TAILIEUCHUNG - Oxidative stress and antioxidant defense mechanism in mung bean seedlings after lead and cadmium treatments

This research was an attempt to study the effect of heavy metals lead and cadmium ( mM and mM) on growth and antioxidant enzymes of seedlings of 2 mung bean genotypes (NM 19-19 and Azri mung-2006). Results revealed that germination percentage and seedling length decreased when compared with the control for both genotypes. | Turkish Journal of Agriculture and Forestry Research Article Turk J Agric For (2014) 38: 55-61 © TÜBİTAK doi: Oxidative stress and antioxidant defense mechanism in mung bean seedlings after lead and cadmium treatments Meher HASSAN, Simeen MANSOOR* Department of Genetics, University of Karachi, Karachi, Pakistan Received: Accepted: Published Online: Printed: Abstract: This research was an attempt to study the effect of heavy metals lead and cadmium ( mM and mM) on growth and antioxidant enzymes of seedlings of 2 mung bean genotypes (NM 19-19 and Azri mung-2006). Results revealed that germination percentage and seedling length decreased when compared with the control for both genotypes. However, seedling length and germination percentage was better in NM 19-19 as compared to Azri mung-2006. Elevated levels of protein were observed under metal stress in both genotypes. Heavy metals induced oxidative stress in plants, causing membrane injury as observed by enhanced level of malondialdehyde (MDA) contents. Increase in antioxidant enzymes activity was detected for guaiacol peroxidase (GPX) and catalase (CAT). However, ascorbate (APX) activity decreased under stress for both genotypes. We observed more MDA content and GPX and APX activity in Azri mung-2006 as compared to NM 19-19 when high concentrations of Pb and Cd were added. This revealed that NM 19-19 was tolerant whereas Azri mung-2006 was sensitive to Pb and Cd. It was further noticed that Cd imposed a more deleterious effect than Pb on both genotypes. Key words: Ascorbate peroxidase, cadmium, catalase, guaiacol peroxidase, lead, malondialdehyde 1. Introduction Human activities such as industrial production, mining, agriculture, and transportation release high amounts of heavy metals, which pollute agricultural land in developed as well as developing countries. These metals get absorbed by the .

• Nông nghiệp
• Ascorbate peroxidase
• Guaiacol peroxidase
• Antioxidant enzymes
• Bean genotypes
• Lead and cadmium treatments
• BMC Plant Biology
• Drought stress
• Abiotic stress
• Superoxide dismutase
• Non enzymatic antioxidants
• Manihot esculenta Crantz
• Cytosolic superoxide dismutase
• Cytosolic ascorbate peroxidase
• Reactive oxygen species scavenging
• Abiotic stress resistance
• Stress condition
• Tomato (Solanum lycopersicum Mill)
• Superoxide dismutasegenes alteration
• Phytophthora blight
• Susceptible variety of sesame
• Report medicine
• traditional medicine
• scientific reports
• medicine
• cell proliferation
• oxidation
• molecular Biology
• tumor cells
• Antimicrobial
• medical knowledge
• medical research
• analysis of cytoplasmic
• immune system
• biosynthesis
• Glutathione reductase
• High temperature
• Photosynthetic performance index
• UV B irradiation
• Relative water content
• Cucumber Cucumis sativus L
• Total chlorophyll content
• Cucumber seedlings
• Weak light stresses
• Enhance cucumber tolerance
• Electrical conductivity
• Antioxidant system
• Lipid peroxidation
• Iron superoxide dismutase
• Ascorbate dependent peroxidase
• Total carotenoid
• Melia azadirachta indica
• Sugar beet
• Gas exchange
• Pea Pisum sativum L
• Chlorophyll fluorescence kinetics
• Drought tolerance
• Phaseolus vulgaris
• Soybean genotypes
• Plant Biology
• Sugarcane mosaic virus
• Reactive oxygen species
• Infectious pathogens
• Crop yield
• Egyptian clover
• Root growth
• Al uptake
• Zea mays
• Maternal effect
• Physiological quality
• Genes influenced