Plant Biol (Stuttg) 2002; 4(5): 640-646
DOI: 10.1055/s-2002-35433
Original Paper
Georg Thieme Verlag Stuttgart ·New York

Pollination Biology of Distylous Rubiaceae in the Atlantic Rain Forest, SE Brazil

C. C. De Castro 1 , P. E. De Oliveira 2
  • 1 Depto. Botânica, Universidade Estadual de Campinas, Campinas, SE Brazil
  • 2 Instituto de Biociências, Universidade Federal de Uberlândia, Rua Duque de Caxias, 285, CP 593, CEP 38400-902, Uberlândia, MG, SE Brazil
Further Information

Publication History

Received: October 30, 2001

Accepted: June 21, 2002

Publication Date:
15 November 2002 (online)

Abstract

Data on pollination biology constitute important clues for the comprehension of pollen flow and genetic differentiation in plant populations. Pollinator type, availability and behaviour may modify morphological and mating patterns in populations of typically distylous species. This study investigates the pollination biology of four distylous species of Rubiaceae in the Atlantic rain forest, SE Brazil. Data on flowering phenology, floral lifespan, stigmatic receptivity, pollen availability, nectar volume and concentration, and pollinator activity were collected. The species studied flower sequentially throughout the wet season, and produce terminal inflorescences which bear small, tubular, diurnal, nectariferous flowers. Despite these similarities, some of the species studied are pollinated by different groups of pollinators, probably due to their distribution, availability of flowers and corolla length. On the other hand, pollinator specificity does not seem to be so important for distylous species. Long mouthparts, like those of most of the recorded pollinators, may reach lower sexual organs and, together with the self- and intramorph-incompatibilities observed, be sufficient to perform legitimate pollination and maintain levels of intermorph mating.

