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Abstract Detail


MSA - Cell and molecular biology/Physiology & Genetics

Stolze-Rybczynski, J.L. [1], Cui, Y. [1], Fischer, M.W.F. [2], Money, N.P. [1].

Adaptation of the spore discharge mechanism in the Basidiomycota.

The ballistospore discharge mechanism is a defining characteristic of the Basidiomycota. This extraordinary launch process is powered by the rapid movement of a drop of fluid, called Bullerís drop, over the spore surface. Ballistospore discharge is an example of a fast fungal movement and its analysis requires the use of ultra-high-speed video cameras. Video data and estimates of energy usage during spore discharge reveal how the mechanism is adapted to limit discharge distance in species with gilled and poroid fruiting bodies, and to maximize range in basidiomycetes that sporulate on exposed surfaces. Discharge distance is determined by both spore size and the size of Bullerís drop. The size of Bullerís drop is controlled by spore shape, which means that seemingly minor changes in spore morphology exert major effects upon discharge distance. Based on these observations, we hypothesize that evolutionary modifications to fruiting body architecture, including changes in gill separation and tube diameter, must be tightly linked to alterations in spore morphology.


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1 - Miami University, Botany, 700 East High Street, 316 Pearson Hall, Oxford, OH, 45056, USA
2 - College of Mount St. Joseph, Chemistry & Physical Sciences, 5701 Delhi Road , Cincinnati, OH, 45233, USA

Keywords:
ballistospore discharge.

Presentation Type: Oral Paper:Papers for Topics
Session: 17
Location: White Pine/Cliff Lodge - Level C
Date: Monday, July 27th, 2009
Time: 11:45 AM
Number: 17007
Abstract ID:256


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