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Rhythms in Foraging Behavior and Expression Patterns of the Foraging Gene in Solenopsis invicta (Hymenoptera: Formicidae) in relation to Photoperiod

文献类型： 外文期刊

作者： Lei, Yanyuan 1 ; Zhou, Yangyang 2 ; Lu, Lihua 1 ; He, Yurong 2 ;

作者机构： 1.Guangdong Acad Agr Sci, Plant Protect Res Inst, 7 Jinying Rd, Guangzhou 510640, Guangdong, Peoples R China

2.South China Agr Univ, Coll Agr, 483 Wushan Rd, Guangzhou 510642, Guangdong, Peoples R China

关键词： red imported fire ant; foraging gene; forager; rhythms in foraging behavior; photoperiod

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）

ISSN： 0022-0493

年卷期： 2019 年 112 卷 6 期

页码：

收录情况： SCI

摘要： The foraging gene (for) is associated with foraging and other associated behaviors in social insect species. Photoperiod is known to entrain the rhythmic biological functions of ants; however, how photoperiod might influence the intensity and duration of foraging, and the expression of for, remains unexplored. This study determined the correlation between rhythm in foraging behavior and expression of the foraging gene (Sifor) mRNA in red imported fire ant, Solenopsis invicta Buren. Foragers were exposed to three photoperiod conditions (12:12 [L:D], 24:0 [L:D], and 0:24 [L:D]) in the laboratory and foraging activities were recorded using a video-computer recording system. Sifor expression in the foragers was tested using real-time reverse-transcription quantitative PCR. Results revealed that foraging activity rhythm and Sifor expression profile were unimodal under all three photoperiod conditions. Levels of foraging activity were associated with photoperiodic modification, a stable phase difference between the onset of activity and the onset of gene expression was discovered. Light-dark transients stimulated foraging activity in 12:12 (L:D). There were significant daily oscillations (amplitude of 0.21 +/- 0.08 for 12:12 [L:D], 0.12 +/- 0.02 for 24:0 [L:D], and 0.09 +/- 0.01 for 0:24 [L:D]) in the expression of Sifor. A positive relationship (r = 0.5903, P < 0.01) was found between the expression level of Sifor and foraging activity, which indicated that Sifor is linked to some extent to foraging behavior. Our results demonstrated that foragers could adjust the rhythms in foraging behavior according to light-dark cycle and suggested that Sifor may play an important role in the response of S. invicta to photoperiod.

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