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Mixed heavy metals tolerance and radial oxygen loss in mangrove seedlings
Liu, Y.; Tam, N.F.-Y.; Yang, J.X.; Pi, N.; Wong, M.H.; Ye, Z.H. (2009). Mixed heavy metals tolerance and radial oxygen loss in mangrove seedlings. Mar. Pollut. Bull. 58(12): 1843-1849
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X, more
Peer reviewed article  

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Keywords
    Copper; Lead; Mangroves; Pollution effects; Pollution tolerance; Roots; Seedlings; Spatial distribution; Zinc; Aegiceras corniculatum (L.) Blanco [WoRMS]; Avicennia marina (Forssk.) Vierh. [WoRMS]; Bruguiera gymnorrhiza (L.) Lamk. [WoRMS]; Marine

Authors  Top 
  • Liu, Y., more
  • Tam, N.F.-Y.
  • Yang, J.X.
  • Pi, N.
  • Wong, M.H.
  • Ye, Z.H.

Abstract
    The effects of a mixture of heavy metals (Pb, Zn and Cu) on growth, radial oxygen loss (ROL) and the spatial pattern of ROL were investigated in mangrove seedlings of three species: Aegiceras corniculatum, Avicennia marina and Bruguiera gymnorrhiza. Heavy metals inhibited the growth of seedlings and led to decreased ROL and changes in the “tight” barrier spatial pattern of ROL. There was a significant positive correlation between the amount of ROL from the roots of seedlings and metal tolerance. The species with the highest ROL amount, B. gymnorrhiza, were also the most tolerant to heavy metals. The “tight” barrier spatial ROL pattern was also related to metal tolerance in the seedlings. Therefore, we conclude that both ROL amount and “tight” barrier spatial ROL pattern in the roots of the mangrove seedlings play an important role in resistance to heavy metal toxicity.

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