References

  • 01 Barrett,  S. C.. (1992) Heterostylous genetic polymorphisms: model systems for evolutionary analysis. Evolution and function of heterostyly. Barret, S. C. H., ed. Berlin; Springer-Verlag pp. 1-25
  • 02 Beach,  J. H., and Bawa,  K. S.. (1980);  Role of pollinators in the evolution of dioecy from distyly.  Evolution. 34 1138-1142
  • 03 Björkman,  T.. (1995);  The effectiveness of heterostyly in preventing illegitimate pollinations in dish-shaped flowers.  Sexual Plant Reproduction. 8 143-146
  • 04 Castro,  C. C.. (2001) Breeding system and floral morphometry of distylous Rubiaceae in the Atlantic rain forest, SE Brazil. Biologia reprodutiva de rubiáceas distílicas de Mata Atlântica. PhD thesis Universidade Estadual de Campinas, Brazil p. 60
  • 05 Castro,  C. C., and Oliveira,  P. E.. (2001);  Reproductive biology of the protandrous Ferdinandusa speciosa Pohl (Rubiaceae) in southeastern SE Brazil.  Revista Brasileira de Botânica. 24 167-172
  • 06 Charlesworth,  D., and Charlesworth,  B.. (1979);  A model for the evolution of heterostyly.  American Naturalist. 114 467-498
  • 07 Cruden,  R. W.,, Herman,  S. M.,, and Peterson,  S.. (1983) Patterns of nectar production and plant-pollinator coevolution. The biology of nectarines. Bentley, B. and Elias, T., eds. New York; Columbia University Press pp. 80-125
  • 08 Dafni,  A.. (1992) Pollination ecology - A practical approach. Dafni, A., ed. Oxford; Oxford University Press
  • 09 De Granges,  J. L.. (1978);  Organization of a tropical nectar feeding bird guild in a variable environment.  Living Bird. 17 199-236
  • 10 Dulberger,  R.. (1992) Floral dimorphisms and their functional significance in the heterostylous syndrome. Evolution and function of heterostyly. Barrett, S. C. H., ed. Berlin; Springer-Verlag pp. 41-84
  • 11 Fournier,  L. A.. (1974);  Un método cuantitativo para la medición de características fenológicas en árboles.  Turrialba. 24 422-423
  • 12 Gajardo,  I. C. S.. (1997) Padrões fenológicos de Rubiaceae do sub-bosque em Floresta Atlântica. Master thesis, Universidade Estadual Paulista, Brazil
  • 13 Ganders,  F. R.. (1979);  The biology of heterostyly.  New Zealand Journal of Botany. 17 607-635
  • 14 Gentry,  A. H., and Emmons,  L. H.. (1987);  Geographical variation in fertility, phenology and composition of the understory of Neotropical forests.  Biotropica. 19 216-227
  • 15 Hamilton,  C. W.. (1990);  Variations on a distylous theme in a Mesoamerican Psychotria subgenus Psychotria (Rubiaceae).  Memoirs of the New York Botanical Gardens. 55 62-75
  • 16 Herman,  B. P.,, Tarum,  K. M.,, Russel,  J. W.,, and Dollahon,  N. R.. (1999);  Quantitative evaluation of stigma polymorphism in a tristylous weed, Lithrum salicaria (Lithraceae).  American Journal of Botany. 86 1121-1129
  • 17 Harborne,  J. B.. (1988) Biochemistry of plant pollination. Introduction to ecological biochemistry, 3rd ed. Harborne, J. B., ed. London; Academic Press pp. 42-81
  • 18 Kearns,  C. A., and Inouye,  D. W.. (1993) Techniques for pollination biologists. Niwot; University press of Colorado
  • 19 Khon,  J. K., and Barrett,  S. C. H.. (1992);  Experimental studies on the functional significance of heterostyly.  Evolution. 46 43-55
  • 20 Köppen,  W.. (1948) Climatologia: un estudio de los climas de la tierra. México; F. C. C
  • 21 Kress,  W. J., and Beach,  J. H.. (1994) Flowering plant reproductive systems. La Selva: ecology and natural history of a neotropical rain forest. McDade, L. A., Bawa, K. S., Hespenheide, H. A., and Hartshorn, G. S., eds. Chicago; University Chicago Press pp. 161-182
  • 22 Laska,  M. S.. (1997);  Structure of understory shrub assemblages in adjacent secondary and old growth tropical wet forests, Costa Rica.  Biotropica. 29 29-37
  • 23 Lloyd,  D. G.. (1979);  Evolution towards dioecy in heterostylous populations.  Plant Systematics and Evolution. 131 71-80
  • 24 Lloyd,  D. G., and Webb,  C. J.. (1992 a) The evolution of heterostyly. Evolution and function of heterostyly. Barret, S. C. H., ed. Berlin; Springer-Verlag pp. 151-178
  • 25 Lloyd,  D. G., and Webb,  C. J.. (1992 b) The selection of heterostyly. Evolution and function of heterostyly. Barret, S. C. H., ed. Berlin; Springer-Verlag pp. 151-178
  • 26 Oleson,  J. M.. (1979);  Floral morphology and pollen flow in the heterostylous Pulmonaria obscura Dumort (Boraginaceae).  New Phytologist. 70 599-605
  • 27 Opler,  P. A.. (1983) Nectar production in a tropical ecosystem. The biology of nectarines. Bentley, B. and Elias, T., eds. New York; Columbia University Press pp. 30-79
  • 28 Pailler,  T.,, Humeau,  L.,, Figier,  J.,, and Thompson,  J. D.. (1998);  Reproductive trait variation in the functionally dioecious and morphologically heterostylous island endemic Chalassia coralloides (Rubiaceae).  Biological Journal of the Linnean Society. 64 297-313
  • 29 Passos,  L., and Sazima,  M.. (1995);  Reproductive biology of the distylous Manettia luteo-rubra (Rubiaceae).  Botanica Acta. 108 309-313
  • 30 Proctor,  M.,, Yeo,  P.,, and Lack,  A.. (1996) The natural history of pollination. London; Harper Collins Publishers
  • 31 Ree,  R. H.. (1997);  Pollen flow, fecundity, and adaptive significance of heterostyly in Palicourea padifolia (Rubiaceae).  Biotropica. 29 298-308
  • 32 Richards,  J. H., and Koptur,  S.. (1993);  Floral variation and distyly in Guettarda scabra L. (Rubiaceae).  American Journal of Botany. 80 31-40
  • 33 Robbrecht,  E.. (1988);  Tropical woody Rubiaceae.  Opera Botanica Belgica. 1 1-271
  • 34 Roubik,  D. W.. (1989) Foraging and pollination. Ecology and natural history of tropical bees. Roubik, D. W., ed. Cambridge; Cambridge Tropical Biology Series pp. 71-131
  • 35 Scoble,  M. J.. (1995) Environmental and ecological importance of Lepidoptera. The Lepidoptera - Form, function and diversity. Scoble, M. J. ed. Oxford; Oxford University Press pp. 177-178
  • 36 Sobrevilla,  C.,, Ramirez,  N.,, and Enrech,  N. X.. (1983);  Reproductive biology of Palicourea fendleri and P. petiolaris (Rubiaceae), heterostylous shrubs of a tropical cloud forest in Venezuela.  Biotropica. 15 161-169
  • 37 Sokal,  R. R., and Rohlf,  J. R. F.. (1981) Biometry, 2nd ed. San Francisco; W. H. Freeman
  • 38 Stone,  J. L.. (1995);  Pollen donation patterns in tropical distylous shrub (Psychotria suerrensis; Rubiaceae).  American Journal of Botany. 82 1390-1398
  • 39 Taylor,  C. M.. (1996);  Overview of the Psychotrieae (Rubiaceae) in the Neotropics.  Opera Botanica Belgica. 7 261-270
  • 40 Viana,  V. M., and Tabanez,  A. A.. (1997) Biology and conservation of forest fragments in the SE Brazilian Atlantic Moist Forest. Forest patches in tropical landscapes. Shelhas, J., Greenberg, R., eds. Washington DC; Island Press
  • 41 Waser,  N. N.,, Chittka,  L.,, Price,  M. V.,, Williams,  N. M.,, and Ollerton,  J.. (1996);  Generalization in pollination systems, and why it matters.  Ecology. 77 1043-1060
  • 42 Walsh,  R. P. D.. (1996) The climate. The tropical rain forest: an ecological study. Richards, P. W., ed. Cambridge; Cambridge University Press pp. 159-205
  • 43 Whitten,  W. M.,, Young,  A. M.,, and Stern,  D. L.. (1993);  Nonfloral sources of chemical that attract male euglossine bees (Apidae, Euglossini).  Journal of Chemical Ecology. 19 3017-3027

C. C. De Castro

Depto. Botânica
Universidade Estadual de Campinas

CP 6109
CEP 13083-970
Campinas, SP
SE Brazil

Email: cibelecastro@hotmail.com

Section Editor: G. Gottsberger