Efficacité des extraits aqueux des plantes aromatiques et médicinales contre la pourriture grise de la tomate au Maroc

Kasmi, Manal; Aourach, Mohammed; Boukari, Mohammed El; Barrijal, Saïd; Essalmani, Haiat

doi:10.1016/j.crvi.2017.07.010

Cited by 17 publications

(10 citation statements)

References 32 publications

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“…Due to the abundance of tannins and saponins in the two plants studied and the antifungal activity of these secondary metabolites [18,38,39], it is useful to extract these two phytochemical groups and evaluate their antifungal activities on the strain of L. theobromae. From this figure the tannins have a higher yield than the saponins in the two plants.…”

Section: Phytochemical Groupsmentioning

confidence: 99%

Antifungal Activity on the Strain of Lasiodiplodia theobromae and Phytochemical Study of Ageratum conyzoides and Newbouldia laevis from the Kisangani Region / DR Congo

Kwembe

Mbula

Onautshu

et al. 2020

IJPR

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Aims: To extract, identify and evaluate in vitro the antifungal activity of the phytochemical groups of Ageratum conyzoides and Newbouldia laevis on the strain of Lasiodiplodia theobromae. Study Design: Exploitation of medicinal plants to combat the growth of L. theobromae, responsible for the decline of cocoa cultivation. Location and Duration of Studies: Faculty of Sciences, University of Kisangani, between April 2017 and February 2018. Methodology: The crude extracts of the dry leaves of A. conyzoides and N. laevis were tested (at 100 mg/mL). Potato dextrose agar was used as the culture medium. After chemical screening, abundant phytochemical groups were isolated and tested. Results: The aqueous, 95% ethanolic and ethereal crude extracts of A. conyzoides are more antifungal (respective percentages of inhibition PI: 80.74; 84.10 and 85.64%) than those of N. laevis (63.28; 72.64 and 75.23%). The minimum inhibitory concentration (MIC) of the aqueous crude extract of A. conyzoides is lower (25 mg/mL) than that of the ethanolic extract (50 mg/mL). Tannins are very abundant in A. conyzoides and in N. laevis. Saponins, sterols and terpenes are abundant in both plants. The extraction yields of tannins and saponins are respectively 20.67 and 2.43% in A. conyzoides and 10.47 and 2.38% in N. laevis. A. conyzoides contains the gallic tannins while N. laevis, the condensates and catechics. The saponins and tannins of A. conyzoides are more antifungal (respective PI: 84.40 and 54.44%) than those of N. laevis (PI: 75.56 and 32.96%). Discussion: The saponins of A. conyzoides and N. laevis are more active on the strain of L. theobromae than the tannins. Saponins are surfactants that can destabilize membrane structure of microorganisms including fungi. Conclusion: The saponins of the two plants have shown a very interesting antifungal power on the strain of L. theobromae. The identification of their active molecules is ongoing.

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Section: Phytochemical Groupsmentioning

confidence: 99%

Antifungal Activity on the Strain of Lasiodiplodia theobromae and Phytochemical Study of Ageratum conyzoides and Newbouldia laevis from the Kisangani Region / DR Congo

Kwembe

Mbula

Onautshu

et al. 2020

IJPR

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“…Além da atividade antimicrobiana, C. citratus possui atividade antifúngica comprovada (Bozik et al, 2017;Kasmi et al, 2017;Sharma et al, 2017;Xie et al, 2017).…”

Section: Discussionunclassified

Óleos essenciais e benzilaminopurina (BAP) para o cultivo in vitro de Dimorphandra mollis

et al. 2021

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A micropropagação é uma alternativa para a conservação genética de espécies endêmicas do Cerrado, como Dimorphandra mollis (fava-d’anta), possibilitando a maximização da propagação em elevada qualidade. Para solucionar os fatores limitantes ao cultivo in vitro de D. mollis, o presente trabalho teve como objetivo avaliar a eficiência de óleos essenciais como sanitizante e testar concentrações de regulador de crescimento benzilaminopurina (BAP) na fase de multiplicação in vitro. Sementes coletadas em população natural foram escarificadas e desinfestadas com hipoclorito de sódio e óleos essenciais de Lippia origanoides, Ocimum gratissimum, L. rotundifolia e Cymbopogon citratus, sendo posteriormente inoculadas em meio de cultura MS. A multiplicação in vitro foi avaliada em quatro concentrações de BAP (0,5; 1,0; 1,5 e 2,0 mg L-1). O óleo essencial de C. citratus se mostrou o mais adequado para a desinfestação de sementes da fava d’anta, na fase de estabelecimento in vitro. Fitoreguladores utilizados no presente estudo não promoveram resultados satisfatórios para definir um protocolo de multiplicação in vitro para a espécie.

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“…The inhibition of fungal diseases by aqueous extracts is due to natural organic compounds. The action is attributed to secondary metabolites such as polyphenols and triterpenoids [29].…”

Section: Phytochemical Screeningmentioning

confidence: 99%

“…The antifungal activity is due to their phytochemical composition. Polyphenols have demonstrated their antifungal capacity that is associated with the thiol group at the active site of the plant extract [29]. wich is responsible for the inactivation of enzymes [30].…”

Section: Phytochemical Screeningmentioning

confidence: 99%

Antifungal activity of plant extracts against tomato’s fungal diseases

Abbad

Aouji²,

Zelmat³

et al. 2023

E3S Web Conf.

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Fungal diseases have always been a major problem for tomato crops. Growers generally use chemical fungicides to treat this type of diseases. However, these products are toxic to the environment and the consumer, especially if the pre-harvest interval is not respected. The present study aims to find non-polluting alternatives. Five plant extracts (Peganum harmala, Ocimum basilicum, Caralluma europaea, Nerium oleander and Eucalyptus globulus) are tested for their in vitro efficiency against four pathogenic fungi: Alternaria solani, Botrytis cinerea, Botrytis cinerea taken from fruit, Phytophthora infestans and Oïdium oxysporum. The obtained results reveal that the extract of Ocimum basilicum is the most effective on the studied fungi. Indeed, at a concentration of 0.4%, it inhibited at 80% the development of Botrytis cinerea and at 81% Oïdium oxysporum at a concentration of 0.2%. Followed by Peganum harmala and Nerium oleander, which also showed an antifungal effect (Peganum harmala inhibited up to 73% of the growth of Alternaria solani at a dose of 4%). The extracts of Caralluma europaea and Eucalyptus globulus proved similar antifungal activity, which exceeded 30%. The study of the fungal/fungistatic effect revealed that all the studied extracts have a fungal effect against the treated fungi. The phytochemical screening showed that the plants extracts are rich in polyphenols especially Ocimum basilicum, Peganum harmala and Nerium oleander. This leads us to deduce that the antifungal activity may be due to this.

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Efficacité des extraits aqueux des plantes aromatiques et médicinales contre la pourriture grise de la tomate au Maroc

Cited by 17 publications

References 32 publications

Antifungal Activity on the Strain of Lasiodiplodia theobromae and Phytochemical Study of Ageratum conyzoides and Newbouldia laevis from the Kisangani Region / DR Congo

Antifungal Activity on the Strain of Lasiodiplodia theobromae and Phytochemical Study of Ageratum conyzoides and Newbouldia laevis from the Kisangani Region / DR Congo

Óleos essenciais e benzilaminopurina (BAP) para o cultivo in vitro de Dimorphandra mollis

Antifungal activity of plant extracts against tomato’s fungal diseases

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