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| Agarwal,Sheela; Shaheen,Robina. |
| The purpose of the present work was to evaluate both the antioxidant response system and oxidative stress in leaves from bitter gourd (Momordica charantia L) subjected to NaCl, UV-B and water stresses at three different stages of plant growth: pre-flowering, flowering and post-flowering. Except for peroxidase (POX), all enzyme activities including superoxide dismutase (SOD), catalase (CAT), polyphenol oxidase (PPO), glutathione reductase (GR), as well as concentrations of ascorbate (ASA), hydrogen peroxide (H2O2) and thiobarbituric acid reactive substances (TBARS) exhibited maximum values at the flowering stage under all three stresses. All the enzyme activities, SOD, CAT, POX, PPO, GR and the concentrations of ASA, H2O2 and TBARS were elevated under NaCl... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidative enzymes; Environmental stresses; H2O2; Ion concentration; Thiobarbituric acid-reactive substances. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000200007 |
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| Lacerda,Claudivan F.; Assis Júnior,José O.; Lemos Filho,Luiz C. A.; Oliveira,Teógenes S. de; Guimarães,Francisco V.A.; Gomes-Filho,Enéas; Prisco,José T.; Bezerra,Marlos A.. |
| The effect of salt stress of known intensity and duration on morpho-physiological changes in leaves of different ages from cowpea [Vigna unguiculata (L.) Walp.] plants was studied, aiming for a better understanding of the acclimation process of the whole-plant. Seeds were sown in vermiculite and seedlings were transferred to plastic trays containing aerated nutrient solution, and kept in a greenhouse. When the first trifoliate leaf emerged the seedlings were transplanted into 3 L plastic pots containing aerated nutrient solution. Salt additions started 5 d later, and the salt-treated plants received 25 mmol L-1 per day until reaching a final concentration of 75 mmol L-1. During the experimental period primary leaves and the 1st, 2nd, and 3rd trifoliate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ion concentration; Photosynthate partitioning; Photosynthesis; Salinity; Stress acclimation. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000400003 |
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