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Physiological responses and detoxific mechanisms to Pb, Zn, Cu and Cd in young seedlings of Paulownia fortunei

Wang, Jiang ; Li, Weihua ; Zhang, Chongbang ; Ke, Shisheng

Journal of Environmental Sciences, 2010, Vol.22(12), pp.1916-1922 [Tạp chí có phản biện]

ISSN: 1001-0742 ; E-ISSN: 1878-7320 ; DOI: 10.1016/S1001-0742(09)60339-9

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  • Nhan đề:
    Physiological responses and detoxific mechanisms to Pb, Zn, Cu and Cd in young seedlings of Paulownia fortunei
  • Tác giả: Wang, Jiang ; Li, Weihua ; Zhang, Chongbang ; Ke, Shisheng
  • Chủ đề: Heavy Metals ; Defense System ; Oxygen Species ; Antioxidant Enzyme ; Phytochelatins ; Engineering ; Environmental Sciences
  • Là 1 phần của: Journal of Environmental Sciences, 2010, Vol.22(12), pp.1916-1922
  • Mô tả: has been successfully used in the phytoremediation of many Pb/Zn mine tailings. However, seed germination and young seedlings of rarely occurred in these mine tailings. The physiological responses and detoxific mechanisms of young seedling to Pb, Zn, Cu and Cd stress were investigated. The germinated rate, shoot length, chlorophyll and carotenoid contents in leaves of young seedlings had a great reduction under Zn and Cu treatments, but had little decrease under Pb and Cd treatments. The production rate of O , H O and malondialdehyde (MDA) contents significantly increased in response to added Zn and Cu indicating great oxidative stress for young seedlings, but they had no significant change to added Pb and Cd. Young seedlings had effective detoxific mechanism to Pb and Cd, as antioxidant enzymes activities, phytochelatins (PCs-SH) and proline contents increased with increasing rates of added Pb and Cd. However, young seedlings had un-effective detoxific mechanisms to Zn and Cu stress. Results revealed the heavy metals (such as Cu) that present at low concentrations in mine tailings may be major constraint for the survival of young seedlings.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 1001-0742 ; E-ISSN: 1878-7320 ; DOI: 10.1016/S1001-0742(09)60339-9

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