Differential Effects of Ammonium and Nitrate on Growth Performance of Glechoma longituba under Heterogeneous Cd Stress

作     者：Yanwei Feng Wen Lei Rui Gu Ping Zhao Shijun Ni Ningfei Lei 

作者机构：College of Earth SciencesChengdu University of TechnologyChengdu610101China College of Landscape ArchitectureSichuan Agricultural UniversityChengdu610101China College of EnvironmentChengdu University of TechnologyChengdu610101China Geological Party 105Guizhou Provincial Bureau of Geology and Mineral Exploration and DevelopmentGuiyang550018China 

出 版 物：《Phyton-International Journal of Experimental Botany》 (国际实验植物学杂志（英文）)

年 卷 期：2020年第89卷第3期

页      面：667-679页

核心收录：

学科分类：0711[理学-系统科学] 07[理学] 08[工学] 081101[工学-控制理论与控制工程] 0811[工学-控制科学与工程] 071102[理学-系统分析与集成] 081103[工学-系统工程] 

基　　金：This research was supported by Science and Technology Support Program of Sichuan Province(2016NYZ0021) Guizhou Environmental Protection Department(2016) 

主　　题：Clonal plant physiological integration nitrogen form antioxidant capacity chlorophyll fluorescence 

摘      要：Water,minerals,nutrients,etc.,can be shared by physiological integration among inter-connected ramets of clonal *** plays an important role in alleviating cadmium(Cd)stress for clonal *** how different forms of nitrogen affect growth performance of clonal plants subjected to heterogeneous Cd stress still remains poorly understood.A pot experiment was conducted to investigate the differential effects of ammonium and nitrate on growth performance of Glechoma longituba under heterogeneous Cd *** the experiment,parent ramets of Glechoma longituba clonal fragments were respectively supplied with modified Hoagland solution containing 7.5 mM ammonium,7.5 mM nitrate or the same volume of nutrient solution without *** solution with different concentrations(0,0.1 or 2.0 mM)was applied to offspring ramets of the clonal *** with control(N-free),nitrogen addition to parent ramets,especially ammonium,significantly improved antioxidant capacity[glutathione(GSH),proline(Pro),peroxidase(POD,)superoxide dismutase(SOD)and catalase(CAT)],PSII activity[maximum quantum yield of PSII(F_(v)/F_(m))and effective quantum yield of PSII(ΦPSII)],chlorophyll content and biomass accumulation of the offspring ramets suffering from Cd *** addition,negative effects of nitrate on growth performance of whole clonal fragments were observed under Cd stress with high concentration(2.0 mM).Transportation or sharing of nitrogen,especially ammonium,can improve growth performance of clonal plants under heterogeneous Cd *** experiment provides insight into transmission mechanism of nitrogen among ramets of clonal plants suffering from heterogeneous nutrient *** integration might be an important ecological strategy for clonal plants adapting to heterogeneous environment stress conditions.