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Isolation and Identification of Cardenolide Compounds of Gomphocarpus sinaicus and Their Fungicidal Activity Against Soil Borne and Post Harvest Fungi

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Journal of Life Sciences 2012年第9期6卷 985-994页

作者： Moustafa A. Abbassy Ezzat A. Kadous EL-Sayed A.M. Abd-Allah Gehan I.Kh. Marei Department of Plant Protection Faculty of Agriculture Damanhour University AI-Behera Egypt

This study was undertaken to explore new antifungal compounds from the methanolic extract of G. sinaicus. Two cardenolide compounds were isolated and identified by GC-MS as cardenolide glycoside, 15-hydroxy-3,4,5,6-dehydrocalotropin and cardenolide genin, 3,4,5,6-dehydrocalotropagenin. The antifungal activity of these compounds was assessed. Results revealed that both compounds showed pronounced fungicidal activity against both soil borne fungi, R. solani, F. oxysporium, and postharvest fungi, R. stolonifer, P. digtatum, compared to the standard fungicides, flutolanil and copper oxychloride, respectively. The ECs0 values of the cardenolide genin were 0.703, 13.63 and 4.22, 8.403 lag/mL forR. solani, F. oxysporium andR. stolonifer, P. digtatum respectively. On the other hand, the ECs0 values of the standard fungicide, flutolanil, were 9.49 and 61.22 ~tg/mL against R. solani and F. oxysporium. While the ECso values of copper oxychloride were 279.94 and 187.13 p.g/mL against R. stolonifer and P. digtatum, respectively. The results showed that cellulase, PME, PPO of the tested fungi was more sensitive than to cardenolide genin. The strong antifungal activity of cardenolide genin reported in this study indicated that has a potential to be used as fungicides.

关键词： Gomphocarpus sinaicus cardenolide glucosides fungicidal activity fungitoxicity enzymes

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Biological Activity of <i>Syzygium aromaticum</i>and <i>Ravensara aromatica</i>Essential Oils from Madagascar and Their Possible Use against Postharvest Mango Anthracnose

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American Journal of Plant Sciences 2020年第11期11卷 1682-1697页

作者： Soloniony Navalonamanitra Andrianjafinandrasana Marc Chillet Isabelle Ratsimiala Ramonta Jean-Michel Leong Pock Tsy Jerôme Minier Pascal Danthu Université d’Antananarivo Sciences et Technologies Sciences de la Vie et de l’Environnement Biotechnologie Antananarivo Madagascar DP Forêts & Biodiversité Antananarivo Madagascar Cirad Persyst UMR Qualisud 7 Chemin de l’IRAT 97410 SAINT PIERRE La Réunion UMR Qualisud Université de Montpellier CIRAD Université de la Réunion Montpellier SupAgro Université d’Avignon et des Pays de Vaucluse Montpellier France Département des Recherches Forestières et Gestion Ressources Naturelles-FOFIFA Antananarivo Madagascar Cirad UPR HortSys Université de Montpellier Montpellier France

The fungitoxicity of five Malagasy essential oils (Eos) against Colletotrichum asianum was assessed in terms of conidial germination and mycelial growth. Their effect on defense-related compounds content, physicochemical properties and anthracnose lesions in mango fruits was also determined. Four of the tested Eos were from Ravensara aromatica leaves, and the last Eo was extracted from clove leaves. Their chemical compositions were then determined through GC-MS analysis and the active compound of the most fungitoxic Eo was determined by testing the toxicity of its major component to C. asianums spore germination, mycelial

关键词： Biological Activity Syzygium aromaticum Ravensara aromatic fungitoxicity Anthracnose Essential Oils

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