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引用本文:袁桂香,符辉,钟家有,倪乐意,朱天顺,李威,宋鑫.铵胁迫对狐尾藻(Myriophyllum spicatum)和金鱼藻(Ceratophyllum demersum)生物量分配和形态的影响.湖泊科学,2013,25(5):729-734. DOI:10.18307/2013.0515
YUAN Guixiang,FU Hui,ZHONG Jiayou,NI Leyi,ZHU Tianshun,LI Wei,SONG Xin.Changes in biomass allocation and morphology of Myriophyllum spicatum and Ceratophyllum demersum under the ammonium stress. J. Lake Sci.2013,25(5):729-734. DOI:10.18307/2013.0515
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铵胁迫对狐尾藻(Myriophyllum spicatum)和金鱼藻(Ceratophyllum demersum)生物量分配和形态的影响
袁桂香1,2,3, 符辉1,2, 钟家有2, 倪乐意1, 朱天顺1, 李威1, 宋鑫1
1.中国科学院水生生物研究所, 东湖湖泊生态系统实验站, 淡水生态与生物技术国家重点实验室, 武汉 430072;2.江西省水利科学研究院, 南昌 330029;3.中国科学院大学, 北京 100049
摘要:
选取了两种常见的沉水植物狐尾藻和金鱼藻,通过测定其单株生物量、株高、根生物量/单株生物量、茎生物量/单株生物量和叶生物量/单株生物量,研究这两种沉水植物在2 mg/L的铵态氮持续处理4 d以及铵态氮胁迫解除后的生长情况.结果表明:铵胁迫阶段,与对照组相比,处理对狐尾藻各测定参数均无显著影响,而使金鱼藻株高显著增加.在铵胁迫解除阶段,与对照组相比,处理组狐尾藻单株生物量增加不显著,而金鱼藻单株生物量显著增加;处理组2种沉水植物株高均显著增加;处理组狐尾藻叶生物量/单株生物量显著增加,而根生物量/单株生物量显著减少,茎生物量/单株生物量保持不变.认为高光照环境下(约400μmol/(m2·s)),水体中铵态氮浓度短时间内(4 d)适当增加对沉水植物生长没有抑制作用;金鱼藻对高铵态氮浓度水体的适应能力较狐尾藻强.
关键词:  铵胁迫  沉水植物  生物量分配  形态  狐尾藻  金鱼藻
DOI:10.18307/2013.0515
分类号:
基金项目:国家水体污染控制与治理科技重大专项项目(2012ZX07105-004)资助
Changes in biomass allocation and morphology of Myriophyllum spicatum and Ceratophyllum demersum under the ammonium stress
YUAN Guixiang1,2,3, FU Hui1,2, ZHONG Jiayou2, NI Leyi1, ZHU Tianshun1, LI Wei1, SONG Xin1
1.Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China;2.Jiangxi Institute of Water Sciences, Nanchang 330029, P. R. China;3.University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Abstract:
Two submerged macrohphytes,Myriophyllum spicatum and Ceratophyllum demersum,were selected to investigate their changes in growth,biomass allocation and morphology under ammonium stress of 2 mg/L NH4+-N lasting for 4 days and after removing ammonium stress in water column.Individual biomass,shoot height and biomass allocation of three organs (i.e.,root,stem and leaf) were determined.The results showed that during ammonium stress,shoot height of C.demersum increased compared to the control,while all above parameters of M.spicatum did not change much.When ammonium stress was removed,individual biomass of C.demersum increased significantly in comparison to that of the control,while that of M.spicatum kept unchanged.Both species showed significant higher shoot heights in treatment than in the control.Leaf biomass per unit plant weight of M.spicatum increased,while root biomass per unit plant weight decreased relative to the control after removing ammonium stress.This result suggested that ammonium stress in a short term (4 days) would not inhibit the growth of submerged macrophytes in later period in high irradiance (about 400 μmol/(m2·s)),and M.spicatum was more sensitive to ammonium stress than C.demersum.
Key words:  Ammonium stress  submerged macrophytes  biomass allocation  morphology  Myriophyllum spicatum  Ceratophyllum demersum
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