Moringa (Moringa oleifera) leaf extracts inhibit spore germination ofAlternaria solani, causal agent of early blight disease of tomato (Solanum lycopersicum)

Mvumi, Culver; Ngadze, Elizabeth; Marais, D.; Toit, E.S. du; Mvumi, Brighton M.

doi:10.1080/02571862.2016.1266401

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…Moreover, numerous phenolic acids and phenolic-rich extracts exhibited high inhibitory effects on the radial growth of fungi [18,47]. Although considerable attempts have been made using naturally phenolic-rich products against Alternaria alternata [19][20][21][22][48][49][50][51], very few reports are available about their roles against A. solani. Nevertheless, the physiological and biochemical mechanisms behind this role are poorly understood.…”

Section: Discussionmentioning

confidence: 99%

The Antifungal Activity of Gallic Acid and Its Derivatives against Alternaria solani, the Causal Agent of Tomato Early Blight

et al. 2020

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Tomato (Solanum lycopersicum L.) is among the most important vegetable crops worldwide. Early blight disease, caused by Alternaria solani, is a destructive foliar disease of tomato and other Solanaceae species. Herein, we investigated the in vitro antifungal properties of gallic acid and two of its derivatives (syringic and pyrogallic acids) against A. solani during 2019 and 2020 seasons. The physiological and biochemical effects of these compounds on infected tomato plants were also investigated using the whole plant bioassay. The in vitro investigation showed that all tested compounds showed fungistatic action and inhibited the mycelial radial growth of A. solani in a dose-dependent manner. In two separate pot-experiments, those compounds efficiently suppressed the development of the disease symptoms and area under disease progress curve (AUDPC), without any phytotoxic effects on the treated tomato plants. Additionally, all tested compounds positively enhanced the biochemical traits of treated plants including the chlorophyll content, the total soluble phenolics, the total soluble flavonoids, and the enzymatic activities of catalase, peroxidase, and polyphenol oxidase during 2019 and 2020 seasons. Moreover, the treatment with gallic acid and its derivatives significantly increased all yield components of A. solani-infected tomato plants such as the total number of flowers and fruits, and the fruit yield for each tomato plant in both experiments. Considering the fungitoxicity of phenolic acids against A. solani with no phytotoxicity on treated tomato plants, we believe that gallic acid and its derivatives might be a sustainable eco-friendly control strategy to reduce the usage of chemical fungicides partially or entirely against A. solani particularly, and fungal diseases in general.

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Section: Discussionmentioning

confidence: 99%

The Antifungal Activity of Gallic Acid and Its Derivatives against Alternaria solani, the Causal Agent of Tomato Early Blight

et al. 2020

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“…Doses concentration augmentation involve amplify in the solution the bioactive compounds that play its role as antifungal on the target fungal satins. Polar extracts, like aqueous and ethanol were high energetic as compared to non-polar extracts such as chloroform (Culver et al, 2017). The neem leaves extracts (aqueous and ethanol) showed spore inhibition against fungal pathogens of tea (Saha et al, 2005).…”

Section: Biofungicide Potentialmentioning

confidence: 98%

Evaluation of some bioactive compounds of Azadirachta indica extracts and its application as safe fungicide against different plant pathogenic fungi

