期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 164, 期 -, 页码 122-131出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2021.04.019
关键词
Maize; Iminofullerene; Osmotic stress; Root elongation; Reactive oxygen species
资金
- Natural Science Foundation of Henan Province of China [162300410154]
- Science and Technologies Program of Henan Province, China [172102110043]
- Key Laboratory of Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences [NSKF201907]
- Training Program for Young Backbone Teachers in Universities of Henan Province, China [2016GGJS-035]
- Special Innovation Project of Henan Agricultural University [KJCX2020C02]
The study demonstrated that IFQA can promote plant seedlings' root growth, positively influence root active absorption and protein expression, and enhance plants' tolerance to osmotic stress.
In the present study, the role of quaternary ammonium iminofullerenes (IFQA) on the root growth of plant seedlings was investigated. The root elongation of Arabidopsis and maize exposed to 20 and 50 mg/L of IFQA was promoted under normal and osmotic stress conditions, respectively. In the meantime, the root active absorption area and adenosine triphosphate content in roots of maize seedlings were enhanced by IFQA treatment, however, the contents of hydrogen peroxide (H2O2) and malondialdehyde in roots were down-regulated. IFQA application improved glutathione transferase and glutathione reductase activities and the ratios of glutathione/oxidized glutathione and ascorbic acid/dehydroascorbic acid, and restored the inhibition of root elongation caused by the excess accumulation of H2O2 in roots of maize seedlings under osmotic stress. Furthermore, the expression of 14 proteins involved in cell growth, energy metabolism, and stress response in maize roots was upregulated by twodimensional electrophoresis combined with mass spectrometry. This analysis revealed that IFQA stimulated the redox pathway to maintain balance levels of reactive oxygen species to ensure normal cell metabolism, promote energy production for root growth, and enhance osmotic-stress tolerance. It provided crucial information to elucidate the mechanism of the root growth of crop seedlings enhanced by water-soluble fullerene-based nanomaterials.
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