Abstract
The paper deals with the cytological investigation of eight taxa,viz., Hydrolea zeylanica Vahl (2n=24),Ipomoea aquatica Forsk. (2n=30, 2n=30+1),Ottelia alismoides Pers. (2n=22 and 33),Monochoria vaginalis Presl ex Kunth (2n=52),Eichhornia crassipes Solms (2n=32),Pistia stratiotes L. (2n=28),Limnophyton obtusifolium Miq. (2n=22) andAmmannia salicifolia Monti (2n=28) which were collected from the suburbs of Mysore. Of these, the chromosome numbers forHydrolea zeylanica andAmmannia salicifolia are newly reported.
Karyomorphological studies have been made inHydrolea zeylanica, Ammannia salicifolia, Ipomoea aquatica, Ottelia alismoides, Eichhornia crassipes andLymnophyton obtusifolium. Mitotc studies ofOttelia alismoides reveal the occurrence of both diploid and triploid races. Of these, triploid number of 2n=33 is the first report. An extra small chromosome from somatic nuclei is also the first record inIpomoea aquatica. Further,Ottelia alismoides shows the occurrence of univalents, tetravalents and hexavalents, whileLimnophyton obtusifolium reveals the presence of chromatin bridge, fragment chromosome and micronuclei.
Similar content being viewed by others
References
Narasimha Murthy, S. K... “Cytological and morphological studies inLimnophyton obtusifolium Mic,”Half-yearly J. Mysore Univ., 1933,7, 1–32.
Rao, N. S... “Chromosome studies in the genusIpomoea,”Curr. Sci., 1947,16, 156.
Rao, Y. S. .. “Cytological studies in Hydroch aritaceae,”Proc. 38th Indian Sci. Congr., 1950, Part 3, 67–68.
Sharma, A. K. and Bhattacharyya, B. “A study of the cytology of four members of the Hydrocharitaceae as an aid to trace the lines of evolution,”Phyton, 1956,6, 121–32.
—— and Datta, P. C... “Cytological investigations on the genusIpomoea and its importance in the study of phylogeny,”Nucleus, 1958,1, 89–122.
Sharma, A. K. and Talukdar, C. .. “Cytological investigations on some members of the Pontederiaceae,”Proc. Indian Sci. Congr., 1961, Part 3, 290–91.
Sheriff, A. and Nagaraj, M... “A note on the karyomorphology ofLimnophyton obtusifolium Miq..”Curr. Sci., 1966,35, 19–20.
Subramanyam, K...Aquatic Angiosperms, C.S.I.R., New Delhi, 1962.
Tjio, J. H. and Levan, A... “The use of oxyquinoline in chromosome analysis,”Anales de La Est. Exper. de Aula dei, 1950,2, 21–64.
Author information
Authors and Affiliations
Additional information
Communicated by Prof. L. Narayana Rao,f.a.sc.
Rights and permissions
About this article
Cite this article
Krishnappa, D.G. Cytological studies in some aquatic angiosperms. Proc. Indian Acad. Sci. 73, 179–185 (1971). https://doi.org/10.1007/BF03045290
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF03045290