Dissertation > Excellent graduate degree dissertation topics show

Effects on Physiological Characteristics of Dendrathema Indicum L. under Drought Stress

Author: LiWenHe
Tutor: ZhuoLiHuan；HeZuo
School: Northeast Forestry University
Course: Ornamental Plants and Horticulture
Keywords: Chrysanthemum PEG Drought Stress Physiological characteristics SOD, POD, CAT isoenzyme
CLC: S682.11
Type: Master's thesis
Year: 2011
Downloads: 97
Quote: 0
Read: Download Dissertation

Abstract


The experimental study of wild chrysanthemum (Dendrathema indicum L.) seed and seedling physiological characteristics under drought stress conditions to determine the Chrysanthemum drought adaptive law to accumulate data for research Chrysanthemum drought mechanism and for indicum garden applications provide a theoretical basis . Chrysanthemum seeds of different concentrations of polyethylene glycol (PEG-6000) Stress , indicum seed germination and its growth sprouts can tolerate PEG concentration of 20 % of drought stress environment , but in the high mass concentration of PEG ( 25 % ) stress has begun germination phenomenon in concentration from 10% PEG stress began , seed germination, growth sprouts are suppressed , the indicators reflect indicum more sensitive to drought stress , can not meet the moderate and severe drought external environment. PEG simulated drought the environmental processing Chrysanthemum seedlings , measured the physiological stress indicator data show that early and late in the PEG treatment plants correspondingly different protection mechanisms . PEG concentration of 5% after the end of treatment , the Chrysanthemum plant morphology remained intact , indicating mild stress more conducive to the Chrysanthemum seedling growth . Different PEG concentration processing Chrysanthemum seedlings SOD and POD isoenzyme phenotype changed greatly CAT Compared to the relatively stable expression of SOD and POD isoenzyme may adjust the desired processing plants has changed related substances , thereby demonstrating Chrysanthemum seedling gene expression of osmotic stress reaction is a short-term , reversible regulation . Chrysanthemum seedling drought stress , seedlings rehydration , soluble sugar and malondialdehyde content is still too low , may be indicum is in the recovery period , the outside world did not produce the suitable conditions of adversity , but the plant will still be able to repair itself . SOD , POD and CAT activities and isoenzymes trend with basically the same. Drought stress 10d, drought has exceeded the load capacity of the Chrysanthemum seedlings , plant protection enzyme regulation began to decline when the 10d recovery after the water began to rise , one enzyme activity and isoenzyme expression may plants to adapt to the external environment results. To 20d , although the plant morphology severe wilting , but its activity and isozyme expression in control top indicum strong ability to survive the arid environment .

Related Dissertations

  1. Drought Stress on the Osmanthus Growth and Physiological Ecology Effect,S685.13
  2. Study on the Extraction of Volatile Oil from Hangzhou White Chrysanthemum Morifolium and Its Application in Cigarettes,TS264.3
  3. The Effect of Fertilizer Application on Yield and Quality in Chrysanthemum Morifolium,S567.239
  4. The Effect of Frequencycontron on Flow Fields Environment in Bulk Curing Barn and Quality of Flue Cured Tobacco,S572
  5. Studies on Aphid Resistance and Mechanisms in Chrysanthemum and It’s Related Species at Seedling Stage,S436.8
  6. Effects of Flooding Stress on Growth and Physiological Charcteristics of Soybean,S565.1
  7. The Effect of Water Content in Soil on Photosynthetic Physiological Characteristics of Pear and Fruit Quality,S661.2
  8. Study on Transformation of Cut Chrysanthmemum with DdICE1 Gene,S682.11
  9. The Comprehensive Appraisal of the Ornamental Value and Drought and Flooding Resistance of the Cultivars of Guoqing Chrysanthemum with Small Inflorescences,S682.11
  10. Studies on the Relationship between Lignin and Bent Neck and Aphid Resistance in Spray Cut Chrysanthemum,S682.11
  11. Study on Comprehensive Evaluation System of Cut Chrysanthemum and Genetic Analysis of Main Characters,S682.11
  12. Study on Heat Resistance of Chrysanthemum Floral Organ and Effects of Exogenously Nitric Oxide on Heat Resistance of Chrysanthemum,S682.11
  13. Studies on Aphid Resistance Identification, Resistance Related Mechanisms and LLA Gene Transformation of Cut Chrysanthemum,S682.11
  14. Study on Cold Tolerance of Flower Organ of Cut Chrysanthemum in Winter,S682.11
  15. Interspectific Hybridization between Chrysanthemum Species and Research on Resistant Germplasm Innovation,S682.11
  16. Influence of Different Plant Growth Regulators on Vase Life and Physiological Action of Cut Chrysanthemum,S682.11
  17. Identifies Differential Gene Expression Related to Gravitropism-Horizontal Gravitropism in Creeping Shoots of Ground-Cover Chrysanthemum,S682.11
  18. Study on Shade Resistance of Chrysanthemum and Its Related Taxa Seedlings,S682.11
  19. Predicting the Coupling Effects of Water and Nitrogen on External Quality of Standard Cut Chrysanthemum in Solar Greenhouse,S682.11
  20. Study on Tetraploid of Chrysanthemum Nankingense Induction in Vitro and Its Breeding Utilization,S636.9
  21. Effects of Gradually Drought on Physiological Indeces of Seeding in Tree Peony and Cloning with Sequence Analysis of Ga20-ox Synthesis of Tree Peony,S685.11

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