971 resultados para Plants, Sex in.


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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As proteínas oxigenases com ferro não hêmico compartilham um domínio conservado composto por oito histidinas, podem ser encontradas em organismos eucariotos e procariotos, e participam de importantes vias de biossíntese lipídica. Para compreender a relação evolutiva existente entre essas proteínas, foram realizadas análises comparativa e filogenética em procariotos e eucariotos que permitiram uma classificação dessa família, até então inexistente. A busca de seqüências resultou, após a curadoria, em uma coleção de 448 proteínas, pertencentes a 58 organismos previamente selecionados dentro dos principais taxa. O alinhamento múltiplo de seqüências gerado com a ferramenta MAFFT (BLOSUM 62; L-INS-i) mostrou a presença do domínio de histidinas com espaçamento conservado entre os motivos. A classificação das proteínas feita com o software CLANS gerou 28 grupos a partir da similaridade entre pares de seqüências. Dentre esses, 2 contêm seqüências que não tiveram similaridade com proteínas já caracterizadas e 48 seqüências não foram atribuídas a quaisquer dos grupos formados. As seqüências de plantas, representadas por 119 seqüências da coleção, foram distribuídas em 7 grupos correspondentes às funções C4 metilesterol monoxigenase, C5 esterol desaturase, ácido graxo hidroxilase, esfingolipídeo C4 monooxigenase, aldeído decarbonilase, β-caroteno hidroxilase e Acil-ACP desaturase. A análise filogenética, utilizando o método de máxima verossimilhança com a ferramenta PhyML, mostrou a formação de grupos bem definidos e que foram similares aos gerados por CLANS. Esses resultados começam a preencher a lacuna existente até o momento acerca da relação evolutiva e da classificação das oxigenases com ferro não hêmico. Além disso, sugerem que dentro dessa família ainda há proteínas com funções desconhecidas, reforçando a necessidade de realizar mais estudos de caracterização funcional das mesmas.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Ciências Sociais - FCLAR

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Este trabalho analisa as doenças diagnosticadas pelo povo, as plantas medicinais empregadas em sua cura, os remédios utilizados, a medicina religiosa do candomblé, umbanda e catimbó e a fitoterapia no passado.

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Pós-graduação em Ciências Biológicas (Genética) - IBB

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Pós-graduação em Agronomia (Horticultura) - FCA

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This experiment was carried out to analyze dry mass production and distribution, and the content and accumulation of macronutrients in arrowleaf sida (Sida rhombifolia) plants cultivated under mineral nutrition standard conditions. Plants grew in seven liter pots filled with sand substrate and daily irrigated with nutrient solution, under greenhouse conditions. Treatments consisted of times of evaluation (21, 35, 49, 63, 77, 91, 105, 119, and 133 days after emergence - DAE) and were arranged in a completely randomized design with four replicates. Arrowleaf sida plants showed small accumulation of dry mass (0.3 g per plant) and macronutrients (6.9 mg N per plant, 0.7 mg P per plant, 8.6 mg K per plant, 4.9 mg Ca per plant, 2,6 mg Mg per plant, and 0.3 mg S per plant) at the vegetative growth stage (< 49 DAE). Those accumulations increased, mainly after 63 DAE, and the daily accumulation rate was crescent up to 94 DAE (dry mass - DM), 89 DAE (N and P), 98 DAE (K), 95 DAE (Ca and S), and 93 DAE (Mg), when there was accumulation of 26.3 g DM per plant, 402.6 mg N per plant, 45.6 mg P per plant, 359.3 mg K per plant, 337.6 mg Ca per plant, 71.9 mg Mg per plant, and 20.9 mg S per plant. N and K had the highest rates and, consequently, were the most required and accumulated in greater amounts in plant tissues of arrowleaf sida.

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The organic fertilizer can be a viable alternative in the production of forage grasses, however there is little information regarding doses and composition of the major organic fertilizers. The aim of this paper was to verify the influence of the different doses of organic compost produced from two types of poultry litter on the structural, morphogenetic and productive characteristics of Brachiaria brizantha cv 'Piatã'. The experiment was conducted in a greenhouse in a completely randomized design in a factorial scheme l with parcel subdivided in time. The parcels were composed by six treatments: two types of compost (poultry litter based in sugar cane and napier grass) in three doses (100, 200 and 300kg ha-1 equivalent N.) and the subparcels by the four different periods of cut. The composts were applied in a unique dose, after the uniformization cut, at the quantities: 11,36 and 11,83, 22,73 and 23,67, 34,09 and 35,50 g pot-1 for the poultry litter based in sugar cane and napier grass, respectively which are equivalent to the rates of 0, 100, 200 and 300kg ha-1 of N. The variables measured were: dry matter production (DMP), leaf appearance rate (LApR), phyllochron, leaf elongation dose (LER) and shoots elongation rate (SER), number of green leaves (NGL), final size of the leaf (FSL). No significant difference between the types of composts and in the interaction compost x doses was observed, thus, both could be used without the risk of loss in the use of the nutrients by the plants evaluated in the experiment. There was a significant difference between the DMP, LApR, phyllochron, LER, SER, NGL and FSL because of the increasing rates of nitrogen, followed by a linear model of prediction. The effect of the periods of slaughter was also observed, where the slaughters carried out in the summer presented a better performance over the morphogenetic and structural features evaluated.

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Currently, anastomosis groups (AG) of Rhizoctonia sp. on chrysanthemum and occurrence of this fungus on gypsophila have not been reported in Brazil. However, in the present study, normal and cross pathogenicity and sequencing of ITS-5.8S rDNA regions were used to confirm the AG of isolate of Rhizoctonia sp. obtained from chrysanthemum (White Papyrus) and from gypsophila plants cultivated in Holambra / São Paulo, Brazil. After these tests, it was confirmed the report of Rhizoctonia solani AG-4 HG I on chrysanthemum (White and Yellow Papyrus) and R. solani AG-4 HG III on gypsophila in the São Paulo state, Brazil, and also their cross pathogenicity.

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The objective of this work was to evaluate the effects of kinetin and calcium applications on the physiologic and productive traits of soybean plants, subjected to drought and shade conditions, at flowering. A randomized complete block design was used, in a split-plot arrangement, with four replicates. Soybean plants cultivated in 38 dm³ pots were sprayed with calcium and kinetin, alone or mixed, and subjected to drought and shade during 12 days. After stress period, plants were cultivated under appropriate water and light availability. Calcium and kinetin application resulted in maintenance of the relative water content after four days of drought beginning. Membrane damage, measured at the end of stress period, was lower in plants sprayed with calcium and kinetin. CO2 assimilation diminished by stress condition, mainly under drought, and grain yield decreased at the same intensity in both environments.

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Pós-graduação em Agronomia (Agricultura) - FCA