Institution
Universidade Federal de Viçosa
Education•Viçosa, Brazil•
About: Universidade Federal de Viçosa is a education organization based out in Viçosa, Brazil. It is known for research contribution in the topics: Population & Dry matter. The organization has 16012 authors who have published 26711 publications receiving 353416 citations.
Topics: Population, Dry matter, Germination, Species richness, Soil water
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this paper, the depithed bagasse was chemically characterized and converted into brown pulp of two different extents of delignification degrees (kappa 16.9 and 9.2) by the pre-hydrolysis soda process.
81 citations
••
TL;DR: The toxicity (and thus the selectivity) of deltamethrin against both mite species: the southern red mite and its phytoseid predator Amblyseius herbicolus was assessed and it was indicated that predator susceptibility to deltAMethrin is not a cause of the reported outbreaks.
81 citations
••
TL;DR: In this paper, a retencao de agua dos horizontes superficiais dos solos estudados foi positivamente correlacionada with os teores de argila e carbono orgânico.
Abstract: Com o intuito de avaliar diferencas de comportamento entre solos das superficies geomorficas Sul-Americana e Velhas da regiao dos Cerrados, todos sob uso atual de cobertura vegetal nativa, foram realizadas caracterizacoes fisicas, quimicas e mineralogicas, bem como feitas analises de componentes principais desses atributos. Com os solos referenciados por sub-regiao e pela superficie geomorfica que representam, tres agrupamentos foram constituidos: Grupo 1: solos de textura argilosa a muito argilosa e hipo a mesoferricos; Grupo 2: solos de textura media a arenosa e hipoferricos; e Grupo 3: solos de textura argilosa a muito argilosa e ferricos. A retencao de agua dos horizontes superficiais dos solos estudados foi positivamente correlacionada com os teores de argila e carbono orgânico. Os solos do Grupo 3 apresentaram a maior oferta de bases trocaveis dos horizontes superficiais, o que foi relacionado, em grande parte, com a maior reciclagem imposta pela formacao florestal local, quando comparada a da formacao de cerrado, presente em 31 dos 33 perfis de solos dos Grupos 1 e 2. O Grupo 3, diferenciado pelos elevados teores de Fe herdados do material de origem, e o grupo mais homogeneo em termos mineralogicos, com todos os perfis hematiticos. Os Grupos 1 e 2 apresentam sobreposicao de composicao mineralogica, sendo o Grupo 1, em termos medios, mais gibbsitico do que o Grupo 2. A maior eficacia do Sistema Brasileiro de Classificacao de Solos, relativamente ao Soil Taxonomy, em discriminar os solos estudados e resultante do uso do carater ferrico concomitantemente a outros atributos comuns aos dois sistemas. A analise de componentes principais auxiliou no entendimento das diferencas e similaridades dos ambientes pedologicos separados no campo.
81 citations
••
TL;DR: Jasmonate-dependent resistance is reduced rather than enhanced through the suppression of glucose and fructose concentrations, which may contribute to the evolution of divergent resistance strategies of plants in nature.
Abstract: Summary
Jasmonates regulate plant secondary metabolism and herbivore resistance. How they influence primary metabolites and how this may affect herbivore growth and performance are not well understood.
We profiled sugars and starch of jasmonate biosynthesis-deficient and jasmonate-insensitive Nicotiana attenuata plants and manipulated leaf carbohydrates through genetic engineering and in vitro complementation to assess how jasmonate-dependent sugar accumulation affects the growth of Manduca sexta caterpillars.
We found that jasmonates reduce the constitutive and herbivore-induced concentration of glucose and fructose in the leaves across different developmental stages. Diurnal, jasmonate-dependent inhibition of invertase activity was identified as a likely mechanism for this phenomenon. Contrary to our expectation, both in planta and in vitro approaches showed that the lower sugar concentrations led to increased M. sexta growth. As a consequence, jasmonate-dependent depletion of sugars rendered N. attenuata plants more susceptible to M. sexta attack.
In conclusion, jasmonates are important regulators of leaf carbohydrate accumulation and this determines herbivore growth. Jasmonate-dependent resistance is reduced rather than enhanced through the suppression of glucose and fructose concentrations, which may contribute to the evolution of divergent resistance strategies of plants in nature.
81 citations
••
TL;DR: The results suggest that the conversion of ATP, a molecule with pro-inflammatory activity, into adenosine, which possesses immunomodulatory properties, may contribute to the establishment of infection by Leishmania.
81 citations
Authors
Showing all 16194 results
Name | H-index | Papers | Citations |
---|---|---|---|
José A. Teixeira | 101 | 1414 | 47329 |
J. Alfredo Martínez | 82 | 642 | 24009 |
Andrew J. Davison | 78 | 240 | 22171 |
David H. Bromwich | 75 | 291 | 21688 |
Takeji Nishikawa | 59 | 408 | 14727 |
Thierry Candresse | 59 | 403 | 11833 |
Raul Narciso C. Guedes | 55 | 378 | 10668 |
Matthias Erb | 54 | 166 | 8599 |
Arne Janssen | 53 | 179 | 8315 |
Paulo R. Guimarães | 52 | 162 | 10206 |
Antonio Reverter | 52 | 233 | 7259 |
Adriano Nunes-Nesi | 52 | 157 | 8453 |
Fermín I. Milagro | 51 | 245 | 9281 |
Svetoslav Dimitrov Todorov | 51 | 210 | 7072 |
Marcos Heil Costa | 50 | 124 | 9660 |