Deakin University
Browse

File(s) under permanent embargo

Transcriptional profiles of plasticity for desiccation stress in Drosophila

Version 2 2024-06-04, 14:04
Version 1 2018-05-25, 11:46
journal contribution
posted on 2024-06-04, 14:04 authored by AS Clemson, CM Sgrò, Marina Telonis-ScottMarina Telonis-Scott
We examined the transcriptional responses of desiccation resistance candidate genes in populations of Drosophila melanogaster divergent for desiccation resistance and in capacity to improve resistance via phenotypic plasticity. Adult females from temperate and tropical eastern Australian populations were exposed to a rapid desiccation hardening (RDH) treatment, and groups without RDH to acute desiccation stress, and the transcript expression of 12 candidate desiccation genes were temporally profiled during, and in recovery from stress. We found that desiccation exposure resulted in largely transitory, stress-specific transcriptional changes in all but one gene. However linking the expression profiles to the population-level phenotypic divergence was difficult given subtle, and time-point specific population expression variation. Nonetheless, rapid desiccation hardening had the largest effect on gene expression, resulting in distinct molecular profiles. We report a hitherto uncharacterised desiccation molecular hardening response where prior exposure essentially 'primes' genes to respond to subsequent stress without discernible transcript changes prior to stress. This, taken together with some population gene expression variation of several bona fide desiccation candidates associated with different water balance strategies speaks of the complexity of natural desiccation resistance and plasticity and provides new avenues for understanding the molecular basis of a trait of ecological significance.

History

Journal

Comparative Biochemistry and Physiology Part - B: Biochemistry and Molecular Biology

Volume

216

Pagination

1-9

Location

England

ISSN

1096-4959

eISSN

1879-1107

Language

English

Publication classification

C Journal article, C1.1 Refereed article in a scholarly journal

Copyright notice

2017, Elsevier

Publisher

ELSEVIER SCIENCE INC