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 Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 116874 |
Journal / Publication | Marine Pollution Bulletin |
Volume | 207 |
Online published | 29 Aug 2024 |
Publication status | Published - Oct 2024 |
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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.
In: Marine Pollution Bulletin, Vol. 207, 116874, 10.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review