Density-dependent induction and suppression of soldier differentiation in an aphid social system
Density-dependent induction and suppression of soldier differentiation in an aphid social system
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DOI：
10.1016/j.jinsphys.2004.08.004
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发表时间：
2004-11-01
影响因子：
2.2
通讯作者：
Fukatsu, T
中科院分区：
文献类型：
--
作者：
Shibao, H;Kutsukake, M;Fukatsu, T
我们研究了在二龄有不育的士兵种姓的社会蚜虫Tuberaphim Styraci的群体中控制士兵生产的机制。较高的棉铃虫密度可以诱导棉铃虫的产兵。对自然种群的分析表明，随着麦长管蚜密度的增加，兵员比例呈增加趋势，但达到一个平台期。人工饮食实验发现，在高密度条件下，士兵比例也处于类似的平台期。为了深入了解士兵生产的控制机制，利用人工饲料系统研究了士兵对成虫繁殖的影响。实验证明，士兵生产受到共存士兵的抑制，而非士兵共存则促进了士兵生产。这些结果表明，Styraci种群的种级比是由密度依赖的诱导和抑制士兵分化的正反馈和负反馈控制的。(C)2004爱思唯尔有限公司。保留所有权利。
We investigated the mechanism underlying the control of soldier production in colonies of a social aphid, Tuberaphis styraci, which has a sterile soldier caste in the second instar. High aphid density was shown to induce soldier production in T. styraci. Analysis of natural colonies revealed that the soldier proportion tended to increase with aphid density but reached a plateau. Artificial diet experiments identified a similar plateau of soldier proportion under high-density conditions. In order to gain insights into the controlling mechanism of soldier production, the effect of soldiers on reproducing adult aphids was examined using the artificial diet system. It was experimentally demonstrated that soldier production was suppressed by coexisting soldiers, whereas coexisting non-soldiers facilitated soldier production. These results suggested that caste ratio in the colony of T. styraci is controlled by positive and negative feedbacks consisting of density-dependent induction and suppression of soldier differentiation. (C) 2004 Elsevier Ltd. All rights reserved.