Mixed heavy metals tolerance and radial oxygen loss in mangrove seedlings
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363, more |  |
| Keywords | Anatomical structures > Body organs > Plant organs > Roots
Chemical elements > Metals > Heavy metals > Lead
Chemical elements > Metals > Heavy metals > Zinc
Chemical elements > Metals > Transition elements > Heavy metals > Copper
Mangroves
Pollution effects
Properties > Biological properties > Tolerance > Pollution tolerance
Seedlings
Spatial distribution
Aegiceras corniculatum (L.) Blanco [WoRMS]; Avicennia marina (Forssk.) Vierh. [WoRMS]; Bruguiera gymnorrhiza (L.) Lam. [WoRMS]
Marine/Coastal | | Author keywords | Aegiceras corniculatum; Avicennia marina; Bruguiera gymnorrhiza; Copper;Lead; Zinc |
| Authors | | Top | - Liu, Y., more
- Tam, N.F.-Y.
- Yang, J.X.
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| 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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