ICP-MS Based Metallomics and GC-MS Based Metabolomics Reveals the Physiological and Metabolic Responses of Plants Exposed to FeO Nanoparticles
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It is found that the growth of was dependent on FeO, while the bioavailability of plants to ordinary FeO was low on the earth. In order to improve the growth, quality and yield of , we used FeO NPs (100 or 200 mg/L) that was easily absorbed by plants as nano-fertilizer to hydroponically treat seedlings of for 3 weeks. FeO NPs induced not only earlier flowering and increased sugar content and photosynthesis, but also stressed to plants, increased MDA content and related antioxidant enzymes activities. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) revealed that FeO NPs caused a significant accumulation of Fe and some other nutrient elements (Mn, Co, B, Mo) in stems of . Metabolomics revealed that the metabolites were reprogrammed in when under FeO NPs exposure. FeO NPs inhibited antioxidant defense-related pathways, demonstrating that FeO NPs have antioxidant capacity to protect from damage. As the first study associating FeO NPs with the quality of , it provided vital insights into the molecular mechanisms of how responds to FeO NPs, ensuring the reasonable use of FeO NPs as nano-fertilizer.
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