Responses of the maize plant to chromium stress with reference to antioxidation activity
AUTOR(ES)
Maiti, Saborni, Ghosh, Nirmalia, Mandal, Chiranjib, Das, Kingsuk, Dey, Narottam, Adak, Malay Kumar
FONTE
Braz. J. Plant Physiol.
DATA DE PUBLICAÇÃO
2012-09
RESUMO
Two maize varieties, viz. Sartaj and Deccan, have been evaluated according to their responses to chromium (Cr) in terms of specific physiological and biochemical attributes. During the exposure to Cr concentration (0, 50, 100, 200 and 300 µM) of potassium dichromate (K2Cr2O7) for seven days, significant changes of oxidative stress in terms of lipid peroxidation and protein oxidation were recorded along with other antioxidative pathways. It is revealed that irrespective of varieties, Sartaj was more prone to oxidative stress since the amount of superoxide due to Cr exposure was found to be significant, unlike the second variety, Deccan. In addition, for Sartaj the activity of NAD(P)H oxidase recorded a significant linear increase in a dose response manner.The changes of antioxidative enzymes recorded significant variation in both varieties under stress compared to control. However, Deccan maintains a consistent up regulation in SOD and GPX activities. Contrarily, APX activity was less sensitive to both varieties. The activation of antioxidative mechanisms due to the impact of Cr-induced oxidative stress has been described subsequently. The results deriving from this investigation might be effective for the selection of tolerant plant types under chromium contamination.
Documentos Relacionados
- Sensitivity of Photosynthesis in a C4 Plant, Maize, to Heat Stress
- Studies of a Telocentric Chromosome in Maize with Reference to the Stability of Its Centromere
- RESPONSES OF THE BEAN PLANT TO CALCIUM DEFICIENCY
- THE INFLUENCE OF ONE ION ON THE ACCUMULATION OF ANOTHER BY PLANT CELLS WITH SPECIAL REFERENCE TO EXPERIMENTS WITH NITELLA*
- Activation of an AP1-Like Transcription Factor of the Maize Pathogen Cochliobolus heterostrophus in Response to Oxidative Stress and Plant Signals