Phytotoxins
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Phytotoxins eliminated by milk: a review
RESUMO: O leite é uma mistura complexa de lipídeos suspensos em solução aquosa de proteínas e pode ser veículo de diversos contaminantes, mas, geralmente, não é uma importante via de excreção de tóxicos. O principal problema é a exposição repetida, como ocorre com a ingestão de plantas tóxicas, e seu potencial perigo para os animais que conso
Pesq. Vet. Bras.. Publicado em: 02/05/2019
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2. Flavonoid profiling and nodulation of some legumes in response to the allelopathic stress of Sonchus oleraceus L.
Annual sowthistle (Sonchus oleraceus) has been reported to produce allelopathic effects. Two greenhouse experiments were conducted to estimate the allelopathic potential of both plant residue and root exudates of S. oleraceus on flavonoid composition and nodulation in a leguminous crop, Trifolium alexandrinum, and in two leguminous weeds, Melilotus indicus a
Acta Bot. Bras.. Publicado em: 2015-12
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3. Phytotoxic effects of metabolites from Alternaria euphorbiicola against its host plant Euphorbia heterophylla
A bioassay-guided fractionation of culture filtrates of the fungus Alternaria euphorbiicola, a pathogen of the weed Euphorbia heterophylla, led to the isolation of anhydromevalonolactone (1), tyrosol (2), (R)-( - )-mevalonolactone (3), and cycloglycylproline (4). When tested on the punctured leaves of the host plant, these compounds produced bleached lesions
Quím. Nova. Publicado em: 2013
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4. Production and extraction of phytotoxins from Colletotrichum dematium FGCC# 20 effective against Parthenium hysterophorus L.
The aim of this work was to study the herbicidal potential of Cell free culture filtrate of Colletotrichum dematium FGCC#20 against Parthenium by employing different bioassays i.e. shoot-cut, seedling, detached leaf and seed germination. On solvent extraction of the Cell free culture filtrate, Ethyl acetate extracted fraction showed the presence of phytotoxi
Brazilian Archives of Biology and Technology. Publicado em: 2010-06
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5. Estudo alelopático de espécies da família Myrtaceae do cerrado
Os vegetais liberam metabolitos primarios e secundarios no ambiente que podem influenciar no desenvolvimento da vegetacao adjacente, este fenomeno de interferencia e denominado alelopatia. E reconhecida como um processo ecologico importante, pois interfere na estrutura, distribuicao, composicao e dinamica de comunidades vegetais. Estudos sobre interacoes ale
Publicado em: 2010
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6. Analysis of secondary metabolites produced by endophytic fungi associated to Cupressus lusitanica / Análise de metabólitos secundários produzidos por fungos endofíticos associados à Cupressus lusitanica
Some phytopatogenic fungi found in Cupressus species produces phytotoxins very aggressive to the host plant. Surprisingly, these toxins are diterpenoids structures, as well as some endogenus metabolites in Cupressus species. This fungi ability appears to be a specialized strategy in the association fungi-plant. These observations motivated the development of
Publicado em: 2009
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7. Phytotoxins from the pathogenic fungi Drechslera maydis and Drechslera sorghicola
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8. Pseudomonas syringae Phytotoxins: Mode of Action, Regulation, and Biosynthesis by Peptide and Polyketide Synthetases
Coronatine, syringomycin, syringopeptin, tabtoxin, and phaseolotoxin are the most intensively studied phytotoxins of Pseudomonas syringae, and each contributes significantly to bacterial virulence in plants. Coronatine functions partly as a mimic of methyl jasmonate, a hormone synthesized by plants undergoing biological stress. Syringomycin and syringopeptin
American Society for Microbiology.
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9. Animal Toxicity of Phytopathogenic Fungi
Twelve genera of phytopathogenic fungi comprising 27 species previously reported to produce phytotoxins were tested concurrently for animal and plant toxicity. There appeared to be no direct relationship between plant and animal toxicity.
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10. Some Synthetic Phytotoxins Structurally Related to Rhynchosporoside 1
The (2-O)α-d-glucopyranoside of 1,2-propanediol and [U-14C]glucose were used as substrates in a reaction with almond β-glucosidase, which resulted in the production of some (2-O)α-d-oligoglucosides of 1,2-propanediol. As its substrate, the β-glucosidase preferred the glucoside isomer that rotates plane-polarized light to the right. Some of the glucosides
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11. Bostrycin and 4-deoxybostrycin: two nonspecific phytotoxins produced by Alternaria eichhorniae.
Two crystalline red pigments with phytotoxic activity were isolated from culture filtrates of Alternaria eichhorniae, a pathogen of the water hyacinth Eichhornia crassipes. The pigments were present in the ratio of 4:1 and were identified as bostrycin and 4-deoxybostrycin, respectively. This is the first isolation of 4-deoxybostrycin from a natural source. B
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12. Phytotoxins from the pathogenic fungi Drechslera maydis and Drechslera sorghicola
Drechslera maydis, the causal agent of Southern corn leaf blight, and Drechslera sorghicola, the causal agent of leaf spot on Johnson grass, produce a series of phytotoxic sesterterpenoids. These sesterterpenoids belong to the ophiobolin family. One of them, ophiobolin I, was characterized by x-ray diffraction and served as a crucial reference compound for c