Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 24-30 |
| Number of pages | 7 |
| Journal | Aquatic Botany |
| Volume | 110 |
| DOIs | |
| Publication status | Published - 2013 |
| Externally published | Yes |
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Allelopathic inhibition of microalgae by the freshwater stonewort, Chara australis, and a submerged angiosperm, Potamogeton crispus. / Pakdel, Fariba M.; Sim, Lien; Beardall, John; DAVIS, Jenny.
In: Aquatic Botany, Vol. 110, 2013, p. 24-30.Research output: Contribution to journal › Article
TY - JOUR
T1 - Allelopathic inhibition of microalgae by the freshwater stonewort, Chara australis, and a submerged angiosperm, Potamogeton crispus
AU - Pakdel, Fariba M.
AU - Sim, Lien
AU - Beardall, John
AU - DAVIS, Jenny
PY - 2013
Y1 - 2013
N2 - Eutrophication is a major management issue in shallow lakes worldwide. The role of allelopathy in aquatic systems has received increasing attention as a potential means of controlling algal blooms. Macrophytes with allelopathic potential may play an important role in the restoration of eutrophic lakes. Our objective was to investigate the allelopathic effect of the freshwater stonewort, Chara australis, and the submerged angiosperm, Potamogeton crispus, on microalgae. To detect possible allelopathic effects, we compared the growth of a cyanobacterial species, Anabaena variabilis and a green alga, Scenedesmus quadricauda, in the presence and absence of macrophyte extracts, exudates and live material. We found a significant negative effect of all treatments on A. variabilis, with the strongest effect produced by C. australis. In contrast, no effect of macrophyte extracts was evident on the growth of S. quadricauda. This absence of effect confirmed earlier findings that macrophyte allelochemicals are specific to particular target organisms. Our results suggest that allelopathic macrophytes have the potential to mitigate phytoplankton blooms in systems dominated by A. variabilis and perhaps other cyanobacteria.
AB - Eutrophication is a major management issue in shallow lakes worldwide. The role of allelopathy in aquatic systems has received increasing attention as a potential means of controlling algal blooms. Macrophytes with allelopathic potential may play an important role in the restoration of eutrophic lakes. Our objective was to investigate the allelopathic effect of the freshwater stonewort, Chara australis, and the submerged angiosperm, Potamogeton crispus, on microalgae. To detect possible allelopathic effects, we compared the growth of a cyanobacterial species, Anabaena variabilis and a green alga, Scenedesmus quadricauda, in the presence and absence of macrophyte extracts, exudates and live material. We found a significant negative effect of all treatments on A. variabilis, with the strongest effect produced by C. australis. In contrast, no effect of macrophyte extracts was evident on the growth of S. quadricauda. This absence of effect confirmed earlier findings that macrophyte allelochemicals are specific to particular target organisms. Our results suggest that allelopathic macrophytes have the potential to mitigate phytoplankton blooms in systems dominated by A. variabilis and perhaps other cyanobacteria.
KW - Allelopathy
KW - Macrophytes
KW - Algal blooms
KW - Cyanobacteria
KW - Eutrophication
KW - Growth inhibition.
U2 - 10.1016/j.aquabot.2013.04.005
DO - 10.1016/j.aquabot.2013.04.005
M3 - Article
VL - 110
SP - 24
EP - 30
JO - Aquatic Botany
JF - Aquatic Botany
SN - 0304-3770
ER -