Biologia Plantarum

, Volume 41, Issue 3, pp 469–473

Amelioration of lead and mercury effects on germination and rice seedling growth by antioxidants

  • A. Mishra
  • M.A. Choudhuri
Article

Abstract

Germination of two rice (Oryza sativa L.) cultivars (Ratna and IR 36) in the presence of 10 µM PbCl2 and 10 µM HgCl2 decreased germination percentage, germination index, shoot/root length, tolerance index and dry mass of shoots and roots. Mercury was more toxic than lead. Reduced glutathione (GSH), cysteine (Cys), ascorbic acid, and α-tocopherol alleviated the adverse effects of these metals on plants in the order GSH > Cys > ascorbic acid > α-tocopherol. The effects were more pronounced in tolerant cultivar IR 36 than in the relatively susceptible cultivar Ratna.

ascorbic acid cysteine germination index Oryza sativa reduced-glutathione α-tocopherol tolerance index 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • A. Mishra
    • 1
  • M.A. Choudhuri
    • 1
  1. 1.Plant Physiology and Biochemistry Laboratory, Department of BotanyUniversity of Burdwan, BurdwanBengalIndia

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