7 documents found, page 1 of 1
Leaf structural traits of tropical woody species resistant to cement dust
Siqueira-Silva, Advanio Inácio; Pereira, Eduardo Gusmão; Modolo, Luzia Valentina; Paiva, Elder Antonio SousaCement industries located nearby limestone outcrops in Brazil have contributed to the coating of cement dust over native plant species. However, little is known about the extent of the response of tropical woody plants to such environmental pollutant particularly during the first stages of plant development and establishment. This work focused on the investigation of possible alterations in leaf structural and ...
Quinolines: Microwave-assisted synthesis and their antifungal, anticancer and r...
Liberto, Natália Aparecida; Simões, Juliana Baptista; Silva, Sarah de Paiva; Fernandes, Sergio Antonio; Silva, Cristiane Jovelina daAn efficient method for the synthesis of quinolines using microwave irradiation was developed providing 28 quinolines with good yields. The reaction procedures are environmentally friendly, convenient, mild and of easy work-up. Quinolines were evaluated for their antifungal, anticancer and antioxidant properties and exhibited high activities in all tests performed.
Salinity-induced accumulation of endogenous H2S and NO is associated with modul...
Silva, Cristiane Jovelina da; Fontes, Elizabeth Pacheco Batista; Modolo, Luzia ValentinaSalinity is one of the abiotic factors that most affect crop growth and production. This study focused on the effect of high salinity on the endogenous levels of the signaling molecules hydrogen sulfite (H2S) and nitric oxide (NO) in Nicotiana tabacum leaves and the extent of these for the biochemically-driven plant tolerance to such abiotic stress. The NaCl treatment for 10 days led to an expressive augment of...
Impact of cement dust pollution on Cedrela fissilis Vell. (Meliaceae): A potent...
Siqueira-Silva, Advanio Inácio; Pereira, Eduardo Gusmão; Modolo, Luzia Valentina; Lemos-Filho, José Pires; Paiva, Elder Antonio SousaConsidering the impacts caused to vegetation in the vicinity of cement factories, the aim of this study was to evaluate the impacts of cement dust on the structural organization and physiological/biochemical traits of Cedrela fissilis leaflets, a woody species native to tropical America. Plants were exposed to 2.5 or 5 mg cm–2 cement dust applied to the leaf surface, to the soil or simultaneously to the leaf su...
Physiological traits and antioxidant metabolism of leaves of tropical woody spe...
Siqueira-Silva, Advanio Inácio; Pereira, Eduardo Gusmão; Lemos-Filho, José Pires de; Modolo, Luzia Valentina; Paiva, Elder Antonio SousaTropical woody species occurring in limestone outcrops are frequently exposed to particulate material from cement factories. The effects of 60-day cement dust exposure on physiological traits and enzymatic antioxidant system of young plant leaves of Guazuma ulmifolia Lam., Myracrodruon urundeuva Allemão and Trichilia hirta L. were investigated. Cement dust (2.5 or 5 mg cm−2) was applied to the leaf surface or s...
Produção de oxido nitrico pela oxido nitrico sintase, nitrato redutase e uma at...
Modolo, Luzia ValentinaOrientador: Ione Salgado; Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia; Resumo: A origem do óxido nítrico (?NO) em plantas tem sido controversa e uma enzima do tipo óxido nítrico sintase (NOS), bem como nitrato redutase (NR) são consideradas possíveis fontes deste radical livre. Contudo, ainda não há nenhuma evidência direta da formação de ?NO a partir da NR durante interações pla...
Produção de flavonoides e atividade oxido nitrico sintase na resposta de defesa...
Modolo, Luzia ValentinaOrientador: Ione Salgado; Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia; Resumo: O presente trabalho analisou a participação da enzima óxido nítrico sintase (NOS) na produção de fitoalexinas, como parte do mecanismo de defesa de soja ao ataque do fungo Diaporthe phaseolorum f. sp. meridionalis (Dpm), causador da doença do cancro da haste. A produção de fitoalexinas e a ativid...