Selenium(Se)deficiency is a global health problem affecting more than 500 million people;crop biofortification is a sustainable strategy for its mitigation.This study investigated the effect of the application of sele...Selenium(Se)deficiency is a global health problem affecting more than 500 million people;crop biofortification is a sustainable strategy for its mitigation.This study investigated the effect of the application of selenate nanoparticles(SeO_(4)^(2−))and the combination of selenate(SeO_(4)^(2−))and chitosan(CS)(forming a SeO_(4)^(2−)-CS complex)on the antioxidant profile,growth,biomass,bioactive compounds,enzymes,and Se accumulation of wheat(Triticum spp.)sprouts.Fourteen treatments were applied using a factorial design combining seven concentrations and two formulations:SeO_(4)^(2−)and SeO_(4)^(2−)-CS.It was identified that chitosan increased Se uptake efficiency by 30%versus conventional selenate.The optimal dose for biomass was 0.15 mg L^(−1) of SeO_(4)^(2−)-CS(+40%vs.control),while 0.25 mg L^(−1) maximized bioactive compounds(phenolics(25%)and flavonoids(21%))as well as antioxidant capacity(26%)and enzymatic activity(SOD:37%;POD:41%).In addition,CS reduced Se phytotoxicity at doses≥1.50 mg L^(−1),evidencing its dual role as a delivery vehicle and cell protector.These findings demonstrate that the SeO_(4)^(2−)-CS hybrid system is a technologically viable and efficient alternative to traditional selenate for the production of biofortified sprouts.This strategy shows high potential for scaling up in the functional food industry and for application in agricultural regions with selenium-deficient soils.展开更多
Biodegradable nanoparticles such as chitosan nanoparticles (CSNPs) are used in sustainable agriculture since theyavoid damage to the environment;CSNPs have positive effects such as the accumulation of bioactive compou...Biodegradable nanoparticles such as chitosan nanoparticles (CSNPs) are used in sustainable agriculture since theyavoid damage to the environment;CSNPs have positive effects such as the accumulation of bioactive compoundsand increased productivity in plants. This study aimed to investigate the impact of applying CSNPs on lettuce,specifically focusing on enzymatic activity, bioactive compounds, and yield. The trial was conducted using a completelyrandomized design, incorporating CSNPs: 0, 0.05, 0.1, 0.2, 0.4, and 0.8 mg mL−1. The doses of 0.4 mg mL−1improve yields up to 24.6% increases and 0.1 mg mL−1 of CSNPs increases total phenols by 31.2% and antioxidantcapacity by 34.6%. In addition, when low concentrations of CSNPs (0.05 and 0.1 mg L−1) were applied, anincrease in catalase was determined. The CSNPs represent a good alternative to be used as a biostimulant in sustainableagriculture because they improve the yield and quality of lettuce by increasing the bioactive compounds.展开更多
文摘Selenium(Se)deficiency is a global health problem affecting more than 500 million people;crop biofortification is a sustainable strategy for its mitigation.This study investigated the effect of the application of selenate nanoparticles(SeO_(4)^(2−))and the combination of selenate(SeO_(4)^(2−))and chitosan(CS)(forming a SeO_(4)^(2−)-CS complex)on the antioxidant profile,growth,biomass,bioactive compounds,enzymes,and Se accumulation of wheat(Triticum spp.)sprouts.Fourteen treatments were applied using a factorial design combining seven concentrations and two formulations:SeO_(4)^(2−)and SeO_(4)^(2−)-CS.It was identified that chitosan increased Se uptake efficiency by 30%versus conventional selenate.The optimal dose for biomass was 0.15 mg L^(−1) of SeO_(4)^(2−)-CS(+40%vs.control),while 0.25 mg L^(−1) maximized bioactive compounds(phenolics(25%)and flavonoids(21%))as well as antioxidant capacity(26%)and enzymatic activity(SOD:37%;POD:41%).In addition,CS reduced Se phytotoxicity at doses≥1.50 mg L^(−1),evidencing its dual role as a delivery vehicle and cell protector.These findings demonstrate that the SeO_(4)^(2−)-CS hybrid system is a technologically viable and efficient alternative to traditional selenate for the production of biofortified sprouts.This strategy shows high potential for scaling up in the functional food industry and for application in agricultural regions with selenium-deficient soils.
基金through Project A-1-S-20923 and Grant No.725753 from S.C.Ramírez Rodríguez.
文摘Biodegradable nanoparticles such as chitosan nanoparticles (CSNPs) are used in sustainable agriculture since theyavoid damage to the environment;CSNPs have positive effects such as the accumulation of bioactive compoundsand increased productivity in plants. This study aimed to investigate the impact of applying CSNPs on lettuce,specifically focusing on enzymatic activity, bioactive compounds, and yield. The trial was conducted using a completelyrandomized design, incorporating CSNPs: 0, 0.05, 0.1, 0.2, 0.4, and 0.8 mg mL−1. The doses of 0.4 mg mL−1improve yields up to 24.6% increases and 0.1 mg mL−1 of CSNPs increases total phenols by 31.2% and antioxidantcapacity by 34.6%. In addition, when low concentrations of CSNPs (0.05 and 0.1 mg L−1) were applied, anincrease in catalase was determined. The CSNPs represent a good alternative to be used as a biostimulant in sustainableagriculture because they improve the yield and quality of lettuce by increasing the bioactive compounds.
