Dissertation > Excellent graduate degree dissertation topics show

Modification of Physiological Response to Salt Stress by Exogenous Soluble Sugars on Catharanthus Roseus

Author: WangXiaoPeng
Tutor: TangZhongHua；ZuYuanGang
School: Northeast Forestry University
Course: Botany
Keywords: Catharanthus roseus salt stress exogenous sucrose trehalose
CLC: S682.19
Type: Master's thesis
Year: 2009
Downloads: 140
Quote: 3
Read: Download Dissertation

Abstract


In this study,we used Catharanthus roseus as the research object in order to reveal the biological function of sucrose and trehalose with different concentration in plants and environmental interaction.Comparative study focused on depicting the phenotypic change, photosynthetic,osmotic adjustment,carbon and nitrogen metabolism in normal,salt stress and exogenous soluble sugar conditions.Catharanthus roseus seedlings have a serious stress with 250mM NaCl treatment.The direct consequence is the inhibition on plant growth,the reduction of RWC,the decrease of photosynthesis and the reduction of photosynthate.Different concentration of trehalose treatment have different shapes.ST+10mM Tre treatment increase seedlings-salt stress main stem height,root length,leaf area,LMR,LMA, biomass of shoot and root significantly.Besides light concentration trehalose treatment raise photosynthesis,chlorophyll a,b content and RWC etc.Soluble sugar(sucrose,trehalose) content free amino acids(Pro,Glu,Asp) content in seedlings also significantly increased. Judgment by morphology and photosynthesis,ST+30mM Tre treatment has a little effect to relieve salt stress,but not significant to 10mM.ST+50mM Tre treatment has no effect to salt stress.High density of trehalose has poisoning effect to Catharanthus roseus seedlings.Exogenous sucrose can relieve poisoning effect from salt stress to Catharanthus roseus seedlings in some degree.Different concentration of sucrose treatment have no different shapes. ST+100mM Suc and ST+150mM Suc treatment have same effect in the early stage. Seedlings with the treatment of ST+100mM Suc grow well in the later stage.Compared with low density of exogenous sucrose,high density can relieve decreased of biomass, photosynthesis,RWC by salt stress;increase osmotic adjustment ability.Middle,high concentration of sucrose lead to non-structural carbohydrate feedback inhibition and complex environmental effect,it may slow the growth and decrease photosynthesis of seedlings.To compare with the osmotic adjust action of Catharanthus roseus seedlings by exogenous trehalose and sucrose,ST+10mM Tre treatment has the similar results to ST+ 150mM Suc treatment,it can be explained little trehalose has same effect as multiple sucrose. It should be noted that different type and different density has different effert to help the higher plants resist salt stress.

Related Dissertations

  1. Expression of hBMP4 and hBMP7 in Chinese Hamster Ovary Cells,Q78
  2. Effects of CRZ-1 on Growth of Wheat under Salt Stress, Chlorophyllase and Yield,S512.1
  3. Preliminary Study on Salt-Tolerant Mechanism of the New Pennisetum Purpereum Schumach Variety-Sumu No.2,S543.9
  4. Improvement in Electroporation Transformation Efficiency of Gene for Bacillus Subtilis with Trehalose,Q78
  5. Ropgef Family Gene in Response to Abiotic Stresses and Expression at Different Tissues of Arabidopsis,Q945.78
  6. Functional Characterization of Wheat Na~+ /H~+ Antiporter TaNHX2 and Study of TaNHX2 C- Terminus Domain,S512.1
  7. The Research on Mechanisms of Acid Rain Stress of Rapeseed and Mitigative Effects of Exogenous Ascorbate Acid on Acid Rain Damage,S565.4
  8. Photosynthetic Characteristics of pepc Transgenic Rice under Salt Stress,S511
  9. Monitoring of Degaradation of CP4-EPSPS Protein, Endogenous and Exogenous Gene in Roundup Ready Soybean during Food Processing,S565.1
  10. Alleviating Effects of Bacillus Subtilis on the Cucumber under Salt Stress in Substrate Culture,S642.2
  11. Effects of Different Rootstock Grafting on Yield, Quality and Seedling Calcium Chloride Tolerance in Tomatoes,S641.2
  12. Effects of Exogenous Spermidine on CO2 Assimilation and Metabolism of Salt-Stressed Cucumber Seedlings,S642.2
  13. The Physiological Mechanism of Improvement in Watermelon Salt Tolerance by Calcium and Its Effects on Fruit Quality,S651
  14. QTL Analysis of Salt Tolerance from Solanum Cheesmanii during Seed Germination and Seedling Stages Using Advanced Backcross Population,S641.2
  15. Sucrose Metabolic Mechanism of Lilium Asiatic Bulb during Bulb Development and Cooling Storage,S682.29
  16. Turn radish peroxidase gene expression in yeast RsPrx1 Optimization and Its Resistance Mechanism,Q943.2
  17. Effects of SA and S3307 on Physiological and Biochemical Characteristics of Lycium Ruthenicum Murri. Calli under Salt Stress,S567.19
  18. Effects of Temperature, Salt Stress, Alkaline Stress and Their Interactions on Seed Germination of Leymus Chinensis in the Songnen Grassland,S543.9
  19. The Protective Effect and Mechanism of Trehalose in Sternum Cryopreservation,R318.52
  20. Development Status and Design of Sucrose Factorys,TS248
  21. The context of the financial crisis financing difficulties of SMEs in China and Countermeasures,F276.3

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