Hypergravity and ageing in Drosophila melanogaster. 2. Longevity.

Area of Science:

• * Astrobiology and Gravitational Biology
• * Model Organism Research

Background:

• * Understanding the effects of altered gravity on biological systems is crucial for space exploration.
• * Drosophila melanogaster serves as a valuable model organism for aging and physiological studies.

Purpose of the Study:

• * To investigate the impact of varying gravity levels on the longevity of Drosophila melanogaster.
• * To assess how breeding conditions influence the response to hypergravity.

Main Methods:

• * Drosophila melanogaster lifespan was monitored under different gravitational conditions (1-5g).
• * Experiments were conducted across three breeding conditions of varying quality.
• * Comparative analysis of longevity data was performed across gravity levels and breeding conditions.

Main Results:

• * A slight decrease in longevity was observed between 1-4g in the two best breeding conditions.
• * Significant longevity reduction occurred in all hypergravity groups for the poorest breeding condition.
• * Longevity decreased at 5g in the superior breeding conditions.

Conclusions:

• * Hypergravity negatively affects Drosophila melanogaster longevity, with effects amplified by poorer breeding conditions.
• * Results align with Pearl's rate-of-living theory, suggesting increased metabolic stress under hypergravity.
• * Breeding quality is a critical factor modulating the impact of gravitational stress on lifespan.