RESUMO
The environmental and health risks associated with the application of synthetic chemical inputs in agriculture increased the demand for technologies that allow higher performance and quality of vegetable crops by implementing synergistic materials with the principles of sustainability. In this work, the seed coating with the biomass of Dunaliella salina incorporated in a bioplastic film of Manihot esculenta (cassava) was evaluated as an initial growth and secondary compounds stimulator of Coriandrum sativum (coriander) plants. The obtained results demonstrated that the coating stimulated an increase in the germination percentage (28.75%) and also in concentration of bioactive compounds, such as the six-fold increment of caffeic acid (13.33 mg 100 g-1). The carbohydrates, lipids, and proteins present in the microalgae biomass seem to be responsible for these increments once they are known for providing energy to the seedling development and coordinating the secondary metabolites synthesis. As conclusion, we consider the coating with biomass of D. salina an alternative for crop improvement that contributes to the development of sustainable agricultural practices.
Assuntos
Biomassa , Clorofíceas , Coriandrum , Microalgas , Desenvolvimento Vegetal , Metabolismo Secundário , Sementes , Ácidos Cafeicos , Carboidratos , Clorofíceas/química , Coriandrum/química , Coriandrum/efeitos dos fármacos , Coriandrum/crescimento & desenvolvimento , Coriandrum/metabolismo , Produção Agrícola/métodos , Lipídeos , Manihot/química , Microalgas/química , Desenvolvimento Vegetal/efeitos dos fármacos , Metabolismo Secundário/efeitos dos fármacos , Sementes/química , Sementes/efeitos dos fármacos , Sementes/crescimento & desenvolvimento , Sementes/metabolismo , Desenvolvimento SustentávelRESUMO
Studies have shown that CeO2 nanoparticles (NPs) can be accumulated in plants without modification, which could pose a threat for human health. In this research, cilantro (Coriandrum sativum L.) plants were germinated and grown for 30 days in soil amended with 0 to 500 mg kg⻹ CeO2 NPs and analyzed by spectroscopic techniques and biochemical assays. At 125 mg kg⻹, plants produced longer roots (p ≤ 0.05), and at 500 mg kg⻹, there was higher Ce accumulation in tissues (p ≤ 0.05). At 125 mg, catalase activity significantly increased in shoots and ascorbate peroxidase in roots (p ≤ 0.05). The FTIR analyses revealed that at 125 mg kg⻹ the CeO2 NPs changed the chemical environment of carbohydrates in cilantro shoots, for which changes in the area of the stretching frequencies were observed. This suggests that the CeO2 NPs could change the nutritional properties of cilantro.