Arid
DOI10.1111/mec.12289
Functional genomic and phenotypic responses to desiccation in natural populations of a desert drosophilid
Rajpurohit, Subhash1; Oliveira, C. Assia C.2; Etges, William J.2; Gibbs, Allen G.1
通讯作者Gibbs, Allen G.
来源期刊MOLECULAR ECOLOGY
ISSN0962-1083
EISSN1365-294X
出版年2013
卷号22期号:10页码:2698-2715
英文摘要

We used whole-transcriptome microarrays to assess changes in gene expression and monitored mortality rates and epicuticular hydrocarbons (CHCs) in response to desiccation stress in four natural populations of Drosophila mojavensis from Baja California and mainland Mexico. Desiccation had the greatest effect on gene expression, followed by biogeographical variation at regional and population levels. Genes involved in environmental sensing and cuticular structure were up-regulated in dry conditions, while genes involved in transcription itself were down-regulated. Flies from Baja California had higher expression of reproductive and mitochondrial genes, suggesting that these populations have greater fecundity and higher metabolic rates. Host plant differences had a surprisingly minor effect on the transcriptome. In most cases, desiccation-caused mortality was greater in flies reared on fermenting cactus tissues than that on laboratory media. Water content of adult females and males was significantly different and was lower in Baja California males. Different groups of CHCs simultaneously increased and decreased in amounts due to desiccation exposure of 9 and 18h and were population-specific and dependent on larval rearing substrates. Overall, we observed that changes in gene expression involved a coordinated response of behavioural, cuticular and metabolic genes. Together with differential expression of cuticular hydrocarbons, this study revealed some of the mechanisms that have allowed D.mojavensis to exploit its harsh desert conditions. Certainly, for D.mojavensis that uses different host plants, population-level understanding of responses to stressors associated with future climate change in desert regions must be evaluated across geographical and local ecological scales.


英文关键词cuticular hydrocarbons desert desiccation gene expression genome host plant microarray transcriptome
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000318180000008
WOS关键词EPICUTICULAR HYDROCARBON VARIATION ; CACTUS HOST SHIFTS ; CACTOPHILIC-DROSOPHILA ; PREMATING ISOLATION ; WATER-BALANCE ; SONORAN DESERT ; CUTICULAR HYDROCARBONS ; MOJAVENSIS CLUSTER ; COURTSHIP SONG ; MATE CHOICE
WOS类目Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
WOS研究方向Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/178924
作者单位1.Univ Nevada, Sch Life Sci, Las Vegas, NV 89119 USA;
2.Univ Arkansas, Dept Biol Sci, Program Ecol & Evolutionary Biol, Fayetteville, AR 72701 USA
推荐引用方式
GB/T 7714
Rajpurohit, Subhash,Oliveira, C. Assia C.,Etges, William J.,et al. Functional genomic and phenotypic responses to desiccation in natural populations of a desert drosophilid[J],2013,22(10):2698-2715.
APA Rajpurohit, Subhash,Oliveira, C. Assia C.,Etges, William J.,&Gibbs, Allen G..(2013).Functional genomic and phenotypic responses to desiccation in natural populations of a desert drosophilid.MOLECULAR ECOLOGY,22(10),2698-2715.
MLA Rajpurohit, Subhash,et al."Functional genomic and phenotypic responses to desiccation in natural populations of a desert drosophilid".MOLECULAR ECOLOGY 22.10(2013):2698-2715.
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