附着物对冬季菹草叶绿素荧光活性的影响
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摘要
为探究附着物去除对低温环境下菹草Potamogeton crispus的胁迫作用及其变化,选择全球分布最广且冬季生长的菹草为研究对象,于2016年1月14—19日通过原位测量的方法,对比某静水池塘沉水植物茎叶表面附着物去除前后菹草叶片叶绿素荧光参数的变化情况。结果表明,与未去除附着物的对照组菹草叶片相比,去除附着物的处理组菹草叶片的最大光量子产量(Fv/Fm)仅在第一天随光合辐射强度的增加呈下降趋势,但相对电子传递速率(rETR)值仅在第一天随光合辐射强度的增加呈下降趋势,从试验第2天开始就逐渐恢复到与对照组相近水平(P>0.05)。研究表明,菹草本身对于附着物去除的适应能力可能非常迅速,而在低温环境下,附着物的遮光作用对低温条件下菹草易发的光抑制现象是一种保护。
Changes in chlorophyll fluorescence parameters were in situ measured on surface of leaf and stem in crisp pondweed Potamogeton crispus, as wide distribution and growing in winter submerged macrophyte, exposed to epiphyton and removal of the epiphyton on January 14-19, 2016 to evaluate the impact of epiphyton on photosynthesis of crisp pondweed under low temperature environment. It was found that the maximum photon quantum yield(Fv/Fm) was significantly decreased on the treated leaves after the removal of attachments compared with the untreated leaves(P<0.05). However, the relative electron transfer rate(rETR) was decreased only on the first day with the increase in photosynthetic radiation, and decrease in the value of rETR was observed only on the first day, and gradually recovered from the second day of the experiment to same level in the control group(P>0.05). The findings indicate that crisp pondweed has very rapid adaptability of epiphyton removal, especially the shading effect of periphyton being a kind of protection to the photoinhibition of crisp pondweed in low temperature environment.
Changes in chlorophyll fluorescence parameters were in situ measured on surface of leaf and stem in crisp pondweed Potamogeton crispus, as wide distribution and growing in winter submerged macrophyte, exposed to epiphyton and removal of the epiphyton on January 14-19, 2016 to evaluate the impact of epiphyton on photosynthesis of crisp pondweed under low temperature environment. It was found that the maximum photon quantum yield(Fv/Fm) was significantly decreased on the treated leaves after the removal of attachments compared with the untreated leaves(P<0.05). However, the relative electron transfer rate(rETR) was decreased only on the first day with the increase in photosynthetic radiation, and decrease in the value of rETR was observed only on the first day, and gradually recovered from the second day of the experiment to same level in the control group(P>0.05). The findings indicate that crisp pondweed has very rapid adaptability of epiphyton removal, especially the shading effect of periphyton being a kind of protection to the photoinhibition of crisp pondweed in low temperature environment.
引文
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[25] Van T K,Haller W T,Bowes G.Comparison of the photosynthetic characteristics of three submersed aquatic plants[J].Plant Physiology,1976,58(6):761-768.
[26] Lucas W J,Berry J A.Inorganic carbon transport in aquatic photosynthetic organisms[J].Physiologia Plantarum,1985,65(4):539-543.
[27] Duarte C M.Seagrass depth limits[J].Aquatic Botany,1991,40(4):363-377.
[28] 魏宏农,潘建林,赵凯,等.菹草附着物对营养盐浓度的响应及其与菹草衰亡的关系[J].生态学报,2013,33(24):7661-7666.
[2] Batzer D P,Palik B J.Variable response by aquatic invertebrates to experimental manipulations of leaf litter input into seasonal woodland ponds[J].Fundamental and Applied Limnology,2007,168(2):155-162.
[3] Kolada A.The use of aquatic vegetation in lake assessment:testing the sensitivity of macrophyte metrics to anthropogenic pressures and water quality[J].Hydrobiologia,2010,656(1):133-147.
[4] Kreiling R M,Richardson W B,Cavanaugh J C,et al.Summer nitrate uptake and denitrification in an upper Mississippi River backwater lake:the role of rooted aquatic vegetation[J].Biogeochemistry,2011,104(1-3):309-324.
