Inhibitory Effects and Mechanisms of Hydrilla verticillata (Linn.f.) Royle Extracts on Freshwater Algae

Abstract

To pursue an effective way to control freshwater algae, four extracts from a submerged macrophyte Hydrilla verticillata (Linn.f.) Royle were tested to study its inhibitory effects on Anabaena flos-aquae FACHB-245 and Chlorella pyrenoidosa Chick FACHB-9. Extract with the highest inhibiting ability was further studied in order to reveal the inhibitory mechanism. The results demonstrated that H. verticillata extracts inhibited the growth of A. flos-aquae and C. pyrenoidosa, and methanol extract had the highest inhibiting ability. The mechanism underlying the algal growth inhibition involves the superoxide anion radical generation that induces the damage of cell wall and release of intracellular components.

Assessment of the Effects of Four Plant Species Used in Mexican Traditional Medicine Against Microcystis aeruginosa

“…A consequence of lipid peroxidation is the leakage of intracellular material, such as proteins, DNA and RNA, among others (Zhang et al, 2012). In the present investigation, we observed a substantial increase in the protein and nucleotide concentration of M. aeruginosa due to exposure to L. tridentata extract, inducing gradual increases in OD 280 and OD 260 values.…”

“…The OD ratio between the experimental group and the control group was used to evaluate the level of protein and nucleotide release (Zhang et al, 2012).…”

Application of Selected Malaysian Wild Plant Leaves as Potential Control of Cyanobacterial Bloom

“…This thus leads to one of the earliest researches on anti-cyanobacterial compounds using a more natural resource; deciduous plant leaves [10]. Subsequently, more researchers observed the inhibition of cyanobacterial growth by different terrestrial plants and herbs, such as Gingko biloba [11],oak trees [12], Chinese herbs [13], andaquatic plants such as Myriophyllum spicatum [14],Pista stratiotes [15] and Hydrilla verticillata [16].Several active compounds released from plants have been successfully isolated and characterized in previous researches, which include polyphenol [17],terpenoid [8] and fatty acid [14]. These compounds inhibit growth via different pathways, such as inhibition of photosynthesis, disruption of cellular structure, and inactivation of enzymatic and non-enzymatic functions [17].…”

Allelopathic Activities of Three Emergent Macrophytes on Several Monospecific Cyanobacterial Species and Natural Phytoplankton Assemblages

“…Environmental and health problems from these water blooms, such as deterioration of water quality, potentially decrease biodiversity [2] and affecting human health through food chains [3], have been documented in many regions due to the production of cyanotoxins [4]. Therefore, control and elimination of cyanobacterial blooms is crucial in the management and mitigation of aquatic ecosystems.A variety of methods have been proposed for removing and/or inhibiting cyanobacterial blooms, such as allelopathy (allelochemicals) from plants [5][6][7] Pol. J. Environ.…”

“…A variety of methods have been proposed for removing and/or inhibiting cyanobacterial blooms, such as allelopathy (allelochemicals) from plants [5][6][7] Pol. J. Environ.…”