Abstract
The embryology ofOldenlandia umbellata Linn. has been investigated. Floral parts arise in acropetalous succession. A transection of an young anther shows a group of microscope mother cells followed by a layer of tapetum, a middle layer, an endothecium and an epidermis. The uninucleate tapetum is of the glandular type. Microspore tetrads are tetrahedral and isobilateral. The pollen grain is binucleate at the time of anther dehiscence and the endothecium fibrillar. A hypodermal archesporial cell directly functions as the megaspore mother cell. Embryo sac development follows the Polygonum type. Fertilisation is porogamous. Endosperm is free nuclear and embryogeny conforms to the solanad type.
Similar content being viewed by others
References
Fagerlind, F... “Embryologische, zytologische und bestaubungs-experimentelle Studien in der Familie Rubiaceae nebst Bemerkungen uber einige Polyploiditats-probleme,”Acta Horti Bergiani, 1937,11, 195–470.
Farooq, M... “The endosperm and seed structure ofOldenlandia corymbosa Linn.,”Curr. Sci., 1958,22, 280–82.
—————.. “The embryology ofBorreria hispida K. Schum. a reinvestigation,”Jour. Indian bot. Soc., 1959,38, 280–87.
—————.. “The embryology ofGalium asperifolium Wall.,”, 1960,39, 171–75.
Ganapathy, P. M... “Floral morphology and embryology ofHydrophylax maritima,”J. Madras Univ., 1956a.26 B, 263–75.
—————.. “Female gametophyte and endosperm ofOphiorrhiza mungos,”, 1956b,26, 589–92.
Gopinath, P. M. and Chanaaveeraiah, M. S. “A contribution to the embryology ofOphiorrhiza harisiana Heyne.,”J. Karnatak Univ. (Dharwar).Sci., 1961,6, 61–70,
Houk, W. G... “Endosperm and perisperm ofCoffea with notes on the morphology of the ovule and seed development,”Amer. J. Bot., 1938,25, 56–61.
Lloyd, F. E... “The comparative embryology of the Rubiaceae,”Mem. Torr. bot. Cl., 1899,8, 1–26.
Mendes, A. J. T... “Cytological observations inCoffea. VI. Embryo and endosperm development inCoffea arabica,”Amer. J. Bot., 1941,28, 784–89.
Periaswamy, K. and Parameswaran, N. “A contribution to the floral morphology and embryology ofTorenna asiatica,”Beitr. Biol. Pflanzen., 1965,41, 123–38.
Raghavan, T. S. and Rangaswami, K. “Studies in Rubiaceae. I. Development of female gemetophyte and embryo formation inDentella repens. Forst andOldenlandia alata Koch. and some cytotaxonomical considerations,”Jour. Indian bot. Soc., 1941,20, 341–56.
Raghavan, T. S. and Srinivasan, A. R. “Studies in Rubiaceae, II.Spermacoce hispida Linn.,Guettarda speciosa Linn. and cytomorphological considerations,”Proc. Indian Acad. Sci., 1941,14 B, 412–26.
Raman, S. S... “Gametogenesis and fertilization ofStephygyne parviflora Korth,”Agra Univ. Jour. Res., 1954,3, 343–48.
Shivaramaiah, G. and Ganapathy, P. S. “A contribution to the embryology ofKnoxia corymbosa Willd,”Curr. Sci., 1961,30, 190–91.
Venkateswarlu, J., and Rajeswara Rao, G. “A contribution to the life-history ofRubia cordifolia Linn.,”Jour. Indian bot. Soc., 1958,37, 442–54.
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
Shivaramaiah, G., Rajan, S.S. A contribution to the embryology ofOldenlandia umbellata Linn.. Proc. Indian Acad. Sci. 77, 19–24 (1973). https://doi.org/10.1007/BF03045549
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF03045549