Related Experiment Video
Updated: Jun 23, 2026
07:07
A High-Resolution, Single-Grain, In Vivo Pollen Hydration Bioassay for Arabidopsis thaliana
Published on: June 30, 2023
Pollination syndromes in African Marantaceae
Alexandra C Ley1, Regine Classen-Bockhoff
1Institut für Spezielle Botanik und Botanischer Garten, Johannes Gutenberg-Universität Mainz, Germany. aley@uni-mainz.de
Annals of Botany
|May 16, 2009
Summary
Marantaceae flowers in Gabon exhibit diverse types, each specialized for specific bee or sunbird pollinators. This floral diversity and pollinator specialization reveal evolutionary pathways in pollen transfer.
Area of Science:
- Botany
- Ecology
- Evolutionary Biology
Background:
- The Marantaceae family, with 550 species, is the most derived in the order Zingiberales.
- This family displays a complex explosive pollination mechanism, crucial for pollen transfer.
Purpose of the Study:
- To investigate the evolutionary significance of explosive pollen transfer in Marantaceae.
- To conduct comparative morphological and ecological studies in Gabon.
Main Methods:
- Field study in Gabon over 11 months, investigating 31 Marantaceae species.
- Analysis of floral diversity, pollinator spectrum, and ecological factors like nectar concentration and volume.
Main Results:
- Five distinct flower types identified based on size, pigmentation, floral tube arrangement, nectar guides, and staminodes.
- Each flower type is associated with specific functional pollinator groups, defining distinct pollination syndromes.
- Pollinators include small, medium, and large bees (e.g., Thrinchostoma, Amegilla, Xylocopa) and sunbirds, linked to specific flower morphologies.
Conclusions:
- Marantaceae individuals' longevity and pollinator ubiquity facilitate specialization into functional pollinator groups.
- Intermediate ecological values suggest potential for occasional pollinator overlap and shifts.
- Observed radiation patterns suggest similar selective pressures and evolutionary constraints across continents.
Related Concept Videos
02:40Pollination and Flower Structure
Flowers are the reproductive, seed-producing structures of angiosperms. Typically, flowers consist of sepals, petals, stamens, and carpels. Sepals and petals are the vegetative flower organs. Stamens and carpels are the reproductive organs.
02:19Morphogenesis
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
01:43Incomplete Dominance
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
01:21Frequency-dependent Selection
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.Positive Frequency-Dependent SelectionIn positive...
02:39Gene Flow
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
01:17Understanding Species and Reproductive Barriers
A species is a group of organisms that interbreed and produce fertile offspring. Typically, individuals of the same species appear similar and share common characteristics due to their highly similar genomes. However, not all organisms that look alike are members of the same species. Various mechanisms keep most species discrete. While some mechanisms prevent reproductive behavior and fertilization (pre-zygotic isolation), others prevent the production of fertile offspring after mating has...