG Technologic Center Grape and Wine) at Caldas, MG. In the first experiment, the rootstock cultivars IAC 313, IAC 572, IAC
Publicado em: 2008
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12. Functional and structural analysis of the BigR protein from Xylella fastidiosa involved in the regulation of Xf0768-0764 operon / Analise funcional e estrutural da proteina BigR de Xylella fastidiosa envolvida na regulação do operon Xf0768-0764
The XF0767 gene from Xylella fastidiosa is located in an operon composed by a set of genes (XF0768-XF0767-XF0766-XF0765-XF0764) of unknown function. This operon is conserved in a number of plant-associated bacteria including Agrobacterium tumefaciens, Mezorhizobium loti e Sinorhizobium meliloti. The DNA region upstream of the operon has canonical sequences c
Publicado em: 2008