Mechanisms of growth-promotion and Se-enrichment inBrassica chinensisL. by selenium nanomaterials: beneficial rhizosphere microorganisms, nutrient availability, and photosynthesis

Abstract

Maintaining a proper content of selenium (Se) in food is particularly important for human health. However, the mechanisms of uptake and enrichment of Se ENMs in crops are still unclear....

Aloe Vera Extract Gel-Biosynthesized Selenium Nanoparticles Enhance Disease Resistance in Lettuce by Modulating the Metabolite Profile and Bacterial Endophytes Composition

“…4 The dissolved organic carbon in the soil extracts likely adsorbed on NPs surface, which resulted in increased electrostatic and steric stability and thus reduced aggregation of particles in soil solutions, thus facilitating continuous dissolution of the particles. 20 Notably, Se NPs may also facilitate microbial growth, 21 which may further increase the possibility of microbial-induced Se oxidation and dissolution in the soil extract. Effects of Se NPs on Lettuce Growth.…”

“…A few recent studies have explored the use of NPs to control beneficial rhizosphere microbes and promote plant growth. For example, Wang et al found that Se NPs at 0.5 mg/kg in soil improved the abundance of beneficial rhizosphere Pseudomonas and Bacillus, which contributed to Se uptake and yield increase in Brassica Chinensis L. 21 Similarly, long-term exposure to 50 mg/kg of Ag NPs was reported to alter the structure and composition of the bacterial community in the lettuce rhizosphere, potentially by regulation of bacterial groups associated with nutrient (e.g., N and S) cycling and stress tolerance. 48 Our results suggest that the abundance of bacterial endophytes associated with plant N assimilation (e.g., Azospirillum, Paenibacillus, and Allorhizobium-Neorhizobium-Parahizobium-Rhizobium) was significantly improved by Se NPs in F.o.…”

Selenium nanomaterials induce flower enlargement and improve the nutritional quality of cherry tomatoes: pot and field experiments

“…[1][2][3] Improving nutritional status, enhancing resistance, and regulating gene expression in plants could be achieved by engineered nanomaterials (ENMs). [4][5][6] Besides, nanoscale agrochemicals are typically 20-30% more effective than conventional products in agricultural applications. 7 Tomatoes (Solanum lycopersicum L.) are one of the most widely consumed economic crops, and global tomato production reached 180.8 million tons in 2019.…”

“…1–3 Improving nutritional status, enhancing resistance, and regulating gene expression in plants could be achieved by engineered nanomaterials (ENMs). 4–6 Besides, nanoscale agrochemicals are typically 20–30% more effective than conventional products in agricultural applications. 7…”

“…18 SiO 2 ENMs (20 mg L −1 ) could improve photosynthesis and enhance sugar (C) and amino acid (N) metabolism to increase the resistance of peas to Phelipanche aegyptiaca . 19 Besides, selenium (Se) ENMs (0.5 mg L −1 ) could enhance the nutrient bioavailability to improve photosynthesis (16.7%) and up-regulate the expression of carbohydrate transport-related genes ( BnSUC1,1 , BnSUC1,4 , and BnSWEET10,2 ) in Brassica chinensis L. 4 Se, as a functional element, plays a critical role in human health because of its antioxidation and anticarcinogenic effects as well as immune function. 20 Se ENM-enabled agriculture strategies have gained much attention due to their high surface activity and low toxicity compared with inorganic forms (selenate and selenite).…”