Temporal variations in physiological responses of Kandelia obovata seedlings exposed to multiple heavy metals

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

13 Scopus Citations
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Author(s)

  • Shanshan Cheng
  • Nora Fung Yee Tam
  • Ruili Li
  • Xiaoxue Shen
  • Zhiyuan Niu
  • And 2 others
  • Minwei Chai
  • Guo Yu Qiu

Detail(s)

Original languageEnglish
Pages (from-to)1089-1095
Journal / PublicationMarine Pollution Bulletin
Volume124
Issue number2
Online published22 Apr 2017
Publication statusPublished - 30 Nov 2017

Abstract

A study was conducted to quantify temporal variations in physiological responses of Kandelia obovata under multiple heavy metal stress. The results showed that plant growth was not significantly affected by multiple heavy metal stress during the 120-days experiment. At the start, levels of net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) showed effects of “low-promotion, high-inhibition”, but Pn and Gs reduced with increasing heavy metal stress at the end. Temporary lipid oxidation was shown by high levels of malondialdehyde (MDA) under high heavy metal stress at the start but was unaffected at the end of the experiment. MDA negatively correlated with biomass and photosynthetic parameters and acted as a sensitive indicator. Proline also shared similar trend and indicated its temporary role in osmotic adjustment. Negative correlations between osmotic adjustment matter and photosynthetic parameters further confirmed the significant role of osmotic adjustment under heavy metal stress.

Research Area(s)

  • K. obovata, MDA, Multiple heavy metals stress, Photosynthetic characteristics, Proline

Citation Format(s)

Temporal variations in physiological responses of Kandelia obovata seedlings exposed to multiple heavy metals. / Cheng, Shanshan; Tam, Nora Fung Yee; Li, Ruili et al.

In: Marine Pollution Bulletin, Vol. 124, No. 2, 30.11.2017, p. 1089-1095.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review