Phytotoxic Compounds
Mostrando 1-12 de 18 artigos, teses e dissertações.
-
1. Synthesis of Glycerol-Derived 4-Alkyl-Substituted 1,2,3-Triazoles and Evaluation of Their Fungicidal, Phytotoxic, and Antiproliferative Activities
Herein, the synthesis of nine novel glycerol-derived 4-alkyl-substituted 1,2,3-triazoles, using the CuI-catalyzed alkyne-azide cycloaddition reaction as the key step, is reported. The triazoles were characterized by infrared and nuclear magnetic resonance (NMR 1H and 13C) spectroscopy and mass spectrometry. The nine prepared compounds were evaluated with reg
J. Braz. Chem. Soc.. Publicado em: 2020-04
-
2. PHYTOTOXIC CONSTITUENTS FROM ENDOPHYTIC FUNGUS Xylaria cubensis ASSOCIATED WITH Eugenia brasiliensis
The upscaling of Xylaria cubensis, an endophyte of Eugenia brasiliensis (Myrtaceae), in PDB medium led to the isolation of known compounds including cytochalasin D (7) and cytochalasin C (8), which exhibited relatively higher phytotoxic activity in all the concentrations tested compared to the commercial herbicide GOAL®. Besides the aforementioned metabolit
Quím. Nova. Publicado em: 18/07/2019
-
3. Triterpenoides, fenólicos e efeito fitotóxico das folhas de Eugenia flavescens DC (Myrtaceae)
This research deals with the chemical study and evaluation of the phytotoxic effects of the methanol extract of E. flavescens leaves. The compounds were isolated using classic chromatographic techniques and the identification of the phenolic profile was proposed from the HPLC/DAD/MS-MS data. Structure elucidation of the compounds was performed by 1H and 13C
Quím. Nova. Publicado em: 2017-04
-
4. Selection, isolation, and identification of fungi for bioherbicide production
Abstract Production of a bioherbicide for biological control of weeds requires a series of steps, from selection of a suitable microbial strain to final formulation. Thus, this study aimed to select fungi for production of secondary metabolites with herbicidal activity using biological resources of the Brazilian Pampa biome. Phytopathogenic fungi were isolat
Braz. J. Microbiol.. Publicado em: 2017-03
-
5. Phytotoxicity of Perlatolic Acid and Derivatives
ABSTRACT Perlatolic acid (1), methyl perlatolate (2), and the products of perlatolic acid alcoholysis-namely, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, and n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (3-11)-were evaluated for their herbicidal potential on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. Th
Braz. arch. biol. technol.. Publicado em: 01/08/2016
-
6. Seasonal variation in allelopathic potential of the leaves of Copaifera langsdorffii Desf.
ABSTRACT The deciduous plant Copaifera langsdorffii contains important medicinal compounds which may also be allelopathic and inhibitory to plant growth. The species is endemic to the Brazilian Cerrado where there is pronounced climatic seasonality. In this study we demonstrate the allelopathic capacity of extracts from the leaves of C. langsdorffii and pre-
Acta Bot. Bras.. Publicado em: 15/03/2016
-
7. Phytotoxic activity of crude aqueous extracts and fractions of young leaves of Sapindus saponaria L. (Sapindaceae)
The aim of this study was to evaluate the phytotoxic potential of aqueous extract of young leaves of Sapindus saponaria L. (soapberry) on the diaspore germination and seedling growth Lactuca sativa L. (lettuce) and Allium cepa L. (onion), as well as to determine, by bioassay-guided fractioning, whether the fractionated extracts of those leaves are phytotoxic
Acta Bot. Bras.. Publicado em: 2013-03
-
8. 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
-
9. Encapsulamento de moléculas bioativas com calix[n]arenos e avaliação da atividade fitotóxica de complexos de inclusão com aldiminas / Encapsulation of bioactive molecules with calix[n]arenes and evaluation of phytotoxic activity the inclusion complexes with aldimines
This research had as main objective to study intermolecular interactions using 1H NMR as major tool. The first chapter describes the synthesis of six molecules, two of them employed as molecular hosts: p-sulphonic acid calix[6]arene (SO3HCX[6]) (3) and p-sulphonic acid calix[4]arene (SO3HCX[4]) (6). The calixarenes synthesized were employed in the encapsulat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/07/2009
-
10. Pós-colheita de nêspera Fukuhara: efeito de compostos salicilados, 1-metilciclopropeno e tratamentos térmicos / Postharvest of loquat fruit Fukuhara: effect of salicylate compounds, 1-methylcyclopropene and heat treatments
The aim of this work was to develop new techniques to improve the loquat fruit Fukuhara conservation, avoiding juiciness loss, increase in firmness and pulp internal browning. For this, allow to cold storage the application of salicilate compounds, 1- methylcyclopropene and temperature conditioning. In the first experiment four concentration of salicylic aci
Publicado em: 2009
-
11. Phytotoxic and antifungal compunds from legume seeds that accumulate glactomannan and xyloglucan as cell wall storage polysacharides / Substancias fitotoxicas e antifungicas em sementes de leguminosas que acumulam gelactomanano e xiloglucano como carboidratos de reservas de parede celular
Sesbania virgata (Cav.) Pers. and Hymenaea courbaril L. var. stilbocarpa (Fabaceae) are two tropical legume species with seeds that contain galactomannan and xyloglucan, respectively, as seed storage polysaccharides, which are broken down after germination, generating large amounts of monosaccharides and oligosaccharides. Part of these sugars is released to
Publicado em: 2008
-
12. Síntese e avaliação das atividades fitotóxicas e citotóxicas de compostos análogos aos nostoclídeos
The nostoclides are produced by a cyanobacterium Nostoc sp. symbiont of Peltigera canina, and belong to a family of compounds know as -alkylidenebutenolides. Nostoclides have been shown to have moderate cytotoxicity against the mouse neuroblastoma cell lines Neuro-2a CCL and KB CCL 17. Due to the fact that Peltigera canina cultures are usually not contaminat
Publicado em: 2008