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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Potassium starvation-induced oxidative stress and antioxidant defense responses in Brassica juncea
Journal of Plant Interactions, Volume 9, No. 1, Year 2014
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Description
In this study, changes in growth, chlorophyll pigments, proline, hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents, and antioxidative enzyme activities were investigated in the seedlings of four different cultivars (cvs) of mustard [Brassica juncea (L.) Czern. & Coss.], i.e. Varuna, RH-30, Rohini, and Vaibhave under potassium (K) nutrition-deficient conditions. K deficiency induced a significant decrease in concentrations of photosynthetic pigments in all four cvs, however, this decrease was higher in cvs. Varuna and RH-30. During K deficiency, proline concentration increased in all mustard cvs, but a maximum increase in this parameter was shown by cvs. Varuna and RH-30. The activity of the key proline metabolizing enzyme γ-glutamyl kinase increased more in cvs. Varuna and RH-30 compared to cvs. Rohini and Vaibhave. The proline oxidase activity showed greater increase in cvs. Vaibhave and Rohini compared to cvs. Varuna and RH-30. K deficiency increased the concentrations of H2O2 and the activities of anti-oxidative defense system enzymes like superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) in the seedlings of all mustard cvs, but higher activities of these enzymes were observed in cvs. Varuna and RH-30 compared to cvs. Rohini and Vaibhave. A significant lipid peroxidation in terms of MDA contents was also observed in the K-deficient seedlings of all four mustard cvs. This study suggests that K-starvation-induced oxidative stress through the high generation of reactive oxygen species (ROS). All mustard cvs counteracted to some extent the effects of ROS by activation of antioxidant machinery. Overall, the results indicate that of all four mustard cvs, Varuna and RH-30 were tolerant to K deficiency. © 2012 Taylor & Francis.
Authors & Co-Authors
Koul, Parvaiz A.
Unknown Affiliation
Ashraf, Muhammad Yasin
Pakistan, Faisalabad
University of Agriculture, Faisalabad
Hakeem, Khalid Rehman
India, New Delhi
Jamia Hamdard
Azooz, Mohamed Mahgoub
Saudi Arabia, Al-ahsa
King Faisal University
Egypt, Qena
Faculty of Science
Rasool, Saiema
India, New Delhi
Jamia Hamdard
Chandna, Ruby
India, New Delhi
Nipgr
Akram, Nudrat Aisha
Pakistan, Faisalabad
The University of Faisalabad
Statistics
Citations: 80
Authors: 7
Affiliations: 6
Identifiers
Doi:
10.1080/17429145.2012.747629
ISSN:
17429145
e-ISSN:
17429153
Research Areas
Food Security