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International Scholarly Research Notices has retracted this article. The article was found to contain images with signs of duplication and manipulation in Figures 5(a), 5(b), 6(a), and 6(b), and duplication from Talukdar D. Plant Growth and Leaf Antioxidant Metabolism of Four Elite Grass Pea (Lathyrus sativus) Genotypes, Differing in Arsenic Tolerance. Agric Res (2013) 2: 330. doi:10.1007/s40003-013-0085-3 in Figure 6.

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References

  1. D. Talukdar, “Growth responses and leaf antioxidant metabolism of grass pea (Lathyrus sativus L.) genotypes under salinity stress,” ISRN Agronomy, vol. 2013, Article ID 284830, 15 pages, 2013.
ISRN Agronomy
Volume 2013, Article ID 284830, 15 pages
http://dx.doi.org/10.1155/2013/284830
Research Article

Growth Responses and Leaf Antioxidant Metabolism of Grass Pea (Lathyrus sativus L.) Genotypes under Salinity Stress

Department of Botany, R.P.M. College, University of Calcutta, Uttarpara, Hooghly, West Bengal 712 258, India

Received 3 September 2013; Accepted 17 November 2013

Academic Editors: A. Berville and F. Volaire

Copyright © 2013 Dibyendu Talukdar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Response of six improved grass pea genotypes to prolonged salinity stress was investigated on seedlings grown in pot experiment using 150 mM NaCl up to 60 days of growth after commencement of treatment (DAC). NaCl exposure significantly reduced growth potential of varieties PUSA-90-2 and WBK-CB-14, but no such effect was observed in varieties B1, BioL-212 and in two mutant lines LR3 and LR4. A time-bound measurement at 15, 30 and 60 DAC revealed significant reduction in plant dry matter production, orchestrated through abnormally low capacity of leaf photosynthesis accompanied by low K+/Na+ ratio and onset of oxidative stress in all six genotypes at 15 DAC and the extension of the phenomena in PUSA-90-2 and WBK-CB-14 to 60 DAC. High superoxide dismutase (SOD) activity coupled with low ascorbate redox and declining ascorbate peroxidase (APX) and catalases (CAT) levels led to abnormal rise in H2O2 content at reproductive stage (30 DAC) in the latter two genotypes, consequently, resulting in NaCl-induced oxidative damage. H2O2 level in the rest of the four genotypes was modulated in a controlled way by balanced action of SOD, APX and CAT, preventing oxidative damage even under prolonged NaCl-exposure. Enzyme isoforms were involved in regulation of foliar H2O2-metabolism, which was critical in determining As tolerance of grass pea genotypes.