Leaf Decay
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Analysis of the Gene Expression and RNAi-Mediated Knockdown of Chitin Synthase from Leaf-Cutting Ant Atta sexdens
Chitin synthase (CHS) is the enzyme specifically associated with chitin synthesis, an important component of diverse organisms including insects. Two alternative spliced transcripts of the CHS gene (AsCHS-A1 and AsCHS-A2) were identified by quantitative reverse-transcription polymerase chain reaction (RT-qPCR) during the development of the leaf-cutting ant A
J. Braz. Chem. Soc.. Publicado em: 2020-10
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2. Invertebrate herbivory on floating-leaf macrophytes at the northeast of Argentina: should the damage be taken into account in estimations of plant biomass?
ABSTRACT: We assessed the damage produced by invertebrate herbivores per leaf lamina and per m2 of populations floating-leaf macrophytes of Neotropical wetlands in the growth and decay periods, and assessed if the damage produced by the herbivores should be taken into account in the estimations of plant biomass of these macrophytes or not. The biomass remove
An. Acad. Bras. Ciênc.. Publicado em: 2018-03
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3. Leaf extracts of Casearia sylvestris and Casearia decandra affect growth and production of ligninolytic enzymes in wood decay basidiomycetes
RESUMO Basidiomicetos de podridão branca são capazes de deteriorar madeira e atuar como patógenos de árvores. A flora tropical é uma importante fonte de compostos antifúngicos ecologicamente seguros, entretanto, o conhecimento de como extratos vegetais afetam a fisiologia fúngica é limitado. Portanto, neste trabalho foi investigada a influência de e
Hoehnea. Publicado em: 2016-12
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4. Composition and antimicrobial activities of the leaf essential oil of Machilus zuihoensis from Taiwan
This study investigated the chemical composition, and antimicrobial and anti-wood-decay fungal activities of the essential oil isolated from the leaf of endemic Machilus zuihoensis Hayata, Lauraceae, of Taiwan. The essential oil from the fresh leaves of M. zuihoensis was isolated using hydrodistillation in a Clevenger-type apparatus, and characterized by GC-
Revista Brasileira de Farmacognosia. Publicado em: 23/11/2011
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5. EFFECT OF AQUEOUS FRACTION OF LEAVES DE COSTUS SPIRALIS (JACQ.) ROSCOE CONTRACTILE FUNCTION ON HEART MAMMALS. / EFEITO DA FRAÇÃO AQUOSA DAS FOLHAS DE COSTUS SPIRALIS (JACQ.) ROSCOE SOBRE A FUNÇÃO CONTRÁTIL DO CORAÇÃO DE MAMÍFEROS.
Teas and infusions from C. spiralis leaf have largely been used by folk medicine as diuretic, hypotensor, cytotoxic, immunomodulator, antilithiasic, antidiarrheic, antispasmodic, antiurolitic, antimicrobian, antifungic, antioxidant, antileishmania activity, antiinflamatory, and antiedematogenic activity. In spite of these biological effects attributed to the
Publicado em: 2011
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6. Efeitos dos macroconsumidores (peixes e camarões) sobre a assembléia de insetos aquáticos e na taxa de degradação de folhas em riachos de floresta de terra firme, Amazônia central
Este trabalho teve como objetivo verificar os potenciais efeitos sobre a assembléia de insetos aquáticos e degradação de folhas causados pela exclusão de macroconsumidores (peixes e camarões). A diminuição na taxa de degradação e o aumento na abundância de alguns táxons eram esperadas na ausência de macroconsumidores, como observado em outros es
Publicado em: 2006
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7. Changes in Chloroplast mRNA Stability during Leaf Development.
During spinach leaf development, chloroplast-encoded mRNAs accumulate to different steady-state levels. Their relative transcription rates alone, however, cannot account for the changes in mRNA amount. In this study, we examined the importance of mRNA stability for the regulation of plastid mRNA accumulation using an in vivo system to measure mRNA decay in i
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8. Use of Protein in Extraction and Stabilization of Nitrate Reductase 1
The in vitro instability of nitrate reductase (EC 1.6.6.1) activity from leaves of several species of higher plants was investigated. Decay of activity was exponential with time, suggesting that an enzyme-catalyzed reaction was involved. The rate of decay of nitrate reductase activity increased as leaf age increased in all species studied. Activity was relat
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9. Nitrate Reductase Activity and Polyribosomal Content of Corn (Zea mays L.) Having Low Leaf Water Potentials 1
Desiccation of 8- to 13-day-old seedlings, achieved by withholding nutrient solution from the vermiculite root medium, caused a reduction in nitrate reductase activity of the leaf tissue. Activity declined when leaf water potentials decreased below −2 bars and was 25% of the control at a leaf water potential of −13 bars. Experiments were conducted to det
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10. Diffusion Mechanism for Phyllotaxis: Theoretical Physico-Chemical and Computer Study
The mechanism for leaf position determination by the diffusion of an inhibitor has been studied in relation to the geometry of leaf positions. A computer model has been constructed for the inhibitor-diffusion process on a cellular cylindrical surface. The behavior of the model has been analyzed mathematically. The main results are: (a) that our model generat
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11. Persistent Photoreversibility of Leaf Development 1
Far red light reversal of red light induced leaf expansion and enzyme changes were investigated in seedlings of Phaseolus vulgaris var. Black Valentine. In etiolated plants growth, anthocyanin accumulation and increases in glyceraldehyde-3-phosphate dehydrogenase and glycolic acid oxidase activities induced by a 10 min red irradiation were stopped by a 7 min
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12. mRNA decay in spinach chloroplasts: psbA mRNA degradation is initiated by endonucleolytic cleavages within the coding region.
The expression of chloroplast genes during leaf development in higher plants is regulated on several levels as transcription, RNA processing and stability, protein stability and turnover. Differential mRNA stability is one major component which contributes to the developmentally controlled accumulation of higher plant chloroplast psbA mRNA, which encodes the