Embryological studies in lentibulariaceae

I. Floral morphology and embryology ofUtricularia smithiana, Wt. Ic.
  • S. Sundara Rajan
  • D. Jeevan Kumar


Embryology ofUtricularia smithiana has been studied and its systematic position as a species separate fromUtricularia caerulea has been justified.

Floral parts arise in acropetalous succession. A transection of an young anther lobe shows a layer of microspore mother cells surrounded by tapetum, a middle layer, an endothecium and an epidermis. Microspore tetrads are decussate and tetrahedral. Tapetum is glandular. Pollen grain is shed at the 3-nucleate stage. Endothecium exhibits fibrillar thickenings.

Embryosac development is of the polygonum type. Placental nutritive tissue is present only at the micropylar region. Embryosac is surrounded by the endothelium only at the central region.

Fertilisation is porogamous and endosperm isab initio cellular. Endosperm haustoria are not very aggressive. Embryogeny conforms to solanad type. Mature embryo is undifferentiated with starch grain filled cells.


Floral Morphology Megaspore Mother Cell Embryological Study Microspore Mother Cell Microspore Tetrad 
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. Clarke, C. B... InJ. Hooker Fl. Brit., India, 1884,4, 331.Google Scholar
  2. Erdtman, G. ..An Introduction to Pollen Analysis, Waltham, Mass.Google Scholar
  3. Farooq, M... “The development of embryo inUtricularia stellaris (L.) F. var.inflexa,”Sci. & Cult., 1958,23, 479–80.Google Scholar
  4. —————.. “Studies in Lentibulariaceae. 1. The embryology ofUtricularia stellaris (L.) F. var.inflexa. Part I. Flower, organogeny, ovary, megasporogenesis and female gametophyte,”Proc. Nat. Inst. Sci. India, 1964a,30 B, 263–79.Google Scholar
  5. —————.. “Studies in Lentibulariaceae. 1. The embryology ofUtricularia stellaris (L.) var.inflexa. Part II. Microsporangium, male gametophyte, fertilization, endosperm, embryo and seed,” Ibid., 1964b,30 B, 280–99.Google Scholar
  6. —————.. “Studies in Lentibulariaceae. 2. The embryology ofUtricularia arcuata,”J. Indian bot. Soc., 1964c,44, 326–46.Google Scholar
  7. —————.. “Studies in Lentibulariaceae. The embryology ofUtricularia uliginosa,”Phytomorphology, 1965,15, 123–31.Google Scholar
  8. ————— and Siddiqui, S. A... “The embryology ofUtricularia stellaris,”Sci. & Cult., 1964,30, 394–95.Google Scholar
  9. Kausik, S. B... “Pollen development and seed formation inUtricularia caerulea,”Beih. Bot. Zbl., 1938,58A, 365–78.Google Scholar
  10. —— and Raju, M. V. S... “A contribution to the floral morphology and embryology ofUtricularia reticulata,”Proc. Ind. Acad. Sci., 1955,41B, 155–66.Google Scholar
  11. Khan, R... “A contribution to the embryology ofUtricularia flexuosa,”Phytomorphology, 1956,4, 80–117.Google Scholar
  12. Maqbool Begum.. “A contribution to the embryology ofUtricularia graminifolia,”Curr. Sci., 1964,34, 355–56.Google Scholar
  13. Shivaramaiah, G... “A contribution to the embryology ofUtricularia exoletaCurr. Sci., 1964,33 (16), 500–501.Google Scholar
  14. —————.. “Observations on the floral morphology and embryology ofUtricularia stricticaulis Stapf,”Proc. Ind. Acad. Sci., 1967,2B, 56–62.Google Scholar
  15. Wight ..Icon. t., 1577, 1850.Google Scholar
  16. Wyhe, R. B. and Yocom, A. E. “The endosperm ofUtricularia,”Univ. Iowa Studies in Nat. Hist., 1923,10, 3–18.Google Scholar

Copyright information

© Indian Academy of Sciences 1974

Authors and Affiliations

  • S. Sundara Rajan
    • 1
  • D. Jeevan Kumar
    • 1
  1. 1.Department of BotanySt. Joseph’s CollegeBangaloreIndia

Personalised recommendations