TY - JOUR
T1 - Mixed heavy metals tolerance and radial oxygen loss in mangrove seedlings
AU - Liu, Y.
AU - Tam, N. F.Y.
AU - Yang, J. X.
AU - Pi, N.
AU - Wong, M. H.
AU - Ye, Z. H.
N1 - Funding Information:
We sincerely thank Prof. William Armstrong (Hull University, UK) for providing the O 2 -Sleeving Electrode. We also thank Mr. King Wai CHAN (Hong Kong Baptist University), Ms. King Chuen CHUNG (HKBU) and Ms. Yan WU (City University of Hong Kong) for their technical assistance. The study work was financially supported by the Research Grants Council of the Hong Kong SAR, China (Project No. CityU 1406/06M), the National 863 project of China (No. 2007AA091703), and National Natural Science Foundation of China (Nos. 30570345 and 30770417).
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - Aegiceras corniculatum
KW - Avicennia marina
KW - Bruguiera gymnorrhiza
KW - Copper
KW - Lead
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=71849120374&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2009.07.023
DO - 10.1016/j.marpolbul.2009.07.023
M3 - Article
C2 - 19692098
AN - SCOPUS:71849120374
SN - 0025-326X
VL - 58
SP - 1843
EP - 1849
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 12
ER -