biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 41:469-473, 1998 | DOI: 10.1023/A:1001871015773

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

A. Mishra1, M.A. Choudhuri1
1 Plant Physiology and Biochemistry Laboratory, Department of Botany, University of Burdwan, Burdwan, Bengal, India

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.

Keywords: ascorbic acid; cysteine; germination index; Oryza sativa; reduced-glutathione; α-tocopherol; tolerance index
Subjects: antioxidants, mercury and lead stress; ascorbic acid, mercury and lead stress; cysteine, mercury and lead stress; germination index, mercury and lead stress; glutathione, mercury and lead stress; lead stress, amelioration by antioxidants; mercury stress, amelioration by antioxidants; Oryza sativa; rice, mercury lead stress; a-tocopherol, mercury lead stress; tolerance index, mercury lead stress

Published: April 1, 1998  Show citation

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Mishra, A., & Choudhuri, M.A. (1998). Amelioration of lead and mercury effects on germination and rice seedling growth by antioxidants. Biologia plantarum, 41(3), 469-473. doi: 10.1023/A:1001871015773
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