IHB OpenIR  > 淡水生态学研究中心  > 期刊论文
EFFECTS OF SEDIMENT TYPE ON STEM MECHANICAL PROPERTIES OF THE SUBMERGED MACROPHYTE HYDRILLA VERTICILLATA (L.F.) ROYLE
Zhu, Guorong1; Zhang, Meng1,2; Cao, Te1; Ni, Leyi1; Zhong, Aiwen1; Fu, Hui1; Ni, LY (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China.
2012
Source PublicationFRESENIUS ENVIRONMENTAL BULLETIN
ISSN1018-4619
Volume21Issue:2APages:468-474
AbstractThe decline of submerged macrophytes during the eutrophication progress can be partly attributed to the adverse effects of fertile sediment on morphology and physiology of plants. However, little is known about its effects on mechanical properties, although this has been confirmed in terrestrial plants. In this study, the morphological traits, mechanical properties (tensile force, tensile stress and bending index) and cellulose content of Hydrilla verticillata grown on three types of sediment (sand, clay and loam) with different nutrient levels, were examined experimentally. Results showed that considerable variations in mechanical properties of plants were observed among the three sediments and along the stem, with the highest values in clay sediment and a decreased trend from the lower to upper segment, especially when grown in loam sediment, indicating that mesotrophic sediment benefits to higher mechanical resistance of stems than the other two sediments, and plants were prone to break at the other two segments, rather than the lower segment. Stem cross sectional area and internode length were significantly correlated with tensile force, and tensile stress was a linear function of stem cellulose content. Plants grown in clay sediment showed the shortest plant height and the maximum branch numbers, which are morphologically advantageous to reduce the hydraulic force. In conclusion, fertile sediment stimulated the plant growth at the expense of H. verticillata performance with respect to mechanical resistance. Decrease of mechanical resistance could contribute to the decline of submerged macrophytes with the enrichment of sediment nutrient during the process of eutrophication.; The decline of submerged macrophytes during the eutrophication progress can be partly attributed to the adverse effects of fertile sediment on morphology and physiology of plants. However, little is known about its effects on mechanical properties, although this has been confirmed in terrestrial plants. In this study, the morphological traits, mechanical properties (tensile force, tensile stress and bending index) and cellulose content of Hydrilla verticillata grown on three types of sediment (sand, clay and loam) with different nutrient levels, were examined experimentally. Results showed that considerable variations in mechanical properties of plants were observed among the three sediments and along the stem, with the highest values in clay sediment and a decreased trend from the lower to upper segment, especially when grown in loam sediment, indicating that mesotrophic sediment benefits to higher mechanical resistance of stems than the other two sediments, and plants were prone to break at the other two segments, rather than the lower segment. Stem cross sectional area and internode length were significantly correlated with tensile force, and tensile stress was a linear function of stem cellulose content. Plants grown in clay sediment showed the shortest plant height and the maximum branch numbers, which are morphologically advantageous to reduce the hydraulic force. In conclusion, fertile sediment stimulated the plant growth at the expense of H. verticillata performance with respect to mechanical resistance. Decrease of mechanical resistance could contribute to the decline of submerged macrophytes with the enrichment of sediment nutrient during the process of eutrophication.
SubtypeArticle
KeywordHydrilla Varticillata Sediment Type Mechanical Properties Segments Cellulose Content Cross Sectional Area
Department[Zhu, Guorong; Zhang, Meng; Cao, Te; Ni, Leyi; Zhong, Aiwen; Fu, Hui] Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Zhang, Meng] Jiangxi Acad Environm Sci, Nanchang 330029, Peoples R China
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationNational High Technology Research and Development Programs of China[2012ZX07105004, 2008ZX07106-2] ; National High Technology Research and Development Programs of China[2012ZX07105004, 2008ZX07106-2] ; National High Technology Research and Development Programs of China[2012ZX07105004, 2008ZX07106-2] ; National High Technology Research and Development Programs of China[2012ZX07105004, 2008ZX07106-2]
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000302925300010
WOS KeywordTRITICUM-AESTIVUM L. ; SHALLOW LAKES ; LODGING RESISTANCE ; HYDRAULIC FORCES ; GROWTH ; PLANTS ; WATER ; COMMUNITIES ; ADAPTATIONS ; COMPETITION
Funding OrganizationNational High Technology Research and Development Programs of China[2012ZX07105004, 2008ZX07106-2] ; National High Technology Research and Development Programs of China[2012ZX07105004, 2008ZX07106-2] ; National High Technology Research and Development Programs of China[2012ZX07105004, 2008ZX07106-2] ; National High Technology Research and Development Programs of China[2012ZX07105004, 2008ZX07106-2]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/16873
Collection淡水生态学研究中心_期刊论文
Corresponding AuthorNi, LY (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China.
Affiliation1.Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Jiangxi Acad Environm Sci, Nanchang 330029, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Guorong,Zhang, Meng,Cao, Te,et al. EFFECTS OF SEDIMENT TYPE ON STEM MECHANICAL PROPERTIES OF THE SUBMERGED MACROPHYTE HYDRILLA VERTICILLATA (L.F.) ROYLE[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2012,21(2A):468-474.
APA Zhu, Guorong.,Zhang, Meng.,Cao, Te.,Ni, Leyi.,Zhong, Aiwen.,...&Ni, LY .(2012).EFFECTS OF SEDIMENT TYPE ON STEM MECHANICAL PROPERTIES OF THE SUBMERGED MACROPHYTE HYDRILLA VERTICILLATA (L.F.) ROYLE.FRESENIUS ENVIRONMENTAL BULLETIN,21(2A),468-474.
MLA Zhu, Guorong,et al."EFFECTS OF SEDIMENT TYPE ON STEM MECHANICAL PROPERTIES OF THE SUBMERGED MACROPHYTE HYDRILLA VERTICILLATA (L.F.) ROYLE".FRESENIUS ENVIRONMENTAL BULLETIN 21.2A(2012):468-474.
Files in This Item:
File Name/Size DocType Version Access License
EFFECTS OF SEDIMENT (588KB) 开放获取--View Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhu, Guorong]'s Articles
[Zhang, Meng]'s Articles
[Cao, Te]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhu, Guorong]'s Articles
[Zhang, Meng]'s Articles
[Cao, Te]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhu, Guorong]'s Articles
[Zhang, Meng]'s Articles
[Cao, Te]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: EFFECTS OF SEDIMENT TYPE ON STEM MECHANICAL PROPERTIES OF THE SUBMERGED MACROPHYTE HYDRILLA VERTICILLATA (L.F.) ROYLE.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.