[5] Pip E.The ecology of Potamogeton species in central North America[J].Hydrobiologia,1987,153(3):203-216.
[6] Vis C,Hudon C,Carignan R.Influence of the vertical structure of macrophyte stands on epiphyte community metabolism[J].Canadian Journal of Fisheries and Aquatic Sciences,2006,63(5):1014-1026.
[7] Neely R K,Wetzel R G.Simultaneous use of 14C and 3H to determine autotrophic production and bacterial protein production in periphyton[J].Microbial Ecology,1995,30(3):227-237.
[8] Sims A,Zhang Yanyan,Gajaraj S,et al.Toward the development of microbial indicators for wetland assessment[J].Water Research,2013,47(5):1711-1725.
[9] Aloi J E.A critical review of recent freshwater periphyton field methods[J].Canadian Journal of Fisheries and Aquatic Sciences,1990,47(3):656-670.
[10] K?hler J,Hacho? J,Hilt S.Regulation of submersed macrophyte biomass in a temperate lowland river:interactions between shading by bank vegetation,epiphyton and water turbidity[J].Aquatic Botany,2010,92(2):129-136.
[11] Phillips G L,Eminson D,Moss B.A mechanism to account for macrophyte decline in progressively eutrophicated freshwaters[J].Aquatic Botany,1978,4:103-126.
[12] Qin Baoqiang,Yang Liuyan,Chen Feizhou,et al.Mechanism and control of lake eutrophication[J].Chinese Science Bulletin,2006,51(19):2401-2412.
[13] 李强,王国祥.冬季降温对菹草叶片光合荧光特性的影响[J].生态环境,2008,17(5):1754-1758.
[14] 李文朝.富营养水体中常绿水生植被组建及净化效果研究[J].中国环境科学,1997,17(1):53-57.
[15] 李英杰,许秋瑾,金相灿,等.湖泊水生植被恢复物种选择及群落配置分析[J].环境污染治理技术与设备,2004,5(8):23-26.
[16] 国家环境保护总局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002:670-671.
[17] 吴晓东,王国祥,李振国,等.干旱胁迫对香蒲生长和叶绿素荧光参数的影响[J].生态与农村环境学报,2012,28(1):103-107.
[18] Küster A,Altenburger R.Development and validation of a new fluorescence-based bioassay for aquatic macrophyte species[J].Chemosphere,2007,67(1):194-201.
[19] 韩博平,韩志国,付翔.藻类光合作用机理与模型[M].北京:科学出版社,2003.
[20] Greer D H,Berry J A,Bj?rkman O.Photoinhibition of photosynthesis in intact bean leaves:role of light and temperature,and requirement for chloroplast-protein synthesis during recovery[J].Planta,1986,168(2):253-260.
[21] Greer D H,Ottander C,?qust G.Photoinhibition and recovery of photosynthesis in intact barley leaves at 5 and 20 ℃[J].Plant Physiology,1991,81(2):203-210.
[22] Küster A,Schaible R,Schubert H.Light acclimation of photosynthesis in three charophyte species[J].Aquatic Botany,2004,79(2):111-124.
[23] Madsen T V.Growth and photosynthetic acclimation by Ranunculus aquatilis L.in response to inorganic carbon availability[J].New Phytologist,1993,125(4):707-715.
[24] Bowes G,Salvucci M E.Plasticity in the photosynthetic carbon metabolism of submersed aquatic macrophytes[J].Aquatic Botany,1989,34(1-3):233-266.
[25] Van T K,Haller W T,Bowes G.Comparison of the photosynthetic characteristics of three submersed aquatic plants[J].Plant Physiology,1976,58(6):761-768.
[26] Lucas W J,Berry J A.Inorganic carbon transport in aquatic photosynthetic organisms[J].Physiologia Plantarum,1985,65(4):539-543.
[27] Duarte C M.Seagrass depth limits[J].Aquatic Botany,1991,40(4):363-377.
[28] 魏宏农,潘建林,赵凯,等.菹草附着物对营养盐浓度的响应及其与菹草衰亡的关系[J].生态学报,2013,33(24):7661-7666.
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