Jéssica de Cássia Tomasi, Natalia Saudade de Aguiar, Manoela Mendes Duarte, Mônica Moreno Gabira, Leandro Marcolino Vieira, Volnei Pauletti, Luziane Franciscon, Cristiane Vieira Helm, Cicero Deschamps, Ivar Wendling
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引用次数: 0
Abstract
AbstractSection Purpose
Yerba mate (Ilex paraguariensis A.St.-Hil.) can provide many valuable phytochemicals such as methylxanthines, caffeine and theobromine, and caffeoylquinic acids (CQA or CGA– chlorogenic acids). It is necessary to establish cultivation protocols to meet the demand for raw materials with specific phytochemical profiles.
AbstractSection Methods
In this study, we analyzed the content and yield of bioactive compounds in leaves of two yerba mate clones submitted to increasing concentrations of nitrogen for two years in a semi-hydroponic cultivation system. The leaves were classified as young or mature and ground after drying in a microwave. The aqueous extracts were analyzed using an Ultra-Fast Liquid Chromatograph (UFLC). The yield was calculated by multiplying compound contents by the leaf dry mass.
AbstractSection Results
Young leaves had higher contents of all compounds than mature leaves. Clone EC40 showed higher contents of caffeine, 4-CQA, and 5-CQA, and this genotype showed a higher yield of all compounds, except for theobromine, when compared to EC22. Increasing nitrogen concentration increased methylxanthines contents; however, the yield of compounds decreased with higher N concentration due to reduced leaf mass production. At the concentration of maximum productivity, 206 mg L-1 of N, the compound yield reached up to 21 g m-2 year-1 of caffeine, and 126 g m-2 year-1 of CQAs in clone EC40.
AbstractSection Conclusion
These results demonstrate that the proposed cultivation system is viable, especially with the industrial purpose of extracting yerba mate bioactive compounds. The increase of N in this system does not favor the productivity of bioactive compounds, as it reduces leaf production. The most viable way to suit the desired level of these bioactive compounds in yerba mate leaves seems to be by selecting leaves and clones.
期刊介绍:
The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science.
Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration.
Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies.
Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome.
The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.