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| Registros recuperados: 23 | |
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| Arcoverde,Gabriela B.; Rodrigues,Bruno M.; Pompelli,Marcelo F.; Santos,Mauro G.. |
| Stomatal conductance (g s), transpiration (E), relative water content (RWC), superoxide dismutase activity (SOD), malondialdehyde (MDA), leaf carbohydrate soluble (LCS), free amino acids (FAA) and total protein (TP) content were measured under mild and severe drought stress in young potted Jatropha curcas L. in the greenhouse. The plants were kept for 12 days under three different water regimes, control (well hydrated), 50% irrigation control (mild stress) and 25% (severe stress), after rehydration were measured on the second and fourth day. Both mild and severe stress decreased g s and E; however, only severe stress reduced LCS, FAA and TP content and increased SOD activity (70%) and MDA content (60%) compared with the control. Moreover, under these... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiesel; Drought tolerance; MDA; Oxidative stress; ROS; Water deficit. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000200004 |
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| Barbosa,Marta Ribeiro; Silva,Marina Medeiros de Araújo; Willadino,Lilia; Ulisses,Claudia; Camara,Terezinha Rangel. |
| As condições de estresse biótico e abiótico impostas às plantas induzem a superprodução de espécies reativas de oxigênio (ROS), podendo causar danos às estruturas celulares e mesmo acarretar a morte da planta. As respostas bioquímicas e fisiológicas de plantas superiores ao estresse oxidativo incluem um eficiente sistema de defesa antioxidante, que envolve a atividade das enzimas superóxido dismutase, catalase, ascorbato peroxidase, peroxirredoxinas, dentre outras, além de metabólitos não enzimáticos, que, de forma conjunta, atuam na eliminação das ROS e na redução do dano oxidativo. Nesta revisão, serão abordados os principais sítios de produção de ROS e a ação de algumas enzimas do sistema de defesa antioxidante em plantas. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ROS; Peróxido de hidrogênio; Radical superóxido; Enzimas antioxidantes. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000300011 |
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| Morais,Marciana Bizerra de; Camara,Terezinha Rangel; Ulisses,Cláudia; Carvalho Filho,José Luiz Sandes; Willadino,Lilia. |
| ABSTRACT: The exposure of plants to multiple stress conditions can cause over production of reactive oxygen species promoting an imbalance in the redox system. The aim of this study was to examine the antioxidant response from varieties of sugarcane under adverse conditions, to understand the defense mechanisms of tolerant and sensitive genotypes. Micropropagated sugarcane of six genotypes, RB966928, RB98710, RB855453, RB99395, RB867515, and RB855156, were subjected to isolated action of high-temperature stress and a combination of water and saline stress, and effects were evaluated. Activities of enzymes such as superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX), as well as stress indicators such as lipid peroxidation (MDA content)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant enzyme; Abiotic stress; Saccharum; ROS. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400201 |
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| Registros recuperados: 23 | |
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