Abstract
The growth of the Cd-hyperaccumulator Solanum nigrum L. and its physiological responses to a short-term (7 d) Cd stress and to exogenous methyl jasmonate (MeJA) were investigated. Compared with the leaves of S. nigrum, the roots were more liable to Cd and showed a significantly decreased dry mass and increased malondialdehyde content. Cd accumulation in the shoots and roots of S. nigrum were proportional to the Cd concentration in the hydroponic solution. The application of a low concentration of MeJA (0.01 μM) significantly reduced the translocation/accumulation of Cd in both the shoots and roots compared with a 40 mg dm−3 Cd treatment only. Moreover, 40 mg dm−3 Cd significantly decreased the activity of leaf superoxide dismutase, but 0.01 μM MeJA restored it. MeJA also enhanced the activity of catalase in the leaves but showed no significant effect on peroxidase activity. The content of both endogenous jasmonic acid (JA) and MeJA in the leaves of S. nigrum increased with the increase of exogenous MeJA concentration.
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Abbreviations
- CAT:
-
catalase
- GSH:
-
glutathione
- H2O2 :
-
hydrogen peroxide
- JA:
-
jasmonic acid
- MDA:
-
malondialdehyde
- MeJA:
-
methyl jasmonate
- O2 ·− :
-
superoxide radical
- ·OH:
-
hydroxyl radical
- POD:
-
peroxidase
- ROS:
-
reactive oxygen species
- SOD:
-
superoxide dismutase
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Acknowledgements: The work described in this paper was supported by the SKLEC-2012RCDW02, the National Nature Science Foundation of China (No. 41201525).
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Yan, Z., Zhang, W., Chen, J. et al. Methyl jasmonate alleviates cadmium toxicity in Solanum nigrum by regulating metal uptake and antioxidative capacity. Biol Plant 59, 373–381 (2015). https://doi.org/10.1007/s10535-015-0491-4
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DOI: https://doi.org/10.1007/s10535-015-0491-4