期刊
MOLECULES
卷 27, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/molecules27072303
关键词
wheat; seedling; silver nanoparticles; ROS; metabolic profiles
资金
- project Advanced Biocomposites for Tomorrow's Economy BIOG-NET, FNP [POIR.04.04.00-00-1792/18-00]
- Foundation for Polish Science - European Union under the European Regional Development Fund
This study analyzed the effects of bio-synthesized silver nanoparticles on wheat germination, early seedling development, and metabolic profiles of different tissues. It found that silver nanoparticles inhibited the growth of coleoptile and affected the concentration of metabolites in roots, coleoptile, and endosperm.
Changes in the metabolome of germinating seeds and seedlings caused by metal nanoparticles are poorly understood. In the present study, the effects of bio-synthesized silver nanoparticles ((Bio)Ag NPs) on grains germination, early seedlings development, and metabolic profiles of roots, coleoptile, and endosperm of wheat were analyzed. Grains germinated well in (Bio)Ag NPs suspensions at the concentration in the range 10-40 mg/L. However, the growth of coleoptile was inhibited by 25%, regardless of (Bio)Ag NPs concentration tested, whereas the growth of roots gradually slowed down along with the increasing concentration of (Bio)Ag NPs. The deleterious effect of Ag NPs on roots was manifested by their shortening, thickening, browning of roots tips, epidermal cell death, progression from apical meristem up to root hairs zone, and the inhibition of root hair development. (Bio)Ag NPs stimulated ROS production in roots and affected the metabolic profiles of all tissues. Roots accumulated sucrose, maltose, 1-kestose, phosphoric acid, and some amino acids (i.e., proline, aspartate/asparagine, hydroxyproline, and branched-chain amino acids). In coleoptile and endosperm, contrary to roots, the concentration of most metabolites decreased. Moreover, coleoptile accumulated galactose. Changes in the concentration of polar metabolites in seedlings revealed the affection of primary metabolism, disturbances in the mobilization of storage materials, and a translocation of sugars and amino acids from the endosperm to growing seedlings.
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