Resumo

TUCUCH-PEREZ, Marco Antonio et al. Enzymatic activity in Sorghum bicolor by micro-nano encapsulated microbial metabolites and plant extracts. Rev. Mex. Cienc. Agríc [online]. 2025, vol.16, n.5, e3755.  Epub 27-Out-2025. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v16i5.3755.

Chemical herbicides for weed control represent a current problem, since their indiscriminate use causes the emergence of resistant weed populations, in addition to affecting the environment and human health. Therefore, secondary metabolites of microorganisms and plant extracts in micro-nano encapsulated formulations emerge as a possible alternative to the use of chemically synthesized herbicides. Therefore, elucidating their mechanism of action is necessary to understand the biochemical changes they induce in plants and to develop weed control strategies. The objective of the research was to determine the activity of the antioxidant enzymes phenylalanine ammonia lyase, peroxidase, and superoxide dismutase in Sorghum bicolor plants treated with secondary metabolites of Alternaria sp. The secondary metabolites of microorganisms and a plant extract of Solanum rostratum, alone and formulated in micro-nano encapsulated formulations based on the biopolymer’s alginate and chitosan. The study was carried out during the month of June 2024, for this, S. bicolor y plants were used and the activity of the enzymes was determined for 0, 3, 6, 12, 24 and 48 h. It was observed that the formulations loaded with the Solanum rostratum plant extract and the secondary metabolites of microorganisms were those that induced the highest enzymatic activity at different times, reaching 0.36 and 0.34 U mol-1 respectively in the case of PAL, 4.7 and 4.3 U mol-1 with the peroxidase enzyme and 7.3 and 6.5 U mol-1 with super oxide dismutase. It is concluded that the secondary metabolites of microorganisms and the Solanum rostratum plant extract formulated in micro-nano encapsulates have potential as agents that can modify biochemical processes in plants.

Palavras-chave : bioherbicides; metabolites; nanotechnology; plant extracts.

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