TY - JOUR
T1 - Temporal changes of polyphenols and enzyme activities in seedlings of Kandelia obovata under lead and manganese stresses
AU - Yan, Zhong Zheng
AU - Tam, Nora Fung Yee
N1 - Funding Information:
The work described in this paper was supported by a grant from the Research Grant Council of the Hong Kong SAR, China (Project No. 160907).
PY - 2011
Y1 - 2011
N2 - The temporal responses of peroxidase (POD), superoxide dismutase (SOD), total polyphenols (TP), extractable condensed tannins (ECT) to different levels of lead (Pb) or manganese (Mn) stress, as well as the metal accumulation, in seedlings of Kandelia obovata were investigated. Both stress time and stress intensity had significant effects with significant accumulation of Pb and Mn in roots at Day 1. Pb and Mn showed no significant effects on root or leaf TP and ECT at Day 1. Prolonged exposure to metals caused significant drops of root TP and ECT but increased in leaves at Days 7 and 49. POD activities decreased in both roots and leaves at Day 1, while POD and SOD both increased under moderate levels of Pb and Mn at Day 7. The present study showed that antioxidative enzyme activities were more sensitive indicators to Pb or Mn stresses than phenolic compounds.
AB - The temporal responses of peroxidase (POD), superoxide dismutase (SOD), total polyphenols (TP), extractable condensed tannins (ECT) to different levels of lead (Pb) or manganese (Mn) stress, as well as the metal accumulation, in seedlings of Kandelia obovata were investigated. Both stress time and stress intensity had significant effects with significant accumulation of Pb and Mn in roots at Day 1. Pb and Mn showed no significant effects on root or leaf TP and ECT at Day 1. Prolonged exposure to metals caused significant drops of root TP and ECT but increased in leaves at Days 7 and 49. POD activities decreased in both roots and leaves at Day 1, while POD and SOD both increased under moderate levels of Pb and Mn at Day 7. The present study showed that antioxidative enzyme activities were more sensitive indicators to Pb or Mn stresses than phenolic compounds.
KW - Heavy metals
KW - Kandelia obovata
KW - Peroxidase
KW - Superoxide dismutase
KW - Tannin
UR - http://www.scopus.com/inward/record.url?scp=79960379902&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2011.04.027
DO - 10.1016/j.marpolbul.2011.04.027
M3 - Article
C2 - 21612799
AN - SCOPUS:79960379902
SN - 0025-326X
VL - 63
SP - 438
EP - 444
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 5-12
ER -