Abstract
The gynoecial development inEnicostemma littorale Blume (Gentianaceae) has been studied. The bicarpellary, syncarpous gynoecium begins its development in an apocarpous fashion. The free carpels of the young gynoecium remain open and resemble those ofMichelia champaca, Polyalthia longifolia andCananga odorata studied earlier. The young carpel exhibits initial abaxial overgrowth followed by expansion of the adaxial surface while the laminai part develops. The marginal meristem continues to be active and proliferates into a much folded structure (the placenta) on which numerous ovules arise. The two carpels fuse by their margins and form the unilocular syncarpous gynoecium with parietal placentation. This postgenital fusion is initiated by the contact of the abaxial protodermal layers of the adjacent margins. The homologies of the carpel and gynoecium are discussed in the light of recent views on the nature of the gynoecium.
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References
Bailey I W and Swamy B G L 1951 The conduplicate carpel of dicotyledons and its initial trends of specialization;Am. J. Bot. 38 373–379
Jensen W A 1962 Botanical Histochemistry; (London: W H Freeman)
Padmanabhan D 1967 New aspects in the ontogeny of carpels inMichelia champaca Linn.;Proc. Indian Acad. Sci. B 63 75–82
Padmanabhan D 1968 A comparative study of leaf and carpel ontogeny inPolyalthia longifoali (Sonnert.) Thwaites;J. Indian Bot. Soc. 47 322–328
Periasamy K and Swamy B G L 1957 The conduplicate carpel ofCananga odorata;J. Arnold Arb. 37 366–372
Puri V 1961 The classical concept of the angiosperm carpel. A reassessment;J. Indian Bot. Soc. 40 511–524
Richardson F C 1969 Morphological studies of the Nymphaeaceae IV. Structure and development of the flower ofBrasenia schreberei Gmel.;Univ. Calif. Publ. in Bot. No. 47
Sass J E 1961Botanical Microtechnique (Ames: Iowa Univ. Press)
Sattler R 1974 A new approach to gynoecial morphology;Phytomorphology 24 22–34
Swamy B G L and Periasamy K 1964 The concept of the conduplicate carpel;Phytomorphology 14 319–327
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Padmanabhan, D., Regupathy, D. & Veni, S.P. Gynoecial ontogeny inEnicostemma littorale Blume. Proc. Indian Acad. Sci. 87, 83–92 (1978). https://doi.org/10.1007/BF03046956
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DOI: https://doi.org/10.1007/BF03046956