伊乐藻、苦草和菹草对硝氮与磷复合胁迫的响应  

Responses of Elodea nuttallii,Vallisneria natans and Potamogeton crispu to Acute stress of PO_4^(3-)-P+NO_3^--N

作　　者：马帅[1] 张亚捷[1] 马慧颖[1] 蒋昕彧[1] 朱钰[1] 王湾湾[1] 李效宇[1] 马剑敏[1] 

机构地区：[1]河南师范大学生命科学学院,河南新乡453007

出　　处：《河南师范大学学报（自然科学版）》2010年第6期142-144,共3页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家水体污染控制与治理科技重大专项项目(2009ZX07106-002-004);河南师范大学国家级大学生创新性实验项目(091047611)

摘　　要：利用微宇宙系统研究了在硝氮+磷急性胁迫下,3 d内伊乐藻、苦草和菹草的现存量、生产力、叶绿素含量的变化特点.结果表明:在硝氮+磷28.2 mg.L-1时,伊乐藻和苦草的现存量可保持正增长,高于该浓度,则负增长;菹草在最大的胁迫浓度下(硝氮+磷=225.6 mg.L-1),其现存量仍可保持正增长,3种植物对硝氮与磷复合胁迫的抗性大小次序是:菹草>伊乐藻苦草,硝氮和磷对3种植物的胁迫没有协同效应.The changes of the standing crops, productivities, chlorophyll content of Elodea nuttallii, Vallisneria natans and Potamogeton crispu under the acute stress of [NO3^- -N＋ PO4^3- P] are studied by using microcosm systems within 3 days. The results show that when the concentration of [NO3^- -N] ＋[PO4^3- -P] is among 0-28.2 mg·L^-1, standing crops of the E. nuttallii and V. natans increase markedly, and then decrease when the concentration of [NO^3- -N]＋[PO4^3- -P] exceed 28.2 mg·L^-1. While the standing crops of P. crispu always increase when the concentration of [NO^3- -N]＋[PO4^3- -P] is among 0 225.6 mg·L^-1. The ability is to fight back the stress of NO^3- -N＋PO4^3- -P was P. crispu 〉 E. nuttallii V. natans. There is no synergistic effect hetween NO; -- N and PO4^3- P on the three species plants.

关 键 词：伊乐藻 苦草 菹草 磷 硝氮 复合胁迫 

分 类 号：X503.23[环境科学与工程—环境工程] Q948.116[生物学—植物学]