Allelopathic
Mostrando 13-24 de 80 artigos, teses e dissertações.
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13. Aqueous plant extracts in the control of Bidens pilosa L.
RESUMO: Compostos secundários têm ação alelopática sobre a germinação, crescimento e desenvolvimento inicial de plântulas, e a Bidens pilosa pode ter sua germinação e crescimento afetados pela ação dos extratos alelopáticos. Nesse sentido, objetivou-se avaliar o potencial alelopático de extratos de braquiária (Brachiaria brizantha), girassol (
Arq. Inst. Biol.. Publicado em: 14/01/2019
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14. Erratum: Allelopathic Effect of Santa Maria (Parthenium hysterophrous) Mulch on Growth and Yield of Soybean (Glycine max)
Planta daninha. Publicado em: 30/07/2018
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15. N deposition affects allelopathic potential of Amaranthus retroflexus with different distribution regions
ABSTRACT This study aims to determine the allelopathic potential of Amaranthus retroflexus (Ar) with different climatic zones on seed germination and growth of A. tricolor (At) treated with a gradient N addition. Ar leaf extracts only displayed significantly allelopathic potential on the underground growth of Ar but not the aboveground growth of At. The alle
An. Acad. Bras. Ciênc.. Publicado em: 2017-06
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16. Special metabolites isolated from Urochloa humidicola (Poaceae)
ABSTRACT This study aims to identify special metabolites in polar extracts from Urochloa humidicola (synonym Brachiaria humidicola) that have allelopathic effects and induce secondary photosensitization in ruminants. The compounds were isolated and identified via chromatographic and spectroscopic techniques. The compounds 4-hydroxy-3-methoxy-benzoic acid, tr
An. Acad. Bras. Ciênc.. Publicado em: 2017-06
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17. Food quantity and quality of cassava affected by leguminous residues and inorganic nitrogen application in a soil of low natural fertility of the humid tropics
ABSTRACT The aim of this study was to test the hypothesis that the quality and quantity of biofortified cassava root in a humid tropical environment can be modified with the application of a combination of low- and high-quality residues of leguminous tree species. The experiment was designed as a 6 × 2 factorial (a combination of 4 legume species versus 2 l
Bragantia. Publicado em: 29/05/2017
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18. Allelopathic suppression by Conyza canadensis depends on the interaction between latitude and the degree of the plant’s invasion
ABSTRACT Allelopathic suppression of the growth of co-occurring plant species in invaded ecosystems is an important factor in some plant invasions. This study uses leaf extracts of the invasive plant species Conyza canadensis to determine its allelopathic effects along a latitudinal gradient, and under different cover classes and degrees of invasion, on seed
Acta Bot. Bras.. Publicado em: 02/05/2017
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19. Potential allelopathic and antibacterial activity from Alternanthera philoxeroides
RESUMO Alternanthera philoxeroides é uma espécie promissora na busca de novas moléculas com efeitos biológicos. Para acelerar este processo, os métodos de escolha, tal como o teste de alelopatia em sementes e técnica de disco de difusão em bactérias, é indispensável. O objetivo deste estudo foi avaliar os efeitos alelopáticos de extratos de A. phi
Hoehnea. Publicado em: 2016-12
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20. Benzoxazinoids: Reactivity and Modes of Action of a Versatile Class of Plant Chemical Defenses
In order to protect themselves from biotic stresses, including enemies and competitors, many plants recruit defensive secondary metabolites. Compounds containing a 2-hydroxy-2H-1,4-benzoxazin-3(4H)-one skeleton and their derivatives, collectively known as benzoxazinoids, are common secondary metabolites in many grasses, including important cereal crops such
J. Braz. Chem. Soc.. Publicado em: 2016-08
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21. 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
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22. 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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23. The effects of an exotic palm on a native palm during the first demographic stages: contributions to ecological management
Biological invasions have negative impacts on native biota and consequently on biodiversity. In patches of Atlantic Forest in Brazil, the Australian palm tree Archontophoenix cunninghamiana has become invasive, whereas the endemic palm Euterpe edulis is threatened with extinction. The two species occupy parts of the same functional niche within the forests,
Acta Bot. Bras.. Publicado em: 2014-12
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24. Allelopathic effects of Sonchus oleraceus L. on the germination and seedling growth of crop and weed species
We assessed the allelopathic effects of the aqueous extract of Sonchus oleraceus dry shoots on the germination and seedling growth of Trifolium alexandrinum, three weed species (Brassica nigra, Chenopodium murale and Melilotus indicus) and S. oleraceus itself. We assayed four different concentrations of the aqueous extract (w v-1): 1%, 2%, 3% and 4%. To dete
Acta Bot. Bras.. Publicado em: 2014-09