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Karyological annotation onLimnophyton obtusifolium (L.) Miq

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Proceedings / Indian Academy of Sciences

Abstract

The karyotaxonomy ofLimnophyton obtusifolium (L.) Miq. has been critically interpreted. The karyotype is essentially asymmetric in character. This appears to be substantiated by the fairly high disparity index of chromosomes, being as much as 65%. The 24-chromosome form is presumably a karyo-ecotype and tetrasomic derivative from the 22-chromosome form, specially adapted to helophytic environment. Interestingly enough, while the 22-chromosome form shows only one pair of satellited chromosomes in its karyotype, the present type invariably shows two such pairs, nearly identical with the single pair in the other form. From the standpoint of karyotaxonomy,Limnophyton is a blend of primitive and advanced characters. The high value of recombination index suggests the incapacity of this taxon for outcrossing and enlarging itself beyond the status of a tritypic genus.

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References

  • Brown W V 1946 Cytological studies in the Alismataceae;Bot. Gaz. 108 262–267

    Article  Google Scholar 

  • Castro D and Wager N 1950 Preliminary observations on the cytology of the genusAlisma L. in Portugal;Genet. Iber. 2 75–82

    Google Scholar 

  • Erlandsson S 1946 Chromosome studies of threeAlisma species;Sven. Bot. Tidskr. 40 427–435

    Google Scholar 

  • Harada I 1956 Cytological studies in Helobiae I. Chromosome idiograms and a list of chromosome number in seven families;Cytologia 21 306–328

    Google Scholar 

  • Hutchinson J 1959The families of flowering plants Vol. II Monocotyledons; (Oxford Univ. Press)

  • Krishnappa D G 1967 Cytological studies in aquatic angiosperms;Proc. Indian Sci. Cong. 54 392

    Google Scholar 

  • Murthy S K N 1933 Cytological and morphological studies inLimnophyton obtusifolium Miq.;J. Mysore Univ. 7 1–32

    Google Scholar 

  • Rangaswami Ayyangar K 1972 Cytological investigations inLimnophyton obtusifolium (L.) Miq.;Proc. Indian Sci. Cong. 59 351

    Google Scholar 

  • Rangaswami Ayyangar K and Sampathkumar R 1968 An improved method of preparing permanent root tip squashes using propiono-orcein;Proc. Indian Sci. Cong. 55 383–384

    Google Scholar 

  • Sharma A K and Chatterjee T 1967 Cytotaxonomy of Helobiae with special reference to the mode of evolution;Cytologia 32 286–307

    Google Scholar 

  • Sharma A K and Mukherji R 1955 Cytology of two members of Alismaceae;Bull. Bot. Soc. Bengal 9 32–35

    Google Scholar 

  • Sheriff A and Nagaraj M 1966 A note on the karyomorphologyof Limnophyton obtusifolium;Curr. Sci. 35 19–20

    Google Scholar 

  • Stebbins G L 1971Chromosomal evolution in higher plants; (London: Edward Arnold)

    Google Scholar 

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Authors and Affiliations

  1. Department of Botany, Annamalai University, 608 202, Annamalainagar, India

    K Rangaswami Ayyangar & R Sampathkumar

Authors
  1. K Rangaswami Ayyangar
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  2. R Sampathkumar
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Ayyangar, K.R., Sampathkumar, R. Karyological annotation onLimnophyton obtusifolium (L.) Miq. Proc. Indian Acad. Sci. 89, 407–413 (1980). https://doi.org/10.1007/BF03046219

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  • DOI: https://doi.org/10.1007/BF03046219

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