Dissertation > Excellent graduate degree dissertation topics show

Study on Tolerance of Five Species of Garden Flower to Copper Stress

Author: FuYongYu
Tutor: SunMing
School: Beijing Forestry University
Course: Ornamental Plants and Horticulture
Keywords: Cu contamination garden flower biomass accumulation tolerance
CLC: S68
Type: Master's thesis
Year: 2012
Downloads: 13
Quote: 0
Read: Download Dissertation


The thesis was based on the characteristics of uptake, accumulation, transformation, rehabilitation of copper contaminated on five garden flower species including Orychophragmus violaceus (L.) O.E.Schulz, Euphorbia splendens Des Moulins, Tagetes erecta.Linn., Begonia semperflorens Link et Otto and Helianthus tuberosus.Linn., as well as influence of Cu stress on growth, physiological and biochemical activities. One sensitive plant and two indicator species for Cu contamination were screened. The research results provided reference and basis for vegetation restoration and construction in Cu contamination area. The major research results were as follows:(1) The growth of all threated plants were influenced with the different Cu treat level. In a case of low Cu concentration, five garden flower species were in healthy growth status; as the enriched Cu concentration in the solution, some of the threated plants grew weak, or dead.(2) Under high Cu concentration treatment, comparing with control plants, the biomass of Helianthus tuberosus.Linn., Orychophragmus violaceus (L.) O.E.Schulz, Begonia semperflorens Link et Otto and Tagetes erecta.Linn. had dropped off 38.76%,30.47%,12.17% and 12.10% separately; but the biomass of Euphorbia splendens Des Moulins had climbed up 28.41%. According the variation with the biomass of five species, the growth of Helianthus tuberosus.Linn. and Orychophragmus violaceus (L.) O.E.Schulz were seriously inhibited, Begonia semperflorens Link et Otto and Tagetes erecta.Linn. were at the middle, Euphorbia splendens Des Moulins was better than control plants.(3) The main parts where five plants accumulated Cu were different. The other four flowers accumulated Cu into their roots, while Orychophragmus violaceus (L.) O.E.Schulz into its aerial part. In five species, the overground part of Begonia semperflorens Link et Otto had the largest Cu content of 623.62mg·kg-1; and the underground part of Tagetes erecta.Linn. had the largest Cu content of 454.43mg-kg-1.(4) In high concentration treatment of Cu, the Cu accumulation of different species followed these sequences:Orychophragmus violaceus (L.) O.E.Schulz (1.58mg)> Helianthus tuberosus.Linn. (0.74mg)> Tagetes erecta.Linn. (0.37mg)> Euphorbia splendens Des Moulins (0.19mg)> Begonia semperflorens Link et Otto (0.15mg)(5) The ability of migration and transformation of different species followed these sequences: Orychophragmus violaceus (L.) O.E.Schulz> Euphorbia splendens Des Moulins> Begonia semperflorens Link et Otto> Helianthus tuberosus.Linn.> Tagetes erecta.Linn.(6) With the increasing Cu concentration, the content of chlorophyll of five garden flower species reduced, but chlorophyll a/b increased.The POD activity of five garden flower species increased with the increasing Cu concentration; and the activities of SOD and CAT increased first but then decreased. Therefore, according to the analysis about the physiological activities of five species, the research drew a conclusion that the growth of Orychophragmus violaceus (L.) O.E.Schulz and Helianthus tuberosus.Linn. were seriously inhibited, Euphorbia splendens Des Moulins was less affected, and Tagetes erecta.Linn. and Begonia semperflorens Link et Otto were at the middle.The results indicated Tagetes erecta.Linn. and Begonia semperflorens Link et Otto had a wider tolerance to Cu contamination, and they could be used as heavy-metal-tolerant plant. At the same time, Orychophragmus violaceus (L.) O.E.Schulz could be selected as Cu contamination indicator plant.Since the special ability of self-adjustment, Euphorbia splendens Des Moulins had application in phytostabilization.

Related Dissertations

  1. Polarized-Light/Geomagnetism/GPS/SINS Integrated Navigation Algorithm,V249.328
  2. Numerical Simulation of Biomass Direct Reburning,TK16
  3. Experimentation Research for Deoxidize Reaction Process of NO_X Adopt Different Reburnning Fuels,TK227.1
  4. Study of Updraft Biomass Air Gasification and Tar-Reducing Technology,TK6
  5. A Study of the Correlation between English Majors’ Tolerance of Ambiguity and Reading Comprehension Achievement,H319
  6. The Research of Fault-Tolerant Techniques for Parallel/Distributed Network Simulator PDNS,TP302.8
  7. Research on Checkpointing in Mobile Computing Environment and Modeling with Petri Nets,TP301.1
  8. Effects of Low Temperature Stress on Blood Physiological and Biochemical Indexes of Oreochromis Hornorum,S917.4
  9. Design and Study on Absorption Plant of Sulfur Dioxide from Flue Gases,X701.3
  10. Preparation of the Crop Stalk-Based Shaped Activated Carbons and Fibreboard,X712
  11. Identification of Water-Logging Tolerance at Seedling Stage and the Difference of Photosynthetic Parameters between Tolerance and Susceptible Types in Brassica Napus L.,S565.4
  12. MATLAB for post-processing in the radar signal processor system simulation applications,TN957.51
  13. Study on Biomass Energy Production Utilization Model Based on Circular Economy,S216
  14. Influence of Biochar Amendments on Decomposition of Soil Organic Carbon and Morphology of Heavy Metal in Red Paddy Soil,S153.6
  15. The Effect of Fertilizer Application on Yield and Quality in Chrysanthemum Morifolium,S567.239
  16. Nitrogen Regulation and Management on High-yield Wheat-maize Rotation System,S512.1
  17. The Effects of Overexpression of OsSsr1 on Stress Tolerance in Tobacco,S572
  18. Study on Processing of Germinated Soybean Accumulating Peptides and Its Soybean Milk,TS214.2
  19. Study of "Solid -air - Liquid" Cogeneration and Product Application in Biomass Energy Conversion Process,S216
  20. Characteristic of Soil Nutrients of Rhizophere Soil in Different Karst Ecosystems with the Change of Degradation Degree,S158

CLC: > Agricultural Sciences > Gardening > Ornamental Horticulture ( flowers and ornamental trees)
© 2012 www.DissertationTopic.Net  Mobile