Potential role of L-glutamic acid in mitigating cadmium toxicity in lentil (Lens culinaris Medik.) through modulating the antioxidant defence system and nutrient homeostasis

Authors

  • Jannatul FARDUS Kagawa University, Faculty of Agriculture, Laboratory of Plant Stress Responses, Ikenobe 2393, Miki-cho, Kita gun, Kagawa, 761-0795 (JP)
  • Md. Shahadat HOSSAIN Kagawa University, Faculty of Agriculture, Laboratory of Plant Stress Responses, Ikenobe 2393, Miki-cho, Kita gun, Kagawa, 761-0795 (JP)
  • Masayuki FUJITA Kagawa University, Faculty of Agriculture, Laboratory of Plant Stress Responses, Ikenobe 2393, Miki-cho, Kita gun, Kagawa, 761-0795 (JP)

DOI:

https://doi.org/10.15835/nbha49412485

Keywords:

amino acid, cadmium stress, cadmium uptake, enzyme activities, oxidative damage, ROS

Abstract

DOI: 10.15835/nbha49412485 

Using phosphate fertilizers and wastewater as a source of irrigation and residuals from industries have considerably increased the level of cadmium (Cd) in soil which severely reduced the growth and yield of crop. L-glutamic acid (L-Glu), an amino acid, plays key roles in plant stress tolerance. Hence, the current study was conducted to determine the potential role of L-Glu pre-treatment in alleviating Cd-induced toxicity in lentil (Lens culinaris Medik.). Lentil seedlings were exposed to two doses of Cd (1 and 2 mM CdCl2) with or without 10 mM L-Glu pre-treatment. The results suggested that a high dose of Cd negatively affected the shoot dry weight, root dry weight, and photosynthetic pigments (chlorophylls and carotenoids). Furthermore, Cd stress induced severe oxidative damage, a reduction in catalase (CAT) activity and ascorbate (AsA) content, and accumulation of Cd in both the roots and shoots. Adding L-Glu protected the photosynthetic pigments of the lentil seedlings and thus improved the growth of the seedlings. In addition, L-Glu pre-treatment enhanced the ascorbate (AsA) content; increased the activity of enzymes such as catalase, ascorbate peroxidase, monodehydroascorbate reductase, and glutathione peroxidase. L-Glu was also reduced Cd uptake and translocation, which in turn alleviated the oxidative damage in the Cd-stressed seedlings indicated the potential role of this chemical. Results suggest that pre-treatment with L-Glu reduces Cd toxicity in lentil seedlings by inhibiting Cd accumulation and by reducing oxidative damage.

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2021-11-02

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FARDUS, J., HOSSAIN, M. S., & FUJITA, M. (2021). Potential role of L-glutamic acid in mitigating cadmium toxicity in lentil (Lens culinaris Medik.) through modulating the antioxidant defence system and nutrient homeostasis. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 49(4), 12485. https://doi.org/10.15835/nbha49412485

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DOI: 10.15835/nbha49412485