Differential allelopathic effects of mangrove plants Kandelia obovata and Aegiceras corniculatum on harmful algal species : Potential applications in algal bloom control

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Brian Yu-Keung Wong
  • Yang-Hang Chen
  • Kai-Hui Cui
  • Hai-Chao Zhou
  • Feng-Lan Li
  • And 3 others
  • Nora Fung-Yee Tam
  • Fred Wang-Fat Lee
  • Steven Jing-Liang Xu

Detail(s)

Original languageEnglish
Article number116874
Journal / PublicationMarine Pollution Bulletin
Volume207
Online published29 Aug 2024
Publication statusPublished - Oct 2024

Abstract

This study examined effects of mangrove plants Kandelia obovata and Aegiceras corniculatum on harmful algal species. While A. corniculatum leaf extract had no inhibitory effect, K. obovata leaf extract significantly inhibited the growth of two harmful algal species Alexandrium tamarense and Karenia mikimotoi. The inhibitory effect was concentration-dependent, with over 90 % inhibition at the highest concentration. Morphological changes and cell size reduction were observed in both microalgae. Excessive production of reactive oxygen species and damage to algal photosynthetic system were found. The allelopathic effect of K. obovata on K. mikimotoi with low-concentration repeated exposure was more effective than high-concentration single exposure. The EC50 of K. obovata (0.33 g L−1) was lower than reported values on other coastal plants. Higher inhibitory effects of K. obovata were found on naked algal species than the armoured ones. These findings suggest potential applications of K. obovata leaf extract in controlling harmful algal blooms. © 2024 Elsevier Ltd.

Research Area(s)

  • Allelopathy, Harmful algal blooms, High-concentration single exposure, Low-concentration repeated exposure, Mangrove

Citation Format(s)

Differential allelopathic effects of mangrove plants Kandelia obovata and Aegiceras corniculatum on harmful algal species: Potential applications in algal bloom control. / Wong, Brian Yu-Keung; Chen, Yang-Hang; Cui, Kai-Hui et al.
In: Marine Pollution Bulletin, Vol. 207, 116874, 10.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review