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J Nanobiotechnology

Title:		Metabolomic analysis on the mechanism of nanoselenium alleviating cadmium stress and improving the pepper nutritional value
Author(s):		Li D; Zhou C; Li JQ; Dong Q; Miao P; Lin Y; Cheng H; Wang Y; Luo L; Pan C;
Address:		"Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, College of Plant Protection, Ministry of Education, Hainan University, Haikou, Hainan, 570228, People's Republic of China. Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China. Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Haikou, 570311, China. Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, 100193, China. canpingp@cau.edu.cn"
Journal Title:		J Nanobiotechnology
Year:		2022
Volume:		20221210
Issue:		1
Page Number:		523 -
DOI:		10.1186/s12951-022-01739-5
ISSN/ISBN:		1477-3155 (Electronic) 1477-3155 (Linking)
Abstract:		"Selenium (Se) maintains soil-plant homeostasis in the rhizosphere and regulates signaling molecules to mitigate cadmium (Cd) toxicity. However, there has been no systematic investigation of the effects of nano-selenium (nano-Se) on the regulation of non-target metabolites and nutritional components in pepper plants under Cd stress. This study investigated the effects of Cd-contaminated soil stress and nano-Se (1, 5, and 20 mg/L) on the metabolic mechanism, fruit nutritional quality, and volatile organic compounds (VOCs) composition of pepper plants. The screening of differential metabolites in roots and fruit showed that most were involved in amino acid metabolism and capsaicin production. Amino acids in roots (Pro, Trp, Arg, and Gln) and fruits (Phe, Glu, Pro, Arg, Trp, and Gln) were dramatically elevated by nano-Se biofortification. The expression of genes of the phenylpropane-branched fatty acid pathway (BCAT, Fat, AT3, HCT, and Kas) was induced by nano-Se (5 mg/L), increasing the levels of capsaicin (29.6%), nordihydrocapsaicin (44.2%), and dihydrocapsaicin (45.3%). VOCs (amyl alcohol, linalool oxide, E-2-heptaldehyde, 2-hexenal, ethyl crotonate, and 2-butanone) related to crop resistance and quality were markedly increased in correspondence with the nano-Se concentration. Therefore, nano-Se can improve the health of pepper plants by regulating the capsaicin metabolic pathway and modulating both amino acid and VOC contents"
Keywords:		Cadmium/chemistry *Selenium/chemistry *Soil Pollutants Nutritive Value Amino Acids Cd Nano-selenium Nutrient quality Pepper plants Stress-resistant pathway;
Notes:		"MedlineLi, Dong Zhou, Chunran Li, Jia-Qi Dong, Qinyong Miao, Peijuan Lin, Yongxi Cheng, Haiyan Wang, Yuwei Luo, Luna Pan, Canping eng (KF-2022004)/Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation/ England 2022/12/11 J Nanobiotechnology. 2022 Dec 10; 20(1):523. doi: 10.1186/s12951-022-01739-5"