Published Apr 19, 2021 on Dryad.
https://doi.org/10.5061/dryad.d7wm37pz2
Cite this dataset
Apirajkamol, Nonthakorn (Beatrice) et al. (2021). Data from: Oxidative stress delays development and alters gene expression in the agricultural pest moth, Helicoverpa armigera [Dataset]. Dryad. https://doi.org/10.5061/dryad.d7wm37pz2
Abstract
Stress is a widespread phenomenon that all organisms must endure. Common in nature is oxidative stress, which can interrupt cell homeostasis to cause cell damage and may be derived from respiration or from environmental exposure through diet. As a result of the routine exposure from respiration, many organisms can mitigate the effects of oxidative stress, but less is known about responses to oxidative stress from other sources. Helicoverpa armigera is a major agricultural pest moth that causes significant damage to crops worldwide. Here, we examined the effects of oxidative stress on H. armigera by chronically exposing individuals to paraquat - a free radical producer - and measuring changes in development (weight, developmental rate, lifespan), and gene expression.
We found that oxidative stress strongly affected development in H. armigera, with stressed samples spending more time as caterpillars than control samples (>24 vs. ~15 days, respectively) and living longer overall. We found 1,618 up- and 761 down-regulated genes, respectively, in stressed vs. control samples. In the up-regulated gene set was an over-representation of biological processes related to cuticle and chitin development, glycine metabolism, and oxidation-reduction.
Oxidative stress clearly impacts physiology and biochemistry in H. armigera and the interesting finding of an extended lifespan in stressed individuals could demonstrate hormesis, the process whereby toxic compounds can actually be beneficial at low doses. Collectively, our findings provide new insights into physiological and gene expression responses to oxidative stress in invertebrates.
Methods
We examined the effects of oxidative stress on Helicoverpa armigera by chronically exposing individuals to paraquat - a free radical producer - and measuring changes in development (weight, developmental rate, lifespan), and gene expression. Please see the manuscript for full details.
Funding
Australian Research Council, Award: DE160100685
Centre for Biodiversity Analysis; Australian National University, Award: Ignition Grant
Commonwealth Scientific and Industrial Research Organisation, Award: n/a
Centre for Biodiversity Analysis; Australian National University, Award: Ignition Grant