Ali,

Hussain,

Siddique

et al. 2023

Int. J. Eng. Sci. Tech

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Extracts of leaves, seeds and twigs of Azadirachta indica was carried out using Soxhlet extraction technique. These extracts were subjected to percent yield, in vitro phytochemical screening and antifungal activities (minimum fungicidal concentration (MFC), minimum inhibitory concentration (MIC), zone of inhibition and spore germination assay) against plant pathogenic fungi Cladosporium fulvum, Colletotrichum coccodes, Fusarium oxysporum and Rhizoctonia solani. The Soxhlet extractive solvents were methanol, ethanol, chloroform, ethyl acetate and n–hexane. The maximum extractive yield were calculated in ethanol leaves (26±1.5%), methanol leaves (22±01%), n–hexane seeds (32±0.8%) and ethanol seeds (24±01%), while twigs calculated minimum extractive yield. The phytochemicals screening findings confirmed the occurrence of terpenoids, phenols, flavonoids, glycosides, alkaloids, tannins and saponins. The antifungal activities observed that leaves and seeds extracts of neem might cause the inhibition of mycelium and spore germination of tested fungi, though the antifungal activities rate of under study fungal strains diverse with dissimilar concentration and nature of extracts. However the entire concentrations of extract and crude extract especially the methanol and ethanol extracts of neem seeds and leaves reduce the plant pathogenic fungi growth at noteworthy rate. It was concluded from our results that neem leaves and seeds extracts were effectual as antifungal agents against the entire under study fungal strains however the most sensitive fungi were Rhizoctonia solani and Fusarium oxysporum. The findings acquired from this study revealed that chemical constituents from neem seeds and leaves may be formulated as latent agrochemical fungicides.

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“…In recent times, postharvest horticulturists have shown keen interest in the management of papaya postharvest losses through eco‐friendly edible coatings. A major advantage of this approach is that it reduces the need for chemical fungicides, which can be harmful to human health and contribute to pathogen resistance (Mvumi et al., 2017). Additionally, papaya consignments can be rejected if chemical residues exceed the permissible limits (Agricultural and Processed Food Products Export Development Authority (APEDA), Ministry of Commerce, Government of India, 2021).…”

Section: Introductionmentioning

confidence: 99%

Eco‐safe composite edible coating of hydrocolloids with papaya leaf extract improves postharvest quality and shelf life of papaya fruit under ambient storage

Prasad,

Akshatha,

Pradhan

et al. 2023

Journal of Food Science

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Papaya postharvest management using low‐temperature storage is discouraged as it is a tropical fruit. Extensive research is going on to preserve papaya quality at ambient storage using edible coatings and its composites. The present investigation examined the effects of an eco‐safe composite edible coating consisting of hydrocolloid carboxymethyl cellulose (CMC) (1%), guar gum (1.5%), xanthan gum (0.3%), and Gum Arabic (10%) combined with papaya leaf extract (PLE) (1:1 ratio by volume) applied as dip treatment on “Red Lady” papaya fruit at ambient storage condition. Among all the attempted treatments, “PLE incorporated with CMC (1%)” was found to be the best, as the treated fruit exhibited the highest levels of biochemicals, whereas the lowest levels of physiological and enzymatic activity, which positively affected the shelf life. The “CMC + PLE” treatment enhanced the fruit gloss score by 70.1%, phenolics by 6.1%, ascorbic acid by 22.3%, total carotenoid content by 7.4%, and fruit predilection score by 22.0% over the control fruit. However, it lowered (controlling) the physiological loss in weight by 51.0%, decay incidence by 66.6%, and polygalacturonase and pectin methylesterase activity by 24.92% and 35.29%, respectively, over control. Moreover, this treatment exhibited the highest fruit purchase predilection score and prolonged the storage life for >3 days on the physiological loss standard basis (≤10%). This study indicates that “CMC (1%) with PLE (1:1)” composite coating application on papaya under ambient conditions might be an effective, environmentally friendly, and health‐friendly way to retain the quality and extend the storage life.

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Moringa (Moringa oleifera) leaf extracts inhibit spore germination ofAlternaria solani, causal agent of early blight disease of tomato (Solanum lycopersicum)

Cited by 7 publications

References 11 publications

The Antifungal Activity of Gallic Acid and Its Derivatives against Alternaria solani, the Causal Agent of Tomato Early Blight

The Antifungal Activity of Gallic Acid and Its Derivatives against Alternaria solani, the Causal Agent of Tomato Early Blight

Evaluation of some bioactive compounds of <i>Azadirachta indica</i> extracts and its application as safe fungicide against different plant pathogenic fungi

Eco‐safe composite edible coating of hydrocolloids with papaya leaf extract improves postharvest quality and shelf life of papaya fruit under ambient storage

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