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Effects of sediment anoxia and light on turion germination and early growth of Potamogeton crispus
Wu, Juan; Cheng, Shuiping; Liang, Wei; He, Feng; Wu, Zhenbin; Wu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2009-07-01
Source PublicationHYDROBIOLOGIA
ISSN0018-8158
Volume628Issue:1Pages:111-119
AbstractPotamogeton crispus is a cosmopolitan aquatic species and is widely used as a pioneer species for vegetation restoration of eutrophic lakes. However, many restoration projects applying P. crispus turions have not been successful. Earlier studies focused on effects of light and temperature on turion germination. The purpose of this study was to determine whether sediment anoxia and light interactively affected the turion germination and early growth of P. crispus. Anoxic conditions in the experiment were produced by adding sucrose to the sediment. The germination rate of the turions was 68-73% lower in the highly anoxic condition treatment than in the control. Medium light intensity (10% of natural light at the water surface) was more favorable for germination under slightly anoxic conditions than either low or high light intensity. The growth of newly-formed sprouts was also significantly inhibited by sediment anoxia. Photosynthesis and shoot biomass were reduced under sediment anoxia, whereas total chlorophyll content, root biomass, and soluble protein content were highest in the low anoxic condition treatment. Medium light improved net photosynthesis and biomass production of the sprouts. We conclude that turion germination and sprout growth can be significantly inhibited by sediment anoxia. Medium light intensity may alleviate this inhibition by anoxia, but light has little effect when sediment anoxia is severe. For the purposes of vegetation restoration, more attention should be paid to the role of sediment anoxia, and it is necessary to improve sediment and light conditions for turion germination and early growth of P. crispus in eutrophic lakes. These results will contribute to a more complete understanding of turion germination dynamics of P. crispus and will be useful for future restoration programs.; Potamogeton crispus is a cosmopolitan aquatic species and is widely used as a pioneer species for vegetation restoration of eutrophic lakes. However, many restoration projects applying P. crispus turions have not been successful. Earlier studies focused on effects of light and temperature on turion germination. The purpose of this study was to determine whether sediment anoxia and light interactively affected the turion germination and early growth of P. crispus. Anoxic conditions in the experiment were produced by adding sucrose to the sediment. The germination rate of the turions was 68-73% lower in the highly anoxic condition treatment than in the control. Medium light intensity (10% of natural light at the water surface) was more favorable for germination under slightly anoxic conditions than either low or high light intensity. The growth of newly-formed sprouts was also significantly inhibited by sediment anoxia. Photosynthesis and shoot biomass were reduced under sediment anoxia, whereas total chlorophyll content, root biomass, and soluble protein content were highest in the low anoxic condition treatment. Medium light improved net photosynthesis and biomass production of the sprouts. We conclude that turion germination and sprout growth can be significantly inhibited by sediment anoxia. Medium light intensity may alleviate this inhibition by anoxia, but light has little effect when sediment anoxia is severe. For the purposes of vegetation restoration, more attention should be paid to the role of sediment anoxia, and it is necessary to improve sediment and light conditions for turion germination and early growth of P. crispus in eutrophic lakes. These results will contribute to a more complete understanding of turion germination dynamics of P. crispus and will be useful for future restoration programs.
SubtypeArticle
KeywordSediment Anoxia Light Turion Germination Growth Potamogeton Crispus
Department[Wu, Juan; Cheng, Shuiping; Liang, Wei; He, Feng; Wu, Zhenbin] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Subject AreaMarine & Freshwater Biology
DOI10.1007/s10750-009-9749-1
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationChinese Academy of Sciences [KZCX2-YW-426]; Project of National Major Program of Science and Technology [2008ZX07316-004] ; Chinese Academy of Sciences [KZCX2-YW-426]; Project of National Major Program of Science and Technology [2008ZX07316-004] ; Chinese Academy of Sciences [KZCX2-YW-426]; Project of National Major Program of Science and Technology [2008ZX07316-004] ; Chinese Academy of Sciences [KZCX2-YW-426]; Project of National Major Program of Science and Technology [2008ZX07316-004]
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology
WOS SubjectMarine & Freshwater Biology
WOS IDWOS:000266007900008
WOS KeywordZOSTERA-MARINA ; SULFIDE ; MACROPHYTES ; SEAGRASS ; EELGRASS ; OXYGEN ; LAKE ; PHOTOSYNTHESIS ; IRRADIANCE ; EVENTS
Funding OrganizationChinese Academy of Sciences [KZCX2-YW-426]; Project of National Major Program of Science and Technology [2008ZX07316-004] ; Chinese Academy of Sciences [KZCX2-YW-426]; Project of National Major Program of Science and Technology [2008ZX07316-004] ; Chinese Academy of Sciences [KZCX2-YW-426]; Project of National Major Program of Science and Technology [2008ZX07316-004] ; Chinese Academy of Sciences [KZCX2-YW-426]; Project of National Major Program of Science and Technology [2008ZX07316-004]
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Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/7754
Collection期刊论文
Corresponding AuthorWu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
AffiliationChinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Wu, Juan,Cheng, Shuiping,Liang, Wei,et al. Effects of sediment anoxia and light on turion germination and early growth of Potamogeton crispus[J]. HYDROBIOLOGIA,2009,628(1):111-119.
APA Wu, Juan,Cheng, Shuiping,Liang, Wei,He, Feng,Wu, Zhenbin,&Wu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.(2009).Effects of sediment anoxia and light on turion germination and early growth of Potamogeton crispus.HYDROBIOLOGIA,628(1),111-119.
MLA Wu, Juan,et al."Effects of sediment anoxia and light on turion germination and early growth of Potamogeton crispus".HYDROBIOLOGIA 628.1(2009):111-119.
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