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  • Title
  • DEDICATION
  • CERTIFICATE
  • DECLARATION
  • ACKNOWLEDGEMENT
  • CONTENTS
  • Part I Cytological studies in Asteraceae
  • Introduction
  • Materials
  • 1. Eleplantopus scaber
  • 2. Phyliocephalum rangacharii
  • 3. Vernonia cinerea
  • 4. Adenostemma lavenia
  • 5. Ageratum conyzoides
  • 6. Ageratum haustonianum Miller.
  • 7. Chromolaena odorata
  • Fig. Caption 1-9: List of members Investigated
  • 8. Eupotorium triplinerve Vahl.
  • 9. Mikania cordata
  • 10. Conyza bonariensis
  • 11. Conyza canadensis
  • 12. Dichrocephala chrysanthemifolia DC
  • 13. Erigeron mucronatus DC.
  • 14. Blumea lacera DC.
  • 15. Blumea mollis (D.Don) Merr
  • 16. Blumea oxyodonta DC
  • Fig. Caption 10 -18: List of members investigated
  • 17. Sphaeranthus indicus Linn
  • 18. Vicoa indira DC
  • 19. Acanthospermum hispidum DC
  • 20. Bidens pilosa Linr
  • 21. Cosmos bipinnatus Cav. cv. Orange
  • 22. Cosmos bipinnatus Cav. cv. Yellow
  • 23. Cosmos caudatus Kunth
  • 24. Eclipta prostrata (Linn) Linn
  • 25. Galinsoga parvifora Cav.
  • Fig. Caption 19 -27: List of members investigated
  • 26. Melampodium paludosm B.H.& K.
  • 27. Parthenium hysterophorus Linn
  • 28. Sigesbeckia orientalis Linn
  • 29. Spilanthes calva Dc
  • 30. Spilanthes ciliata H.B.K
  • 31. Spilanthes radicans Jacq
  • 32. Spilanthes uliginosa Sw
  • 33. Synedrella nodifrora, Gaertn
  • Fig. Caption 28 -36: List of members investigated
  • 34. Tithonia diversifolia A.Gray
  • 35. Tridax procumbens Linn
  • 36. Wedelia chinensis (Osbeck) Merrill
  • 37. Wedelia trilobata (Linn) Hitch
  • 38. Zinnia elegans Jacq
  • 39. Tagetes ereda Linn cv. orange
  • 40. Tagetes erecta Linn cv pale yellow
  • 41. Tagetes ereda Linn cv Yellow
  • 42. Tagetes patula Linn.
  • Fig. Caption 37 -45: List of members investigated
  • 43. Chrysanthemum parthenium (Linn) Benth
  • 44. Crossocephalum crepidioides (Benth) S. Moore
  • 45. Emilia sonchifolia (Linn) Dc
  • 46. Notonia grandiflora Dc
  • 47. Sonchus oleraceus Linn
  • Fig. Caption 46 -47: List of members investigated
  • Methods
  • a) Mitotic squash experiments
  • b) Meiotic smear experiments.
  • c) Detailed karyomorphological studies by image analysis system
  • Photographs and image processing
  • Quantitative karyotyping of the chromosomes
  • Quantitative idiograms of chromosomes
  • Observation
  • Fig. 1d to 5d -Comparative idiogram chart of various taxa studied
  • Fig. 6d to 10d - Comparative idiogram chart of various taxa studied
  • Fig.11d to 15d - Comparative idiograrn chart of various taxa studied
  • Fig. 16d to 20d - Comparative idiogram chart of various taxa studied
  • Fig. 21d to 25d -Comparative idiogram chart of various taxa studied
  • Fig. 26d to 30d - Comparative idiogram chart of various taxa studied
  • Fig. 31d to 35d - Comparative idiogram chart of various taxa studied
  • Fig. 36d to 40d - Comparative idiogram chart of various taxa studied
  • Fig. 41d to 44d - Comparative idiogram chart of various taxa studied
  • Fig. 45d to 47d - Comparative idiogram chart of various taxa studied
  • Table: 49 Summary of the Karyomorphometerial analysis on the forty seven taxa investigated
  • DISCUSSION
  • a) Chromosome numbers in the genera investigated
  • b) Basic chromosome number
  • c) Polyploidy
  • d) Karyomorphometrical analysis
  • e) Cytological evolution in Asteraceae
  • Summary
  • Part II Characterization of Phytochemical diversity within Asteraceae
  • Materials and methods
  • Plant materials
  • Isolation of essential oil
  • Qualitative analysis
  • Quantitative analysis
  • Chemotaxonomic evaluation
  • Evaluation of ecological role of aerpenoids
  • Observations
  • Table 50: List of various taxa investigated for their major essential oil components and chemotypes
  • Table 51: Distribution of essential oil components in the taxa investigated
  • Table 52: Chemical affnities of the various taxa investigated in Asteraceae
  • Table 53: Previous reports on major essential oil constituents in Asteraeeae
  • Teble 54: Value added properties of various essential oil yielding plants of Asteraceae
  • DISCUSSION
  • Physico-chemical characterisation of essential oils in the taxa investigated
  • Chemical ecology of terpenoids in Asteraceae
  • Summary
  • References