title: Hormetic Responses of Lonicera Japonica Thunb. To Cadmium Stress.
abstract: The hormetic responses of Lonicera japonica Thunb. to cadmium (Cd) stress were investigated in a hydroponic experiment. The present results showed that root length and total biomass dry weight increased in comparison with the control at low concentrations Cd. The height of the plant exposed to 2.5 and 5 mg L(-1) Cd increased significantly by 11.9% and 12.8% relative to the control, and with the increase of Cd concentrations in the medium, plant height began to decrease. The responses of photosynthetic pigments contents and relative water content to Cd stress had a similar trend, which all showed significantly an inverted U-shaped dose-response curve and confirmed that the stimulatory effect of low concentrations Cd occurred in the plant. Furthermore, L. japonica, as a new Cd-hyperaccumulator, could be considered as a new plant model to study the underlying mechanisms of the hormesis.
authors.affiliation: State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, PR China.
authors.forename: Zhouli
authors.initials: Z
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, PR China.
authors.forename: Xingyuan
authors.initials: X
authors.lastname: He
authors.affiliation: Graduate University of Chinese Academy of Sciences, Jia 19 Yuquan Road, Beijing 100039, People's Republic of China.
authors.forename: Lian
authors.initials: L
authors.lastname: Jia
authors.affiliation: Graduate University of Chinese Academy of Sciences, Jia 19 Yuquan Road, Beijing 100039, People's Republic of China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Yu
authors.affiliation: Graduate University of Chinese Academy of Sciences, Jia 19 Yuquan Road, Beijing 100039, People's Republic of China.
authors.forename: Mingzhu
authors.initials: M
authors.lastname: Zhao
keywords: Hormetic responses; Lonicera japonica Thunb.; cadmium; hyperaccumulator