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Author Spotlight: Collective Behavioral Analysis of the Nematode, Caenorhabditis elegans

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Behavioural changes in slime moulds over time.

Angèle Rolland¹, Emilie Pasquier¹, Paul Malvezin¹

¹Research Centre on Animal Cognition (CRCA), Centre for Integrative Biology (CBI), Toulouse University, CNRS, UPS, Toulouse 31062, France.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences

|February 21, 2023

Summary

This summary is machine-generated.

Single-cell slime mould behaviour changes with age, with slower migration but preserved learning. Old slime moulds can regain performance via dormancy or fusion, preferring young slime mould cues.

Keywords:

Physarum polycephalum ageing decision making learning slime moulds

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Area of Science:

Cellular Biology
Aging Research
Behavioral Science

Background:

Unicellular organism behavior is typically studied under environmental stress.
Emerging evidence indicates age-related behavioral changes independent of external factors.
The acellular slime mould (Physarum polycephalum) is a model for cellular aging.

Purpose of the Study:

To investigate age-related behavioral changes in Physarum polycephalum across various tasks.
To determine if decision-making and learning abilities decline with age.
To explore factors influencing behavioral recovery in aged slime moulds.

Main Methods:

Tested slime mould behavioral performance (migration, decision-making, learning) across ages (1-100 weeks).
Assessed behavioral recovery through dormancy and fusion with younger individuals.
Analyzed responses to age-specific cues from clone mates.

Main Results:

Migration speed decreased with age in both favorable and adverse conditions.
Decision-making and learning abilities remained intact in older slime moulds.
Old slime moulds exhibited temporary behavioral recovery after dormancy or fusion with young ones.
Both young and old slime moulds showed a preference for cues from younger individuals.

Conclusions:

Aging in Physarum polycephalum leads to reduced mobility but not cognitive decline.
Behavioral plasticity in aging single-celled organisms is influenced by dormancy and social interactions (fusion).
Slime moulds serve as a valuable model for studying the cellular basis of aging and behavior.