Dissertation > Excellent graduate degree dissertation topics show

Study on Photosynthesis Duration Characteristic of Panax Quinquefolium L.

Author: ZhangMeiShan
Tutor: XuKeZhang
School: Jilin Agricultural University
Course: Crop Cultivation and Farming System
Keywords: Panax quinquefolium L. Photosynthesis duration characteristic
CLC: S567.53
Type: Master's thesis
Year: 2002
Downloads: 106
Quote: 0
Read: Download Dissertation

Abstract


In this paper, Photosynthesis diurnal change and variation during the whole growth stage of three-year-old Vanax quinquefolium L. grown under natural environmental condition in the field and invariable environmental condition in artificial simulated climate chamber were measured aiming to find the duration characteristic and restrictive factors of photosynthesis so as to regulate and control photosynthesis and improve the photosynthesis duration capability. Main results are as follows:1. Diurnal change of photosynthesis of Panax quinquefolium L. grown under natural environment in the field can be described by a regular single submit curve or alteration curve. The net photosynthetic rate (Pn) increased as light intension with the correlation coefficient of 0.7756. Photosynthetic rate in the afternoon(13:00~16:00)is less than that in the morning (8:00~11:00). Diurnal decrease of photosynthetic rate is marked at ratio of 24.5%.2. Photosynthesis diurnal change of Panax quinquefolium L. grown under invariable light, temperature and humidity condition in the artificial simulated climate chamber can be described by a single submit curve. The maximum value of Pn appeared between 9:00-13:00. The ratio of diurnal decrease is 19.5%, and correlation is marked between Pn and stomatal conductance (Sc). Stomata inhibition analysis showed that diurnal change of photosynthesis was caused by non-stomata factors under relatively invariable condition. Panax quinquefolium L. leaves photosynthesis diurnal change rule connected closely with the endogenesis rhythm and the accumulation of photosynthetic production. Relationship between Pn and starch content is negatively correlate, and correlation coefficient is -0.8073. Pn was declined obviously under water stress.3. Pn of Panax quinquefolium L. leaves appears two peeks at unfold leaves stage and green fruit stage during the whole grown stage. Pn and chlorophyll (a+b) is positively relative with correlation coefficient of 0.9578. Pn and soluble protein content is marked positively relative with correlation coefficient of 0.9756.4. Compared with the check, Panax quinquefolium L. leaves spurted with B9 and PP333,chla, chlb, chl(a+b), chla/chlb, Sc and transpiration rate are improved distinctly.The activity of chlorophyll, protein, SOD and CAT of Panax quinquefolium L. leaves dropped more slowly after dealt with 6-BA. Photosynthetic rate are increased and MDAaccumulation was restrained.

Related Dissertations

  1. Effects of Light Control on Tissue Culture and Photosynthesis Characterristics of Anthurium Andraeanum Lind,S682.14
  2. Effects of Pre-Anthesis Drought Hardening on Grain Yield and Quality Formation in Wheat under Post-Anthesis Drought and Its Physiological Mechanism,S512.1
  3. Study on the Regulatory Effects of Nitrogen Application Period on Yield Formation and Quality with Wheat,S512.1
  4. Effects of Pre-Anthesis Waterlogging Hardening on Grain Yield and Quality Formation in Wheat under Post-Anthesis Waterlogging and Its Physiological Mechanism,S512.1
  5. Regulation of 5-Aminolevulinic Acid (ALA) on Leaf Photosynthesis of Pear (Pyrus Pyrifolia Nakai),S661.2
  6. Study on Shade Resistance of Chrysanthemum and Its Related Taxa Seedlings,S682.11
  7. Study on the Formation of Yield and Quality for Different Genotypes of Faba Bean and Regulatory Mechanism,S643.6
  8. Effects of Exogenous Spermidine on CO2 Assimilation and Metabolism of Salt-Stressed Cucumber Seedlings,S642.2
  9. Effect of HCO3-, K+ and HSO3- on rbcL and rbcS Gene Expression and Photosynthesis of Soybean Seedlings,S565.1
  10. Radiation Characteristic and Simulation Model for Tomato Canopy Photosynthesis in Solar-greenhouse Long-season Cultivation,S641.2
  11. Species Biodiversity between Golmud and Ihasa Along Tibet Railway and Photosynthetic Characteristics of Several Native Plants,S718.4
  12. Effects of Drought Stress on Photosynthesis and Fluorescence Chlorophyll Parameters of Apple Leaves and Leaf Senescence Characteristics,S661.1
  13. Rare and NO wheat under drought stress affect antioxidant system,S512.1
  14. Study on Drought Stress to Photosyntheyic,water Consumption Haracteristics and Drought Resistance of Malus Domestica Borkh.CV.Red Fuji,S661.1
  15. Studies on the Difference of Zn Accumulation and Mechanism in Different Varieties of Rape (Brassica),S565.4
  16. Effect of Zinc Levels on Photosynthetic Characteristics, Carbohydrate and Metabolic Enzymes in Apple Tree Leaves,S661.1
  17. The Biotoxicity and Bioaccumulation of Chlorinated Flame Retardants Dechlorane Plus on Marine Algae,X173
  18. Tomato mitochondrial uncoupling protein gene (LeUCP) silence on tomato photosynthesis, respiration and the impact resistance,S641.2
  19. The Influence of the Growth and the Content of Taxol of the Taxus Yunnanensis with Environmental Factors,S791.49
  20. Preparation and Characterization of Artificial Chloroplast Based on Natural Chloroplast,Q94-3
  21. Low phosphate on the growth of Microcystis aeruginosa,X173

CLC: > Agricultural Sciences > Crop > Economic crops > Medicinal crops > Shade drugs > Other
© 2012 www.DissertationTopic.Net  Mobile