Can the presence of green microalgae reverse the allelopathic effects of the submerged macrophyte Egeria densa on the toxin-producing cyanobacterium Raphidiopsis raciborskii?

Barbosa, Vanessa Virginia; Silva, Ranielle Daiana dos Santos; Severiano, Juliana dos Santos; Chia, Mathias Ahii; Barbosa, José Etham de Lucena

doi:10.1007/s10750-022-04997-4

Cited by 5 publications

(2 citation statements)

References 56 publications

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“…If the active concentration of 10 g•l −1 may appear quite high, this is consistent with literature that frequently reports the effects of extracts from several grams per liter. For instance, Chara globularis inhibits cyanobacteria growth at 2.5 g•l −1 [46] and Egeria densa at 3 g•l −1 [47].…”

Section: Molecular and Physiological Responses Of M Aeruginosa To L M...mentioning

confidence: 99%

Effects of Lagarosiphon major extracts on the metabolome and photosynthesis of Microcystis aeruginosa

Tison-Rosebery,

Moreira,

Eon

et al. 2023

Comptes Rendus. Chimie

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Over the last decades, Aquitaine lakes have been exposed to growing biomasses of invasive macrophytes, in particular Lagarosiphon major, and to frequent blooms of the cyanobacteria Microcystis aeruginosa. Our aim was to explore the potential role of L. major in the regulation of such blooms, through allelopathic interactions. Experiments consisted of exponential growth phase cells incubated for 96 h in L. major extracts at increasing concentrations. Our approach was based on untargeted metabolomics and photosynthetic activity measurements.We demonstrated the anticyanobacterial properties of L. major extracts. In particular, we reported that L. major extracts inhibited M. aeruginosa photosynthesis, and affected the production of various metabolite classes and pathways mainly involved in the secondary metabolism of the cyanobacteria.We further provided clear evidence about the existence of metabolite classes in L. major that may be involved in allelopathic interactions with M. aeruginosa, such as caffeic acid.

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Section: Molecular and Physiological Responses Of M Aeruginosa To L M...mentioning

confidence: 99%

Effects of Lagarosiphon major extracts on the metabolome and photosynthesis of Microcystis aeruginosa

Tison-Rosebery,

Moreira,

Eon

et al. 2023

Comptes Rendus. Chimie

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“…In this study, we selected E. densa plant, which is an invasive perennial macrophyte known to produce allelochemicals that inhibit cyanobacteria, as indicated in previous studies [11,23,24,32]. Although research has confirmed the applicability of live plants and plant extracts to suppress cyanobacteria, the enhanced allelochemical content in extracts of macrophytes that co-cultured with cyanobacteria has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Inhibitory Effect of Aqueous Extracts from Egeria densa Planch. on Cyanobacteria Microcystis aeruginosa (Kützing) Lemmermann Growth

Wijesinghe,

Senavirathna,

Fujino

2023

Hydrobiology

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This study aimed to investigate the allelopathic effect of live Egeria densa Planch. and its aqueous extracts in inhibiting the cyanobacterium Microcystis aeruginosa (Kützing) Lemmermann through a possible growth inhibition pathway. Under coexistence, the presence of live E. densa reduced the growth of M. aeruginosa by 48% compared to when M. aeruginosa was alone. Consequently, we prepared two separate aqueous extracts with distilled water: one from E. densa plants collected from monocultures, and the other from E. densa plants collected from co-cultivation with M. aeruginosa. At a concentration of 0.5 g/L, both extracts successfully suppressed the growth of M. aeruginosa throughout the 5-day exposure period. The extracts obtained from E. densa plants grown in a combined culture with M. aeruginosa showed significant growth-inhibiting capabilities compared to the extracts obtained from E. densa monoculture (p < 0.05). They showed 22% more growth inhibition compared to cultures exposed to monoculture extracts at day 5, indicating that the production of allelochemicals in E. densa was induced during co-existence with cyanobacteria. However, the higher concentrations (2 and 4 g/L) of both extracts did not effectively exhibit a successful inhibitive ability, possibly due to the presence of high nutrient concentrations, specifically PO43−, which may be potentially suppressing the activity of allelochemicals. Further studies are recommended in identifying the specific allelochemicals and exploring their practical implementation in the field.

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Climate features or the composition of submerged vegetation? Which factor has a greater impact on the phytoplankton structure in temperate lakes?

Pełechata

Kufel

Pukacz

et al. 2023

Ecological Indicators

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Can the presence of green microalgae reverse the allelopathic effects of the submerged macrophyte Egeria densa on the toxin-producing cyanobacterium Raphidiopsis raciborskii?

Cited by 5 publications

References 56 publications

Effects of Lagarosiphon major extracts on the metabolome and photosynthesis of Microcystis aeruginosa

Effects of Lagarosiphon major extracts on the metabolome and photosynthesis of Microcystis aeruginosa

Inhibitory Effect of Aqueous Extracts from Egeria densa Planch. on Cyanobacteria Microcystis aeruginosa (Kützing) Lemmermann Growth

Climate features or the composition of submerged vegetation? Which factor has a greater impact on the phytoplankton structure in temperate lakes?

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