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Enhancement of defense responses by <i>Clonostachys rosea</i>against Botrytis <i>cinerea</i>in tomatoes

Agricultural Sciences 2013年第12期4卷 709-714页

作者： liana dalcantara ongouya mouekouba Aijie Wang Zhenzhu Zhang Kehinde O. Erinle Xiuling Chen Aoxue Wang Colleges of Life Sciences Northeast Agricultural University Harbin China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin China Colleges of Life Sciences Northeast Agricultural University Harbin China

Clonostachys rosea (C. rosea) is a biocontrol agent that is used to combat and prevent phytopathogenic fungi attacks because of its ability to involve many factors and diverse modes of action. The reactions of C. rosea on the control of gray mold disease in tomato leaves were investigated in this study. To investigate the reactions of C. rosea in inducing resistance to tomato plants, three treatments, including Botrytis cinerea treatment (treatment B), C. rosea treatment (treatment C), C. rosea and B. cinerea treatment (treatment C + B) and water (control), to be applied on tomato leaves were set up. Disease severity was subsequently evaluated and compared with the control. The treatment of tomato leaves with C. rosea (15 μg/ml) significantly reduced the disease index after inoculation and severity of gray mold caused by Botrytis cinerea. The results indicated that the C. rosea treatment stimulated the activity of the defense related enzymes: Peroxidases (POX), lipoxygenases (LOX) and glutathione S-transferases (GST), and the treatment C + B reduced the incidence and severity of the gray mold. Furthermore, C. rosea treatment increased the activity of pathogenesis related proteins PR1. Therefore, our results suggest that C. rosea could enhance the resistance of tomato plants to gray mold through the activation of defense genes and via the enhancement of defense-related enzymatic activities.

关键词： Botrytis cinerea Clonostachys rosea Defense Enzymes Glutathione S-Transferases Li-poxygenases Peroxidases Pathogenesis Related

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Studies of the Variability of Primary Metabolites in the Epicarp, Mesocarp and Seed of Dacryodes edulis Fruit at Taste Maturity

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Advances in Biological Chemistry 2024年第2期14卷 64-72页

作者： Etou Ossibi Grace Jokael Mbon Nguékou Chrichina ongouya mouekouba dalcantara liana Mpika Joseph Attibayeba Biology Center Faculty of Applied Sciences (FSA) D&#233nis Sassou N&#8217guesso University Kint&#233l&#233 Congo Laboratory Biotechnology and Plant Production Faculty of Science and Technology Marien Ngouabi University Brazzaville Congo

The fruits of Dacryodes edulis are rich in biologically active substances, which makes them of great interest in terms of validation. In this study, we targeted the primary metabolites in the epicarp, the mesocarp and the seed of the fruit of Dacryodes edulis at taste maturity, which were selected for their nutritional quality and its appreciation throughout the Gulf of Guinea area, which is very popular because of its large size, texture and special taste. The evaluation of total carbohydrates, total lipids and soluble proteins in the epicarp, mesocarp and seed of the fruit at taste maturity was made from spectrophotometer measurements. The overall analysis of the results of the present study shows that total carbohydrates, total lipids and proteins accumulate more in the seed with respectively 251.33 ± 1.15 mg/g DM;9.92 ± 0.201 mg/g DM and 55.075 ± 0.024 mg/g DM. Likewise, the results indicate low concentrations of total carbohydrates and total lipids in the epicarp with respectively 245 ± 1 mg/g DM and 4.77 ± 0.047 mg/g DM, on the other hand, it is the mesocarp which presents the lowest content of soluble proteins: 28.075 ± 3.231 mg/g DM. This variation could be linked to the nature of the compartment, more particularly to the storage location. This comparative study could lead to the valorization of the seed of the fruit of Dacryodes edulis for its richness in metabolites and arouse significant interest in nutrition.

关键词： Dacryodes edulis Fruit Taste Maturity Epicarp Mesocarp Seed

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