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Updated: Mar 1, 2026
07:07
Author Spotlight: A High-Resolution, Single-Grain, In Vivo Pollen Hydration Bioassay for Arabidopsis thaliana
Published on: June 30, 2023
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DOES INTERFERENCE COMPETITION AMONG POLLEN GRAINS OCCUR IN WILD RADISH?
Diane L Marshall1, Michael W Folsom Colleen Hatfield1, Toby Bennett1
1Department of Biology, University of New Mexico, Albuquerque, New Mexico, 87131.
Summary
Plant sexual selection may involve pollen interference competition, where pollen grains hinder each other
Area of Science:
- Plant reproduction
- Sexual selection in plants
- Plant ecology
Background:
- Sexual selection in plants has traditionally focused on pollen tube growth speed.
- Pollen competition can also occur via interference, affecting pollen germination and growth.
- The role of interference competition among pollen grains is less understood.
Purpose of the Study:
- To investigate interference competition among pollen grains in wild radish (Raphanus raphanistrum).
- To determine if pollen grains from different donors interfere with each other's germination and growth.
Main Methods:
- Two experiments were conducted using wild radish pollen.
- Pollen germination rates were compared between single-donor and mixed-donor pollinations.
- The effect of direct pollen contact on interference was examined.
Main Results:
- Pollen germination was reduced in mixed-donor pollinations compared to single-donor pollinations, indicating interference.
- Interference was observed only when pollen grains from different donors were in direct contact.
- Interference competition influenced the frequency of seeds sired by different pollen donors.
Conclusions:
- Interference competition among pollen grains is a significant factor in wild radish reproduction.
- This form of competition may play a crucial role in the ecology and evolution of plant reproduction, especially with mixed pollen loads.
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