Accumulation and tolerance characteristics of lead in Althaea rosea Cav. and Malva crispa L.
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Two ornamental plants of Althaea rosea Cav. and Malva crispa L. were exposed to various concentrations of lead (Pb) (0, 50, 100, 200 and 500 mg·kg−1) for 70 days to evaluate the accumulating potential and the tolerance characteristics. The results showed that both plant species grown normally under Pb stress, and A. rosea had a higher tolerance than M. crispa, while M. crispa had a higher ability in Pb accumulation than A. rosea. Besides, lower Pb concentration (50 mg·kg−1) stimulated the shoot biomass in both plant species. Pb accumulation in plants was consistent with the increase of Pb levels, and the main accumulation sites were the roots and the older leaves. In addition, the photosynthetic pigments content and chlorophyll fluorescence parameters were influenced by Pb stress. In such case, both of the plants could improve the activities of antioxidant enzymes of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX), and the contents of the total soluble sugar and soluble protein, which reached the highest value at Pb 100 mg·kg−1, as well as the accumulation of the total thiols (T-SH) and non-protein thiols (NP-SH) to adapt to Pb stress. Thus, it provides the theoretical basis and possibility for ornamental plants of A. rosea and M. crispa in phytoremediation of Pb contaminated areas.
KeywordsAlthaea rosea Malva crispa Lead Physiological characteristics Accumulation ability
This work was financially supported by The 111 Project B08011, The Basic Work of the Ministry of Science and Technology, China (No. 2011FY110300).
Compliance with ethical standards
Conflict of interest
The authors declare no conflict of interest.
- Apel K, Hirt H (2004) Reactive oxygen species: metabolism, oxidative stress, and signal transduction. Annu Rev Plant Biol 55:373–399. https://doi.org/10.1146/annurev.arplant.55.031903.141701 CrossRefPubMedGoogle Scholar
- Gill SS, Khan NA, Tuteja N (2012) Cadmium at high dose perturbs growth, photosynthesis and nitrogen metabolism while at low dose it up regulates sulfur assimilation and antioxidant machinery in garden cress (Lepidium sativum L.). Plant Sci 182:112–120. https://doi.org/10.1016/j.plantsci.2011.04.018 CrossRefPubMedGoogle Scholar
- Jana S, Choudhuri MA (1982) Senescence in submerged aquatic angiosperms: effects of heavy metals. New Phytol 90(3):477–484. https://doi.org/10.1111/j.1469-8137.1982.tb04480.x CrossRefGoogle Scholar
- Malar S, Vikram SS, Favas PJ, Perumal V (2014) Lead heavy metal toxicity induced changes on growth and antioxidative enzymes level in water hyacinths [Eichhornia crassipes (Mart.)]. Bot stud 55(1):54. https://doi.org/10.1186/s40529-014-0054-6
- Maodzeka A, Hussain N, Wei L, Zvobgo G, Mapodzeke JM, Adil MF, Shamsi IH (2017) Elucidating the physiological and biochemical responses of different tobacco (Nicotiana tabacum) genotypes to lead toxicity. Environ Toxicol Chem 36(1):175–181. https://doi.org/10.1002/etc.3522 CrossRefPubMedGoogle Scholar
- Nakano Y, Asada K (1981) Hydrogen peroxide is scavenged by ascorbate-specific peroxidase in spinach chloroplasts. Plant Cell Physiol 22(5):867–880. https://doi.org/10.1093/oxfordjournals.pcp.a076232 CrossRefGoogle Scholar
- Outridge PM, Noller BN (1991) Accumulation of toxic trace elements by freshwater vascular plants. In: Ware GW (ed) Reviews of environmental contamination and toxicology. Springer, New York, pp 1–63. https://doi.org/10.1007/978-1-4612-3196-7
- Santos RW, Schmidt ÉC, Vieira IC, Costa GB, Rover T, Simioni C, Bouzon ZL (2015) The effect of different concentrations of copper and lead on the morphology and physiology of Hypnea musciformis cultivated in vitro: a comparative analysis. Protoplasma 252(5):1203–1215. https://doi.org/10.1007/s00709-014-0751-8 CrossRefPubMedGoogle Scholar
- Stobart AK, Griffiths WT, Ameen-Bukhari I, Sherwood RP (1985) The effect of Cd2+ on the biosynthesis of chlorophyll in leaves of barley. Physiol Plant 63(3):293–298. https://doi.org/10.1111/j.1399-3054.1985.tb04268.x CrossRefGoogle Scholar
- Upadhyaya A, Sankhla D, Davis TD, Sankhla N, Smith BN (1985) Effect of paclobutrazol on the activities of some enzymes of activated oxygen metabolism and lipid peroxidation in senescing soybean leaves. J Plant Physiol 121(5):453–461. https://doi.org/10.1016/S0176-1617(85)80081-X CrossRefGoogle Scholar