生态科学2018，Vol.37Issue(6)：9-19,11.DOI:10.14108/j.cnki.1008-8873.2018.06.002
外源添加巨桉两种挥发性化合物对受体植物萌发、生长及四种生理指标的影响
Effects of two exogenously added volatile compounds from Eucalyptus grandis plantations on seed germination, seedling growth and four physiological indexes of target plants
摘要
Abstract
On the basis of identification of volatile compounds across a range of E.grandis plantation ages and through preliminary experiments, two volatile compounds (Decane and 2, 2, 4, 6, 6-Pentamethyl-heptane) were selected to evaluate their effects on the seed germination, seedling growth and four physiological indexes of three target plants (Raphanus sativus, Vigna radiate, Lactuca sativa).The results showed that the two volatile compounds exerted inhibitory effects on the seed germination of three target plants, and the inhibitory effects were strengthened with the increasing concentrations.The roots length was stimulated at lower dose but was inhibited at higher concentrations, and the effects were strengthened with the increasing concentrations.The shoot height of three target plants under the treatment of decane was stimulated at lower concentrations, and was inhibited at higher dose.Under 2, 2, 4, 6, 6-pentamethyl-heptane treatment, the shoot height of Raphanus sativus and Lactuca sativa was stimulated at lower concentrations and was inhibited at the higher concentrations, but that of Vigna radiate was inhibited significantly at the higher concentrations.There were no obvious effects of 2, 2, 4, 6, 6-pentamethyl-heptane on the seedling/root fresh weight ratio of Raphanus sativus and Vigna radiate at lower concentration but represented significantly stimulative effects at higher concentrations, but the effect on seedling/root fresh weight ratio of Lactuca sativa was not obvious with the increasing concentrations.2) The SOD activities of Lactuca sativa under the treatments of decane and2, 2, 4, 6, 6-Pentamethyl-heptane, and those of Raphanus sativus under the treatment of 2, 2, 4, 6, 6-Pentamethyl-heptane were not significantly changed with the increasing concentrations.All the other treatments stimulated or represented no significant effects on the SOD and CAT activities of target plants at lower concentrations, but the two enzyme activities were inhibited at higher concentrations.The two chemicals were apparently reduced or showed no significant effects on the MDA content of target plants at lower concentrations, but stimulated at higher concentrations.The TTC contents of the three plants were promoted or not obviously affected at lower concentrations, but were inhibited at higher concentrations.关键词
巨桉人工林/挥发性有机化合物/种子萌发/幼苗生长/生理指标Key words
Eucalyptus grandis plantations/volatile organic compounds/seed germination/seedling growth/physiological index分类
生物科学引用本文复制引用
李金金,张健,余俊里,汤智群,王春子,张丹桔..外源添加巨桉两种挥发性化合物对受体植物萌发、生长及四种生理指标的影响[J].生态科学,2018,37(6):9-19,11.基金项目
国家自然科学基金项目(31300528) （31300528）
