Biologia Plantarum

, Volume 41, Issue 3, pp 469–473 | Cite as

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

  • A. Mishra
  • M.A. Choudhuri


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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