Biologia plantarum 2014, 58:595-599 | DOI: 10.1007/s10535-014-0413-x

Effects of lanthanum on the ascorbate and glutathione metabolism of Vigna radiata seedlings under salt stress

C. Shan1,*, X. Zhao1
1 Henan Institute of Science and Technology, Xinxiang, P.R. China

In order to elucidate the role of lanthanum (La) in response of Vigna radiata to a salt stress, we investigated the effects of La on the ascorbate and glutathione metabolism. The results show that in comparison with a control, the salt stress increased the activities of ascorbate peroxidase (APX), glutathione reductase (GR), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), γ-glutamylcysteine synthetase (γ-ECS), and L-galactono-1,4-lactone dehydrogenase (GalLDH), and the content of ascorbic acid (AsA) and glutathione (GSH). It also increased the malondialdehyde content (MDA) and electrolyte leakage. The salt stress significantly decreased the ratios of AsA/dehydroascorbate (DHA) and GSH/glutathione disulphide (GSSG) compared with the control. The pretreatment with La not only significantly increased the activities of the above enzymes, the content of AsA, GSH, and the ratios of AsA/DHA and GSH/GSSG, but also significantly reduced the MDA content and electrolyte leakage compared with the salt stress alone. Our results suggest that La could up-regulate the ascorbate and glutathione metabolisms and could have an important role for acquisition of salt stress tolerance in Vigna radiata.

Keywords: ascorbate peroxidase; glutathione reductase; galactono-1,4-lactone dehydrogenase; γ-glutamylcysteine synthetase; mung bean; NaCl
Subjects: lanthanum; ascorbate; glutatione; salinity; ascorbate peroxidase; glutathione reductase; monodehydroascorbate reductase; dehydroascorbate reductase; malondialdehyde; mung bean
Species: Vigna radiata

Received: May 2, 2013; Revised: November 9, 2013; Accepted: January 20, 2014; Published: September 1, 2014Show citation

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Shan, C., & Zhao, X. (2014). Effects of lanthanum on the ascorbate and glutathione metabolism of Vigna radiata seedlings under salt stress. Biologia plantarum, 58(3), 595-599. doi: 10.1007/s10535-014-0413-x.
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