Cargando…
The effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species Bombus impatiens
In the face of insect declines, identifying phases of the life cycle when insects are particularly vulnerable to mortality is critical to conservation efforts. For numerous annual insect groups, diapause is both a key adaptation that allows survival of inhospitable conditions and a physiologically d...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7720083/ https://www.ncbi.nlm.nih.gov/pubmed/33304588 http://dx.doi.org/10.1093/conphys/coaa103 |
_version_ | 1783619796212908032 |
---|---|
author | Treanore, Erin Amsalem, Etya |
author_facet | Treanore, Erin Amsalem, Etya |
author_sort | Treanore, Erin |
collection | PubMed |
description | In the face of insect declines, identifying phases of the life cycle when insects are particularly vulnerable to mortality is critical to conservation efforts. For numerous annual insect groups, diapause is both a key adaptation that allows survival of inhospitable conditions and a physiologically demanding life stage that can result in high rates of mortality. As bees continue to garner attention as a group experiencing high rates of decline, improving our understanding of how annual bees prepare for diapause and identifying factors that reduce survival is imperative. Here, we studied factors affecting diapause survival length and their underlying mechanisms using an economically and ecologically important annual bee species, Bombus impatiens. We examined how age and mass upon diapause onset correlate with diapause survival length, and the mechanistic role of nutrient acquisition and oxidative stress post pupal eclosion in mediating these effects. Our findings show that both age and mass were strong predictors of diapause survival length. Heavier queens or queens in the age range of ~6–17 days survived longer in diapause. Mass gain was attributed to increases in lipid, protein and glycerol amounts following pupal eclosion, and the ability to deal with oxidative stress was significantly compromised in older pre-diapause queens. Our results demonstrate that age-related shifts in bee physiology and timing of nutrient acquisition may both be critical factors driving diapause survival. |
format | Online Article Text |
id | pubmed-7720083 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-77200832020-12-09 The effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species Bombus impatiens Treanore, Erin Amsalem, Etya Conserv Physiol Research Article In the face of insect declines, identifying phases of the life cycle when insects are particularly vulnerable to mortality is critical to conservation efforts. For numerous annual insect groups, diapause is both a key adaptation that allows survival of inhospitable conditions and a physiologically demanding life stage that can result in high rates of mortality. As bees continue to garner attention as a group experiencing high rates of decline, improving our understanding of how annual bees prepare for diapause and identifying factors that reduce survival is imperative. Here, we studied factors affecting diapause survival length and their underlying mechanisms using an economically and ecologically important annual bee species, Bombus impatiens. We examined how age and mass upon diapause onset correlate with diapause survival length, and the mechanistic role of nutrient acquisition and oxidative stress post pupal eclosion in mediating these effects. Our findings show that both age and mass were strong predictors of diapause survival length. Heavier queens or queens in the age range of ~6–17 days survived longer in diapause. Mass gain was attributed to increases in lipid, protein and glycerol amounts following pupal eclosion, and the ability to deal with oxidative stress was significantly compromised in older pre-diapause queens. Our results demonstrate that age-related shifts in bee physiology and timing of nutrient acquisition may both be critical factors driving diapause survival. Oxford University Press 2020-12-04 /pmc/articles/PMC7720083/ /pubmed/33304588 http://dx.doi.org/10.1093/conphys/coaa103 Text en The Author(s) 2020. Published by Oxford University Press and the Society for Experimental Biology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Treanore, Erin Amsalem, Etya The effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species Bombus impatiens |
title | The effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species Bombus impatiens |
title_full | The effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species Bombus impatiens |
title_fullStr | The effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species Bombus impatiens |
title_full_unstemmed | The effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species Bombus impatiens |
title_short | The effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species Bombus impatiens |
title_sort | effect of intrinsic physiological traits on diapause survival and their underlying mechanisms in an annual bee species bombus impatiens |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7720083/ https://www.ncbi.nlm.nih.gov/pubmed/33304588 http://dx.doi.org/10.1093/conphys/coaa103 |
work_keys_str_mv | AT treanoreerin theeffectofintrinsicphysiologicaltraitsondiapausesurvivalandtheirunderlyingmechanismsinanannualbeespeciesbombusimpatiens AT amsalemetya theeffectofintrinsicphysiologicaltraitsondiapausesurvivalandtheirunderlyingmechanismsinanannualbeespeciesbombusimpatiens AT treanoreerin effectofintrinsicphysiologicaltraitsondiapausesurvivalandtheirunderlyingmechanismsinanannualbeespeciesbombusimpatiens AT amsalemetya effectofintrinsicphysiologicaltraitsondiapausesurvivalandtheirunderlyingmechanismsinanannualbeespeciesbombusimpatiens |