Water-lead interactive stress effect on growth and physiological characteristics of Jatropha curcas L.
WANG Weihua1, LEI Longhai1,2, YANG Qiliang1, WU Zhenzhong1
1.Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 2.The Office of Water and Soil Conservation of Bijie City, Bijie, Guiyang 551700, China
Abstract：In order to improve the tolerance of Jatropha curcas L. to Pb and its effect on the remediation of contaminated soil and recommend the best water lead combination that does not affect the normal growth, the water lead interaction stress on the influence of growth and physiological characteristics of Jatropha curcas L. was studied.The experiment designed 4 irrigation levels(T1:100%FC, T2:80%FC, T3:60%FC, T4:40%FC),4 soil Pb pollution levels(A:0mg/kg, B:500 mg/kg, C:1 000 mg/kg, D:1 500 mg/kg).The results show that lead water interaction under T2 water stress significantly increased the biomass and repair effect of Jatropha curcas L. Under water lead interaction, the activities of SOD and POD of Jatropha curcas L. were increased first and then decreased. Compared with single water stress and lead stress, SOD and POD activities were increased under the interaction stress.Under the water-lead interaction stress, the cell membrane permeability of Jatropha curcas L. increased, while C and D under the treatment of T2 based on T1 reduced the permeability of cell membrane.Jatropha curcas L. leaf water potential decreased gradually with the increase of water stress when the soil Pb concentration was less than 500 mg/kg, Jatropha curcas L. leaf water potential increased gradually with the increase of water stress, when the soil Pb concentration was more than or equal to 1 000 mg/kg.The appropriate interaction stress can improve the Pb-tolerant stress ability and repair efficiency of Jatropha curcas L.. It provides a theoretical basis for further promoting the practice and promotion in the field of lead contaminated soil of Jatropha curcas L..
王卫华, 雷龙海,, 杨启良, 武振中. 水铅交互胁迫对小桐子生长及生理特性的影响[J]. 排灌机械工程学报, 2017, 35(6): 520-525.
WANG Weihua, LEI Longhai,, YANG Qiliang, WU Zhenzhong. Water-lead interactive stress effect on growth and physiological characteristics of Jatropha curcas L.. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(6): 520-525.
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