Marine Organisms for the Sustainable Management of Plant Parasitic Nematodes

Veronico, Pasqua; Melillo, M. T.

doi:10.3390/plants10020369

Cited by 12 publications

(6 citation statements)

References 66 publications

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“…Regarding nematicidal activity, the brown seaweed Padina concrescens showed the highest egg hatching inhibition of M. incognita (59%), followed by red seaweed Laurencia johnstonii (48%) and Sargassum horridum (43%). Previous experiments have shown that aqueous and methanolic extracts of brown and red seaweeds are more effective than those of green macroalgae on nematode egg hatching inhibition and nematicidal activity(Khan et al, 2015;Veronico & Melillo, 2021). Even though the seaweeds studied, in the investigation mentioned before, were collected in very different location compared to the seaweeds collected for this experiment, our results indicate the same tendency.…”

supporting

confidence: 71%

Evaluation of Baja Peninsula seaweeds against plant pathogens

González-Castro,

Rojas-Contreras,

Romero-Bastidas

et al. 2024

Preprint

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The widespread use of synthetic pesticides to control pests has generated serious consequences on the environment and human health. Currently, efforts focused on the search for new pesticides with less impact on the environment have been doubled. Marine algae synthesize compounds with activity against various agricultural pests (insects, nematodes, and fungi); however, marine pesticides are an underdeveloped alternative. This represents an opportunity to explore new sources of compounds. The objective of this work is to evaluate the antimicrobial, nematicidal and insecticidal activity of seaweed extracts against pathogens of agricultural importance. Therefore, seaweeds were collected from different locations at the Baja California peninsula, Mexico, and ethanolic extracts were obtained. The antibacterial and antifungal activity against five phytopathogenic strains and Fusarium oxysporum was evaluated by disc diffusion on agar. Nematicidal activity was assessed by egg hatching inhibition on Meloidogyne incognita and insecticidal activity against maize weevil Sitophilus zeamais. Regarding the antibacterial potential, Laurencia johnstonii, Asparagopsis taxiformis and Dictyota dichotoma showed higher inhibition against all the strains. Padina concrescens exhibited the highest percentage of egg hatching inhibition against M. incognita (59%) followed by L. johnstonii (48%). All the seaweeds cause mortality of S. zeamais. However, the highest insecticidal activity was found on L. johnstonii (71.9%). Red and brown seaweeds showed in general higher content of total phenolic compounds. Red and brown seaweed showed great potential for the control of phytopathogens through appropriate agricultural practices. However, further research is necessary to identify the active compounds.

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supporting

confidence: 71%

Evaluation of Baja Peninsula seaweeds against plant pathogens

González-Castro,

Rojas-Contreras,

Romero-Bastidas

et al. 2024

Preprint

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“…The extracts and compounds from micro-and macroalgae are also effective against plant-parasitic nematodes that are responsible for the annual loss of 10-25% of worldwide crop production [92] (Table 4). Brominated diterpenes that were isolated from the marine red alga Jania rubens were effective against Allolobophora caliginosa [93].…”

Section: Nematocidal Actionmentioning

confidence: 99%

Algae and Their Metabolites as Potential Bio-Pesticides

Asimakis

Shehata²,

Eisenreich

et al. 2022

Microorganisms

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An increasing human population necessitates more food production, yet current techniques in agriculture, such as chemical pesticide use, have negative impacts on the ecosystems and strong public opposition. Alternatives to synthetic pesticides should be safe for humans, the environment, and be sustainable. Extremely diverse ecological niches and millions of years of competition have shaped the genomes of algae to produce a myriad of substances that may serve humans in various biotechnological areas. Among the thousands of described algal species, only a small number have been investigated for valuable metabolites, yet these revealed the potential of algal metabolites as bio-pesticides. This review focuses on macroalgae and microalgae (including cyanobacteria) and their extracts or purified compounds, that have proven to be effective antibacterial, antiviral, antifungal, nematocides, insecticides, herbicides, and plant growth stimulants. Moreover, the mechanisms of action of the majority of these metabolites against plant pests are thoroughly discussed. The available information demonstrated herbicidal activities via inhibition of photosynthesis, antimicrobial activities via induction of plant defense responses, inhibition of quorum sensing and blocking virus entry, and insecticidal activities via neurotoxicity. The discovery of antimetabolites also seems to hold great potential as one recent example showed antimicrobial and herbicidal properties. Algae, especially microalgae, represent a vast untapped resource for discovering novel and safe biopesticide compounds.

