Loading…
Non-toxic antifouling potential of Caatinga plant extracts: effective inhibition of marine initial biofouling
The Caatinga biome, an endemic biome in Brazil with extreme environmental conditions, favors the production of bioactive natural compounds—with a potential antifouling effect—by terrestrial plants. We report antifouling screening of Caatinga plant extracts against marine bacterial biofilm and their...
Saved in:
Published in: | Hydrobiologia 2020, Vol.847 (1), p.45-60 |
---|---|
Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | The Caatinga biome, an endemic biome in Brazil with extreme environmental conditions, favors the production of bioactive natural compounds—with a potential antifouling effect—by terrestrial plants. We report antifouling screening of Caatinga plant extracts against marine bacterial biofilm and their toxicity towards non-target organisms. Twelve aqueous plant extracts, collected in the Vale do Catimbau region of PE, Brazil, were employed in different concentrations (0–0.5–1–2–4–8 mg mL
−1
) in this study. The biofilm and planktonic bacteria inhibition potential were evaluated through flow cytometry and by crystal violet assay. The treatments that showed inhibition of biofilm bacterial density (≥ 80%) and biomass were evaluated for their toxicity. Growth inhibition of the planktonic microalgae,
Chaetoceros calcitrans
; mortality of the benthic copepod,
Nitokra
sp.; and mortality and swimming alteration of the planktonic brine shrimp,
Artemia salina
were used as endpoints. The extracts of
Harpochilus neesianus
mix and
Turnera hermannioides
leaves presented ≥ 86% and ≥ 44% inhibition of initial biofouling density and biomass, respectively, without inhibiting marine planktonic bacterial growth, while extracts of
Myracrodruon urundeuva
leaves showed high antibiotic activity. These extracts were active against marine bacterial biofilms density and biomass and were safe to non-target organisms at lower concentrations. Our study demonstrates the biotechnological potential of plant extracts from Caatinga as an antifouling alternative. |
---|---|
ISSN: | 0018-8158 1573-5117 |
DOI: | 10.1007/s10750-019-04071-6 |