Effects of Drought Stress on the Physiological and Biochemical Indices of Lonicera tatarica
YAO Zheng-yang et al(Forestry College,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010019)
[Objective] The aim of the research was to discuss the adaptable response of Lonicera tatarica to drought stress so as to supply theoretical foundation for its introduction and cultivation.[Method] With seedlings of potted L.tatarica and Lonicera maackii as materials,their physiological and biochemical changes under drought stress and the relation between these changes and their drought resistance were researched.[Result] The water saturation deficiency(WSD) of leaves had no significant difference between the 2 shrub seedlings in the early stage of drought stress,as the drought stress was aggravated,the WSD of L.maackii leaves was significantly higher than that of L.tatarica.Compared with CK,after drought stress for 20 d,the relative plasmalemma permeabilities and MDA contents of L.maackii and L.tatarica were increased by 85.5%,83.1% and 39.8%,32.0% resp.In the treatment with drought stress,the chlorophyll contents of L.maackii and L.tatarica were continuously decreased from 2.037 and 2.293 mg/g to 1.543 and 2.023 mg/g of the 20th day.As the intensity of drought stress was increased,the activities of SOD and POD were firstly increased and then decreased.[Conclusion] The drought resistance of L.tatarica was stronger than that of L.maackii.
【CateGory Index】： S685.99;S567.19