Magnesium deficiency induced oxidative stress and antioxidant responses in mulberry plants

By R. K. Tewari, Praveen Kumar, Parma Nand Sharma. 2006

173 citations recorded by the source corpus.

Abstract The aim of the study was to implicate induction of oxidative stress and antioxidative responses with the effects of Mg deficiency in mulberry plants. Mulberry (Morus alba L.) cv. Kanva-2 plants grown in hydroponics were subjected to deficiency of Mg. Mg-deficient plants developed visible symptoms—deep interveinal chlorotic mottling and necrosis in the older and middle leaves. The decreases in the dry matter yield of plants and concentrations of sugars and starch in the leaves of Mg-deficient plants are suggestive of decreased photosynthetic activity. Mg-deficiency decreased concentrations of photosynthetic pigments, and increased concentrations of H2O2 and ascorbate and activities of antioxidative enzymes—peroxidase (POD), ascorbate peroxidase (APX) and superoxide dismutase (SOD). The results suggest induction of oxidative stress by enhancing generation of ROS and inducing alterations in redox status, accompanied by activation of antioxidant machinery including induction of some new SOD isoforms in Mg-deficient mulberry plants. Despite significant increase in H2O2, lipid peroxidation was decreased in Mg-deficient plants.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/dbe008ffda26baa54d1ec43fcee38d69cf6f380d

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In Plant Science

1. C. Hermans
2. S. Prasad
3. D. Chauhan
4. R. Ahmad
5. T. Aziz
6. N. Verbruggen
7. E. Waraich
8. J. Cheeseman

Citations in the corpus

• Antimony Accumulation, Growth Performance, Antioxidant Defense System and Photosynthesis of Zea mays in Response to Antimony Pollution in Soil (2011, methodology): “The homogenate was filtered through twofold muslin cloth and centrifuged at 20,000×g for 10 min at 2°C ( Tewari et al. 2006 ).”
• Alleviation of temperature stress by nutrient management in crop plants: a review (2012, background): “Mg increased the activities of antioxidative enzymes and the concentration of antioxidant molecules in bean (Cakmak and Marschner, 1992; Cakmak, 1994), Mentha pulegium (Candan and Tarhan, 2003), maize (Tewari et al., 2004), pepper (Anza et al., 2005), and mulberry (Tewari et al., 2006).”
• Role of Macronutrients in Plant Growth and Acclimation: Recent Advances and Future Prospective (2014, background): “Tewari et al. (2006) further suggested that Mg deficiency increases the oxidative stress in mulberry plants by enhancing the generation of ROS and triggering distinct redox changes in the cellular metabolism, and with its sufficiency, activation of antioxidant machinery, including induction of…”
• Physiological and molecular responses to magnesium nutritional imbalance in plants (2013, background): “…dismutase, catalase, ascorbate peroxidase and glutathione reductase) have been reported in Mgdeficient leaves of several species (Cakmak and Marschner 1992; Candan and Tarhan 2003; Tewari et al. 2004, 2006; Anza et al. 2005; Cakmak and Marschner 2006; Hermans et al. 2010b; Yang et al. 2012).”
• Hydrogen Peroxide and Plant Stress: A Challenging Relationship (2007, background): “K (Shin and Schachtman 2004), Mg (Tewari et al. 2006), and Fe (Ranieri et al.”
• Magnesium deficiency in plants: An urgent problem (2016, background): “MGD also activates antioxidative defense enzymes in some plant species [34,37,45].”