Summary
An account of the life-history ofSonerila Wallichii with reference to microsporogenesis, megasporogenesis and embryogeny is presented in this paper. The chromosome number as determined in the pollen mother cells is eight. The ovules are bitegumentary with mostly a single and rarely multiple archesporium. Further developmental stages of the multiple archesporium to double tetrad stages have been noticed. A hypostase-like tissue at the chalazal region is prominently seen. The development of the embryosac conforms to the normal 8-nucleate type.
Endosperm is nuclear and the type of development of the embryo is akin to theCapsella-type. The basal cell of the suspensor divides by vertical walls and forms a vertical group of six cells. Some of these might further develop into groups of cells resembling multiple embryos.
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Literature Cited
George, P. C. “Observations on the megasporogenesis and embryogeny inSonerila speciosa”The Presidency College Botany Magazine, 1938,5, 26–29.
Subramanyam, K. “Gametogenesis and embryogeny in a few members of the Melastomaceæ,”J. Ind. Bot. Soc., 1942,21, 69–85.
Ziegler, A. “Beitrage zur Kenntnis des Andrœceoums und der Samen entwicklung einiger Melastomaceen,”Bot. Arch. Mez., 1925,9, 398–467.
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Communicated by Prof. L. Narayan Rao,ph.D., f.a.sc.
Sincere thanks are due to Mr. B. L. Krishnaswamy for collecting the material used in the present study.
The writer wishes to acknowledge his indebtedness to Dr. L. N. Rao, Professor of Botany, University of Mysore, for guidance and encouragement and to Mr. M. J. Thirumalachar for helpful suggestions.
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Subramanyam, K. A contribution to the life-history ofSonerila Wallichii Benn. Proc. Indian Acad. Sci. 19, 115–120 (1944). https://doi.org/10.1007/BF03049776
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DOI: https://doi.org/10.1007/BF03049776