Abstract
To evaluate the role of exogenous application of a phytochelating agent glutathione in increasing resistance against different heavy metals stress, nodal explants excised from 28-day-old in vitro seedlings of Spilanthes calva L. were cultured on Murashige and Skoog’s medium supplemented with 10 μM benzyl adenine and five different concentrations (1, 5, 50, 100, or 200 mg/l) of four heavy metals: As2O3, CuSO4, ZnSO4, or Pb(NO3)2. Data were recorded for percent survival, shoot number, and shoot length after 28 d of heavy metal treatment. All four heavy metals severely inhibited growth and morphogenesis. Pb proved most inhibitory whereas Zn was least effective. Pb was further selected to study the reversal effect of glutathione on morphogenesis. The addition of different concentrations (1, 5, 10, or 25 mg/l) of glutathione to media containing the Pb resulted in a significant improvement in almost all growth parameters. Inclusion of glutathione at 10 mg/l was optimum for maximum reversal of the negative effects of heavy metals on morphogenesis.
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The authors are grateful to the University Grant Commission, New Delhi, India and Delhi University, India for their financial assistance. VS is indebted to Council of Scientific and Industrial Research, New Delhi, India for JRF-SRF.
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Shankar, V., Thekkeettil, V., Sharma, G. et al. Alleviation of heavy metal stress in Spilanthes calva L. (antimalarial herb) by exogenous application of glutathione. In Vitro Cell.Dev.Biol.-Plant 48, 113–119 (2012). https://doi.org/10.1007/s11627-011-9409-9
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DOI: https://doi.org/10.1007/s11627-011-9409-9