Morphological aspects of four buzz-pollinated species of the tribe cassieae (Caesalpiniaceae)
The morphology, phases, rewards, attractants, visitors, pollen and P/O ratio of four buzz-pollinated species of the tribe Cassieae were analysed in order to establish their floral biology and to test the presence of morphological androecium's differentiation. We wanted to know if the morphologi...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
International Society for Horticultural Science
2001
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| Sumario: | The morphology, phases, rewards, attractants, visitors, pollen and P/O ratio of four buzz-pollinated species of the tribe Cassieae were analysed in order to establish their floral biology and to test the presence of morphological androecium's differentiation. We wanted to know if the morphological differences, when observed, reflected functional differences between the groups of stamens. Results allowed us to establish that both genera share a group of characteristics that place them in the buzz-pollination syndrome. The pollinators are bumblebees able to vibrate the stamens leading to nothotribic or sternotribic deposition of pollen. The morphological androecium's differences are more evident in Senna than in Chamaecrista, as well as the reflected functional differences: the medium stamens play a nutritional role while the longest play a reproductive one. The P/O ratio was extremely high for all the species treated and pollen production was also high. It may be related to the visitor's behaviour and would act as a reproductive strategy to assure an effective pollen deposition. |
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| Bibliografía: | Bahadur, B., Chaturvedi, A., Rama Swary, N., S.E.M. studies of pollen in relation to enantiostyly and heteranthery in Cassia (Caesalpinaceae) (1990) Current Perspectives in Palyn.l Research Vol. of the Journal of Palynology, 1990-1991, pp. 7-22 Buchmann, S.L., Buzz pollination of Cassia quiedondilla (Leguminosae) by bees of the genera Centris and Melopoma (1974) Bull. South Cal. Acad. Sci., 73, pp. 171-173 Hurley, J.P., A biophysical model for buzz pollination in angiosperms (1978) J. Theor. Biol., 72, pp. 639-657 Cruden, R.W., Pollen ovule-ratios: A conservative indicator of breeding systems in flowering plants (1977) Evolution, 31, pp. 22-46 Dulberger, R., The floral biology of Cassia didymobotrya and C (1981) Auriculata. Am. J. Bot., 68 (10), pp. 1350-1360 Erdtman, G., Pollen morphology and plant taxonomy (1952) Angiosperms. (An Introduction to Palynology)., 1, pp. I-XII. , 1-539. Almquist & Wicksell, Stockholm Faegri, K., Van Der Pijl., L., (1971) The Principles of Pollination Biology, , 2° Ed Pergamon Press Oxford Genise, J., Palacios, R., Observaciones sobre la biología floral de Prosopis II Fases florales y visitantes en el Distrito Chaqueño Serrano (1990) Darwiniana, 30, pp. 71-85 Greissl, R., Vitality analysis of monadic and polyadic pollen grains using optical contrast-fluorescence microscopy (1989) Sc. and Tech. Information, 15 (5), pp. 180-184 Irwin, H.S., Barneby, R., The American Cassiinae A synoptical revision of Leguminosae tribe Cassieae subtribe Cassiinae in the New World (1982) Memoirs of the New York Botanical Garden, 35, pp. 455-918 Kelly, K.L., ISCC-NBS color-name charts illustrated with centroid colors (1965) Suppl. to Nat. Bur. Standards Circ. 553, , U. S. Government Printing Office, Washington Osborn, M.M., Kenan, P.A., Lane, M.A., Pollination biology of Opuntia polyacantha (Cactaceae) in S (1988) Colorado. Pl. Syst. Evol., 159, pp. 85-94 Thorp, R.W., Estes, J.R., Intrafloral behavior of bees on flowers of Cassia fasciculata (1975) J. Kans. Entom. Soc., 48, pp. 175-184 |
| ISBN: | 9789066057654 |
| ISSN: | 05677572 |
| DOI: | 10.17660/ActaHortic.2001.561.26 |