摘要
[目的]从叶片光合生理角度,探讨水葱和香蒲对水质恶化的响应.[方法]以香蒲和水葱为研究对象,设置试验组(污水生长环境培养)和对照组(中水生长环境培养),处理90 d后,用Li-6400便携式光合测定仪测定植物叶片的光合作用光响应曲线和叶绿素荧光参数.[结果]香蒲叶片最大净光合速率(Pnmax)、光补偿点(LCP)、光饱和点(LSP)、有效荧光产量(Yield)、电子传递速率(ETR)、光化学淬灭系数(qP)和非光化学淬灭系数(NPQ)在2种处理间差异不显著(P>0.05),但试验组叶片的暗呼吸速率(Rd)显著低于对照组(P<0.05),表观量子效率(AQY)显著高于对照组(P<0.05);试验组水葱叶片的Pnmax、AQY、Rd、LSP、Yield、ETR、qP显著高于对照(P<0.05),LCP显著低于对照组(P<0.05),而NPQ差异不显著(P>0.05).[结论]试验用污水超过V类,香蒲和水葱均具有较强的耐污能力,水葱对水质恶化的反映较香蒲敏感.
Abstract
[Objective]From the angle of leaf photosynthetic physiology,discuss the response and adaptation of Typha orientalis and Scirpus tabernaemontani on water quality deterioration.[Method]Taking Typha orientalis and Scirpus tabernaemontani as the research object,set the test group(sewage growth environment training)and control group(water environment training),after 3 months,the photosynthesis,light response curve and chlorophyll fluorescence parameters of plant leaves were measured by Li-6400 portable photosynthetic apparatus.[Result]Typha orientalis leaves' Pnmax,LCP,LSP,Yield,ETR,qP and NPQ were no significant differences under two different treatments(P>0.05),but the Rd of experimental group was significantly smaller than that of control group(P<0.05),AQY was significantly bigger than that of control group(P<0.05).Scirpus tabernaemontani leaves' Pnmax,AQY,Rd,LSP,Yield,ETR,qP were significantly bigger than that of control group(P<0.05),LCP was significantly smaller than that of control group(P<0.05),but NPQ was no significant differences each other(P>0.05).[Conclusion]The sewage that used in experiment exceeded V class,showing that Typha orientalis and Scirpus tabernaemontani all have strong tolerance abilities to sewage,Scirpus tabernaemontani's responses are more sensitive than Typha orientalis to certain range of water quality deterioration.
国家科技期刊平台
NSTL
维普
万方数据