I= INVESTIGATIONS ON RHODOPHYTA FROM THE COAST OF KARACHI WITH SPECIAL REFERENCE TO NEMALIALES
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Title of Thesis
INVESTIGATIONS ON RHODOPHYTA FROM THE COAST OF KARACHI WITH SPECIAL REFERENCE TO NEMALIALES

Author(s)
Syed Afaq Husain
Institute/University/Department Details
University of Karachi/ Department of Botany
Session
1992
Subject
Number of Pages
424
Keywords (Extracted from title, table of contents and abstract of thesis)
rhodophyta, liagoraceae. galaxauraceae, gelidiaceae, hypneaceae, dermonema abbottiae, gelidium usmanghanii, helminthocladia nizamuddinii, scinaia saifullahii, s. shameelii, gelidium pusillum subsp. pakistanicum, scinaia moniliformis subsp. pakistanensis, dermonema harvey ex heydrich, helminthocladia j. agardh, hypnea pannosa j. agardh, nemaliales

Abstract
Nine species of Rhodophyta belonging to the families of Liagoraceae. Galaxauraceae. Gelidiaceae and Hypneaceae have been extensively collected from Karachi and the adjoining coastal areas and for the first time investigation circumscribing their external characters. Anatomical structures, development of their reproductive bodies and post fertilization changes as well as their growth patterns. Out of these, five viz. Dermonema abbottiae. Gelidium usmanghanii. Helminthocladia nizamuddinii. Scinaia Saifullahii and S. shameelii have been described as new species and two viz. Gelidium pusillum subsp. pakistanicum and Scinaia moniliformis subsp. pakistanensis as new subspecies. The general Dermonema Harvey ex Heydrich and Helminthocladia J. Agardh have been reported for the first time from the coast of Pakistan and Hypnea pannosa J. Agardh is also a new record from this area

Apart from Gelidium pusillum (Stackhouse) Le jolis and Scinaia shameelii sp. nov., the other seven species have also been investigated phycochemically to document their fatty acid and sterol profiles. Saturated and unsaturated fatty acids present in these species have been analysed qualitatively as well as quantitatively. The sterols having cholestan, stigmastan and cycloartan nuclei were isolated and their structures determined. A variety of novel compounds e.g. brominated sesquiterpones were isolated and determined from Hypnea pannosa J. Agardh. All the isolated chemical constituents are the first report from respective species.

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4584.62 KB
S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents/ Abstract 0
151.84 KB
2 1 Introduction 5
49.72 KB
3 2 Materuilas And Methods 10
123.16 KB
  2.1 Materials 15
  2.2 Isolation Of Fatty Acid Fraction 16
  2.3 Extraction Of Sterol Fraction And Isolation Of Compounds 17
  2.4 Instrumentation 20
4 3 Results And Discussion 22
3986.9 KB
  3.1 Dermonema Abbottiae Sp. Nov. 28
  3.2 Helminthocladia Nizamuddinii Sp. Nov. 69
  3.3 Scinaia Hatei Borgesen 1931 120
  3.4 Scinaia Moniliformis J. Agardh 1885 Pakistanensis Subsp. Nov. 153
  3.5 Scinaia Saifullahii Sp. Nov. 196
  3.6 Scinaia Shameelii Sp. Nov. 240
  3.7 Gelidium Sumanghanii Sp. Nov. 299
  3.8 Gelidium Pusillum (Stackhouse) Le Jolis 1795 Pakistanicum Subsp. Nov. 348
  3.9 Hypnea Panrosa J. Agardh 1852 371
5 4 Concluding Remarks 393
45.28 KB
  4.1 Tables 396
6 5 Acknowledgements 398
28.78 KB
7 6 References 401
710.43 KB
  6.1 Appendix-I. Published Papers 424