Embryological studies inMyriophyllum intermedium DC.

  • M. Nagaraj
  • B. H. M. Nijalingappa


The flowers are polygamous, epigynous, tetramerous and actinomorphic. The anther wall consists of an epidermis, an endothecium, 2–3 middle layers, and a glandular tapetum. The tapetum is uninucleate and rarely becomes baseriate. The middle layers degenerate when the endothecial cells develop fibrous thickenings. The epidermis becomes discontinuous in the dehiscing anther. Cytokinesis in the microspore mother cells is simultaneous. The pollen grains are shed at 3-celled stage.

The ovules are anatropous and bitegmic. A group of nucellar cells lying immediately above the vascular supply become cutinized in the mature seed and forms the hypostase. The development of the embryo sac corresponds to the Polygonum Type. The antipodal cells show enormous increase in size and persist upto the late globular stage of the embryo.

The primary endosperm nucleus divides only after the division of the zygote. The endosperm is ofab initio Cellular Type. The embryogeny conforms to the second period, megarchetype III, and group I in series A′ of the system of embryogenic classification of Souèges, and corresponds to the Myriophyllum variation of the Caryophyllad type.


Pollen Tube Megaspore Mother Cell Periclinal Division Antipodal Cell Microspore Mother Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bley, F. .. “Zur Embryologie vonLaurembergia javanica (MIQ). Schindler,”Diss., Zurich, 1925.Google Scholar
  2. Crété, P... “Embryo,” inRecent Advances in the Embryology of Angiosperms, Edt. P. Maheshwari, Delhi, 1963, 171–220.Google Scholar
  3. Erdtman, G. ..Pollen Morphology and Plant Taxonomy—Angiosperms, Waltham, U.S.A., 1952.Google Scholar
  4. Gamble, J. S...Flora of the Presidency of Madras, 1928,1, 320–321.Google Scholar
  5. Johansen, D. A. ..Plant Embryology, Waltham, Mass., U.S.A., 1950.Google Scholar
  6. Jönsson, B... “Om embryosäckens utveckling hos Angiosperma,”Lunds Univ. Årsskr., 1880,16, 1–86.Google Scholar
  7. *Jørgensen, C. A... “Studies on Callitrichaceae,”Bot. Tiddskr., 1923,38, 81–126.Google Scholar
  8. Kapil, R. N... “Some recent examples of the Value of Embryology in relation to taxonomy,”Bull. Bot. Sur. India, 1962,4, 57–66.Google Scholar
  9. Maheshwari, P. ..An Introduction to the Embryology of Angiosperms, New York, 1950.Google Scholar
  10. Nijalingappa, B. H. M... “Morphological studies inMyriophyllum intermedium DC.,”Curr. Sci., 1967,36, 104–105.Google Scholar
  11. Schindler, A. K. .. “Halorrhagaceae,” in Engler’sDas Pflanzenreich., Leipzig, 1905.Google Scholar
  12. Schnarf, K. ..Vergleichende Embryologie der Angiospermen, Berlin, 1931.Google Scholar
  13. Souèges, R... “Embryogenie des Haloragacées. Développement de l’ embryuon chez leMyriophyllum alterniflorum DC,”C.R. Acad. Sci., Paris, 1940,211, 185–87.Google Scholar
  14. Stolt, K. A. H... “Die Embryologie vonMyriophyllum alterniflorum DC,”Svensk. Bot. Tidskr., 1928,22, 305–19.Google Scholar
  15. Warming, E. .. “Observations sur la valeur systematique de l’ ovule,”Mindeskrift for Jepetus Steenstrup, Kobenhavn, 1914.Google Scholar
  16. Wodehouse, R. P. ..Pollen Grains, New York, 1935.Google Scholar

Copyright information

© Indian Academy of Sciences 1967

Authors and Affiliations

  • M. Nagaraj
    • 1
  • B. H. M. Nijalingappa
    • 1
  1. 1.Department of BotanyCentral CollegeBangaloreIndia

Personalised recommendations