生态学杂志2017，Vol.36Issue(5)：1259-1264,6.DOI:10.13292/j.1000-4890.201705.029
纳米TiO2对杉木种子萌发和幼苗生长及生理的影响
The effects of nano-TiO2 on seed germination, seedling growth and physiology of Chinese fir
摘要
Abstract
A study was carried out to investigate the effects of nano-TiO2 and regulation of nanometer materials on seed germination,seedling growth and physiology of Chinese fir under various concentrations of nano-TiO2 (50,100,500,1000 mg · L-1).It was revealed that seed germination rate,germination energy,germination index,vigor index were significantly affected by nanoTiO2.This effect was positively correlated with low concentration but high concentration decreased germination rate and seedling growth.The seed germination rate,germination energy,germination index,vigor index were maximum with nano-TiO2 at 100 mg · L-1,with an increase of 66％,92％,71％ and 299％ compared to the control.The fresh weight and root length of Chinese fir seedlings reached the maximum at the 100 mg · L-1 treatment,which were 35％ and 143％ higher than those of the control.In the 500 mg · L-1 treatment,CAT,SOD and POD activities reached the maximum,which were increased by 108％,488％ and 182％ respectively,but MDA content decreased by 82％ compared with the control.This study indicated that low concentrations of nano-TiO2 not only promoted seed germination and seedling growth,but also ultimately improved physiological function and might enhance the resistance of Chinese fir to adverse conditions.关键词
生长发育/形态可塑性/生理功能/抗氧化系统/纳米材料Key words
growth and development/morphological plasticity/physiological function/antioxidant system/nanometer material引用本文复制引用
李艳娟,庄正,刘青青,尚天赦,黄钦忠,邹嘉勇,刘博..纳米TiO2对杉木种子萌发和幼苗生长及生理的影响[J].生态学杂志,2017,36(5):1259-1264,6.基金项目
国家自然科学基金项目(31570448)和福建省高校新世纪优秀人才计划项目(K8015053A)资助. （31570448）
