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Effect of Biostimulants Based on Natural Products on the Growth and Nutritional Value of Bean (Phaseolus vulgaris L.)

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American Journal of Plant Sciences 2024年第7期15卷 492-518页

作者： Aimé Giresse Tzeuton Flore Eliane Eyenga Arouna Meshuneke Gaston Mbang Elock Fabrice Damien Wassom Walter Jospin Timma Kom marie paule djam kengoum Erica Cabrelle Damtse Damtse Landry Silatsa Fotsing William Asah Che Marlyne Josephine Mananga Nicolas Niemenak Cécile Annie Ewané Laboratory of Plant Physiology and Biochemistry Higher Teachers Training College University of Yaound 1 Yaound Cameroon Department of Biochemistry Faculty of Sciences University of Yaound 1 Yaound Cameroon Laboratory of Food Sciences and Metabolism University of Yaoundé 1 Yaoundé Cameroon Laboratory of Phytoprotection and Valorisation of Genetic Resources of the Biotechnology Centre University of Yaound 1 Yaound Cameroon Department of Biological Sciences Higher Teachers Training College University of Yaound 1 Yaound Cameroon

Beans (Phaseolus vulgaris L.) are widely grown in Cameroon and play a key role in the fight against food insecurity, malnutrition and poverty. However, its cultivation encounters problems due to abiotic and biotic stresses, which leads to the use of synthetic fertilizers and pesticides, which cause significant damage to the environment and human health due to the presence of synthetics residues in the seeds, pods and in the leaves that are eaten. Promoting the use of natural products is becoming a necessity for organic and eco-responsible agriculture that limits contamination problems and improves people’s purchasing power. This study aims to assess the effect of biostimulants based on natural products on the growth and nutritional value of common bean (Phaseolus vulgaris L.). Bean seedlings from white variety (MEX-142) and red variety (DOR-701) were treated every seven days in the field from their pre-emergence, emergence and growth to their maturation under a randomized block experimental design. Six treatments and three repetitions with the biostimulants based on natural products and controls were thus performed and the agromorphological parameters were measured. After 120 days, the contents of growth biomarkers and defense-related enzymes were evaluated in leaves, while the contents of macromolecules, minerals and antinutrients were evaluated in seeds. These biostimulants significantly increased (P P < 0.0001) of antinutrients including oxalates, phytates, tannins and saponins in seeds compared to controls (T+ and T−). Treatment with biostimulants, in particular BS4, improves the performance of bean plants in the field as well as the biofortification of seeds regardless of the variety.

关键词： Phaseolus vulgaris L. Biostimulants Biofortification Growth and Defense Biomarkers Nutritional Value

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Stimulatory Effect of Tithonya diversifolia-by Products on Plantain Banana Vivoplants in Nursery (A Review)

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American Journal of Plant Sciences 2024年第9期15卷 726-745页

作者： Cécile Annie Ewané Arouna Meshuneke Gaston Elock Mbang Fabrice Damien Wassom William Asah Che Glen Takang Beyang Craftsman Ndula Ndula-Nan Landry Fotsing Silatsa Jospin Walter Kom Timma marie-paule kengoum djam Rosine Arckange Barakielle Bindzi Abah Nicolas Niemenak Department of Biochemistry Faculty of Science University of Yaounde 1 Yaounde Cameroon Laboratory of Biochemistry and Vegetal Physiology of Higher Teachers Training College University of Yaounde 1 Yaounde Cameroon Laboratory of Phytoprotection and Valorisation of Genetic Resources of The Biotechnology Centre University of Yaounde 1 Yaounde Cameroon Department of Biological Science Higher Teachers Training College University of Yaounde 1 Yaounde Cameroon

Plantain banana is an important cash crop that serves as stable food for millions of people around the world and contributes to income generation. Indeed, they provide a major staple food crop for millions of people and play an important role in the social fabric of many rural communities. Plantain banana cultivation encounters major problem of seedlings unavailability that are essential for the creation of new plantations, as well as parasitic constraints. Mycosphaerella fijiensis is the main pathogen attack constraints of banana plant responsible of black Sigatoka disease, and viruses, which can severely reduce the photosynthetic leaf area, leading to banana production losses of more than 80% in plantations with soil fertility problems. The repeated use of synthetic input is the origin of contamination to the environment, different pollution sources of plants and human health, as well as resistance to some strains of pathogens and plant fertilization problems over time. Recent works carried out in nursery have shown that vivoplants of plantains treated with biostimulants based on natural products notably Tithonia diversifolia biopromote good growth and less susceptibility to M. fijiensis. Indeed, an increase in agromorphological characteristics, good accumulation of growth and defense biomarkers was also observed. In this context, Tithonia diversifolia is shown to be involved in the stimulatory effect mechanism of growth promotion and defensive reaction of plantain vivoplants against various pathogens and it is suggested to be acting as a vital stimulator. This article reviews the current state of knowledge on plantain banana cultivation constraints and on the potential of Tithonia diversifolia in relation with its different stimulatory effects on plantain vivoplants.

关键词： Tithonia diversifolia Plantain Banana Black Sigatoka Disease Growth Biopromotion Bioprotection Induced Resistance Biofungicidal Effect

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