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| DOI | 10.1002/jez.2780 |
| Cold-induced skin darkening does not protect amphibian larvae from UV-associated DNA damage | |
| 发表日期 | 2024 |
| ISSN | 2471-5638 |
| EISSN | 2471-5646 |
| 起始页码 | 341 |
| 结束页码 | 3 |
| 卷号 | 341期号:3 |
| 英文摘要 | Amphibian declines are sometimes correlated with increasing levels of ultraviolet radiation (UVR). While disease is often implicated in declines, environmental factors such as temperature and UVR play an important role in disease epidemiology. The mutagenic effects of UVR exposure on amphibians are worse at low temperatures. Amphibians from cold environments may be more susceptible to increasing UVR. However, larvae of some species demonstrate cold acclimation, reducing UV-induced DNA damage at low temperatures. Understanding of the mechanisms underpinning this response is lacking. We reared Limnodynastes peronii larvae in cool (15 degrees C) or warm (25 degrees C) waters before acutely exposing them to 1.5 h of high intensity (80 mu W cm-2) UVBR. We measured the color of larvae and mRNA levels of a DNA repair enzyme. We reared larvae at 25 degrees C in black or white containers to elicit a skin color response, and then measured DNA damage levels in the skin and remaining carcass following UVBR exposure. Cold-acclimated larvae were darker and displayed lower levels of DNA damage than warm-acclimated larvae. There was no difference in CPD-photolyase mRNA levels between cold- and warm-acclimated larvae. Skin darkening in larvae did not reduce their accumulation of DNA damage following UVR exposure. Our results showed that skin darkening does not explain cold-induced reductions in UV-associated DNA damage in L. peronii larvae. Beneficial cold-acclimation is more likely underpinned by increased CPD-photolyase abundance and/or increased photolyase activity at low temperatures. image Cold temperatures darken Limnodynastes peronii larvae.Darker larvae were not protected from UV-induced DNA damage.Improved resilience to DNA damage following UV exposure in cold-acclimated larvae is likely driven by acclimation of DNA repair enzymes. |
| 英文关键词 | amphibian declines; DNA repair; ecophysiology; melanin; photolyase; plasticity; temperature |
| 语种 | 英语 |
| WOS研究方向 | Zoology |
| WOS类目 | Zoology |
| WOS记录号 | WOS:001139126700001 |
| 来源期刊 | JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/302339 |
| 作者单位 | University of Queensland; University of Edinburgh; University of Queensland |
| 推荐引用方式 GB/T 7714 | . Cold-induced skin darkening does not protect amphibian larvae from UV-associated DNA damage[J],2024,341(3). |
| APA | (2024).Cold-induced skin darkening does not protect amphibian larvae from UV-associated DNA damage.JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY,341(3). |
| MLA | "Cold-induced skin darkening does not protect amphibian larvae from UV-associated DNA damage".JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY 341.3(2024). |
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