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The Choices of P. polycephalum

CSEF · 2012 Microbiology (General)

Junyu Yang · Carden School of Whittier, Whittier, Los Angeles County

Overview

Objectives/Goals The objective of my experimet is to see the reaction of the protist the Physarum polycephalum (also known as the "true slime mold") when confronted on all sides by a mixture of a repellant and an attractant while situated in an ideal environment. Methods/Materials A culture of Physarum polycephalum was grown on nutrient agar in a petri dish. It was situated in the middle, with a ring of oatmeal around it. The oatmeal was the ideal environment. Beyond the ring of oatmeal there was a circle of the attractant-repellant mixture. Two attractant-repellant mixtures were used: Valerian root/salt and Valerian root/light. Results The Physarum polycephalum, when confronted with Valerian root/salt, stayed within the oatmeal boundaries. When confronted with Valerian root/light, it went on to the attractant/repellant mixture. In both cases, there was heavy microbial contamination. Conclusions/Discussion In conclusion, salt is a stronger repellant of the Physarum polycephalum than light.

Summary statement

A culture of the Physarum polycephalum, a slime mold, was placed in an "ideal enviroment" while being confronted by a mixture of an attractant and a repellant, and its actions were observed.

Help received

Mother and Father bought me materials.

Competition history

  • CSEF 2012 Microbiology (General) · Entry J1516

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