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	Provedor de dados Ciência Rural (3) Bragantia (1) Autor Corniani,Natália (4) Cechin,Inês (3) Fumis,Terezinha de Fátima (3) Araldi,Rosilaine (1) Carbonari,Caio Antonio (1) Cardoso,Guilherme Sementili (1) Cataneo,Ana Catarina (1) Girotto,Marcelo (1) Gonzalez,Gisely Cristina (1) Silva,Ilca Puertas de Freitas e (1) Tropaldi,Leandro (1) Velini,Edivaldo Domingues (1) Mais... Palavra-chave Photosynthesis (3) Antioxidant enzymes (2) Malondialdehyde (2) Antioxidants (1) Digitaria ciliaris (Retz.) Koel (1) Digitaria horizontalis Willd (1) Digitaria nuda Schumach (1) Growth (1) Helianthus annuus (1) Lipid peroxidation (1) Peroxidation (1) Proline (1) Reactive oxygen species (1) Rehydration (1) Taxa de transporte de elétrons (ETR) (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2018 (1) 2015 (2) 2010 (1) País Brazil (4) Idioma Inglês (3) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Detecção da tolerância de diferentes espécies de capim-colchão a herbicidas inibidores do fotossistema II utilizando a técnica da fluorescência Ciência Rural Tropaldi,Leandro; Velini,Edivaldo Domingues; Carbonari,Caio Antonio; Araldi,Rosilaine; Corniani,Natália; Girotto,Marcelo; Silva,Ilca Puertas de Freitas e. Este estudo teve como objetivo investigar a tolerância ou susceptibilidade das espécies de capim-colchão (Digitaria ciliaris, D. horizontalis e D. nuda) a herbicidas inibidores do fotossistema II (FSII), por meio da técnica da fluorescência, utilizando a taxa de transferência de elétrons do FSII como indicador. Para isso, foi conduzido um experimento em esquema fatorial 3x6, com três espécies de capim-colchão e seis tratamentos (ametryn, hexazinone, diuron+hexazinone, amicarbazone, diuron, tebuthiuron e testemunha) aplicados em pós-emergência. Foi monitorada a taxa de transporte de elétrons (ETR) do FSII em intervalos de tempo crescente e aferida a massa seca das plantas aos 21 dias após a aplicação. A partir dos dados da ETR, calculou-se um valor numérico... Tipo: Info:eu-repo/semantics/article Palavras-chave: Digitaria ciliaris (Retz.) Koel; Digitaria horizontalis Willd; Digitaria nuda Schumach; Taxa de transporte de elétrons (ETR). Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000500767 Differential responses between mature and young leaves of sunflower plants to oxidative stress caused by water deficit Ciência Rural Cechin,Inês; Corniani,Natália; Fumis,Terezinha de Fátima; Cataneo,Ana Catarina. The effects of water stress and rehydration on leaf gas exchange characteristics along with changes in lipid peroxidation and pirogalol peroxidase (PG-POD) were studied in mature and in young leaves of sunflower (Helianthus annuus L.), which were grown in a greenhouse. Water stress reduced photosynthesis (Pn), stomatal conductance (g s), and transpiration (E) in both young and mature leaves. However, the amplitude of the reduction was dependent on leaf age. The intercellular CO2 concentration (Ci) was increased in mature leaves but it was not altered in young leaves. Instantaneous water use efficiency (WUE) in mature stressed leaves was reduced when compared to control leaves while in young stressed leaves it was maintained to the same level as the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Photosynthesis; Antioxidant enzymes; Lipid peroxidation; Rehydration; Helianthus annuus. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000600008 Nitric oxide reduces oxidative damage induced by water stress in sunflower plants Bragantia Cechin,Inês; Cardoso,Guilherme Sementili; Fumis,Terezinha de Fátima; Corniani,Natália. Drought is one of the main environmental constraints that can reduce plant yield. Nitric oxide (NO) is a signal molecule involved in plant responses to several environmental stresses. The objective of this study was to investigate the cytoprotective effect of a single foliar application of 0, 1, 10 or 100 µM of the NO donor sodium nitroprusside (SNP) in sunflower plants under water stress. Water stressed plants treated with 1μM SNP showed an increase in the relative water content compared with 0 μM SNP. Drought reduced the shoot dry weight but SNP applications did not result in alleviation of drought effects. Neither drought nor water stress plus SNP applications altered the content of photosynthetic pigments. Stomatal conductance was reduced by drought... Tipo: Info:eu-repo/semantics/article Palavras-chave: Photosynthesis; Reactive oxygen species; Antioxidant enzymes; Proline; Malondialdehyde. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000200200 The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status Ciência Rural Cechin,Inês; Gonzalez,Gisely Cristina; Corniani,Natália; Fumis,Terezinha de Fátima. ABSTRACT: Interaction effects between nitrogen and UV-B radiation were studied in sunflower (Helianthus annuus L. variety IAC-Iarama) plants grown in a greenhouse under natural photoperiod conditions. Plants were irradiated with 0.8W m-2 (control) or 8.0W m-2 (+UV-B) of UV-B radiation for 7h per day. The plants were grown in pots containing vermiculite and watered with 70% of full strength nitrogen-free Long Ashton solution, containing either low (42.3ppm) or high (282ppm) nitrogen as ammonium nitrate. High nitrogen increased dry matter of stem, leaves and shoot, photosynthetic pigments and photosynthesis (A) without any alteration in stomatal conductance (gs) nor transpiration (E) while it reduced the intercellular CO2 (Ci) concentration, and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidants; Growth; Malondialdehyde; Peroxidation; Photosynthesis. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200251 Registros recuperados: 4 Primeira ... 1 ... Última

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