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“…Like terrestrial plants, marine biodiversity may prove to be a promising source of safe nematicidal agents. [44] As Ceriops tagal was never tested for nematicidal potential, it was selected for evaluation of its activity against larvae of cyst nematode H. zeae. On extraction with petroleum ether, aerial parts of the plant afforded an extract (CTP), which displayed promising nematicidal activity after exposure for 72 h. It was subjected to bioassay directed isolation studies employing classical solventsolvent separation, affording petroleum ether soluble (CTP-S) and insoluble fractions (CTP-IN).…”

Section: Composition and Characterizationmentioning

confidence: 99%

Bioassay Directed Fractionation of Petroleum Ether Extract of Aerial Parts of Ceriops tagal: Isolation of Lupeol as the Nematicidal Agent against Cyst Nematode Heterodera zeae

Ahmad

Faizi

Siddiqui

et al. 2022

Chemistry & Biodiversity

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Plant parasitic cyst nematode Heterodera zeae is a pest, causing substantial economic losses in agriculture. Organic pesticides, based on plant products have emerged as eco-benign nematicidal agents. Ceriops tagal is a well-known marine medicinal plant which has not been evaluated against any nematode. Petroleum ether extract of the aerial parts of the plant (CTP), exhibited promising activity against infective stage larvae of H. zeae. On subjecting to classical solvent-solvent separation, it afforded petroleum ether soluble (CTP-S), methanol soluble (CTPMS-1, CTPMS-2) and insoluble (CTPM-IN-2) fractions, which exhibited activity against the cyst nematode within 24 h exposure. GC, GC/MS and HR-ESI-MS analyses of CTPMS-1 and CTPMS-2 fractions resulted in the identification of a number of compounds, including pentacyclic triterpenoids, lupeol (1), betunal (2), betulin (3), lupenone (4), betulonaldehyde (5), betulonic acid (7), methyl 3-acetoxy-27-O-(3,4-dihydroxy-Ecinnamoyl)-20(29)-lupen-28-oate (8) and β-amyrin, along with phenylpropanoid esters, fatty acids and their derivatives, benzamide, and indole derivatives. CTPM-IN-2 which mainly contained lupeol (1) exhibited maximum nematicidal activity, with 91 % and 93 % mortality of the larvae of H. zeae, after exposure for 72 h at the concentration of 0.5 % and 1 %, respectively. Its fractionation and purification through column chromatography resulted in the isolation and identification of four lupane-type triterpenoids 1, 3, 4 and betulinic acid (6). One of its most abundant column fractions CC-9-18 (145 mg) which exhibited substantial activity, with 81 % mortality at the lowest concentration of 0.125 % after 48 h of incubation mainly contained lupeol. It seems lupeol, a wide spread bio-privileged triterpenoid is the nematicidal principle of the plant as its authentic sample showed LC 50 value of 0.061 after 72 h exposure. It is for the first time that nematicidal activity is reported for any part of C. tagal and that of lupeol against H. zeae. Pentacyclic triterpenoids 1-8 are biosynthetically related. Of the twenty-four compounds isolated or identified in the present investigation only five constituents 1, 3, 6, 7 and palmitic acid have been isolated previously from C. tagal.

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Marine Organisms for the Sustainable Management of Plant Parasitic Nematodes

Cited by 12 publications

References 66 publications

Evaluation of Baja Peninsula seaweeds against plant pathogens

Evaluation of Baja Peninsula seaweeds against plant pathogens

Algae and Their Metabolites as Potential Bio-Pesticides

Bioassay Directed Fractionation of Petroleum Ether Extract of Aerial Parts of Ceriops tagal: Isolation of Lupeol as the Nematicidal Agent against Cyst Nematode Heterodera zeae

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