Senescence in the worker honey bee Apis Mellifera.
Senescence in the worker honey bee Apis Mellifera.
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DOI：
10.1016/j.jinsphys.2007.05.015
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发表时间：
2007-10
影响因子：
2.2
通讯作者：
Silvia C. Remolina;Daniel M Hafez;G. Robinson;K. Hughes
中科院分区：
文献类型：
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作者：
Silvia C. Remolina;Daniel M Hafez;G. Robinson;K. Hughes
蜜蜂是群居昆虫，在寿命方面表现出明显的种姓差异。蜂王的平均寿命为1-2年，而工蜂的寿命为夏季2-6周，冬季约为20周。目前尚不清楚蜂王寿命的差异是由于衰老速度的内在生理差异，还是由于暴露于外部因素（如捕食和不利的环境条件）的不同，还是两者兼而有之。为了确定工蜂相对较短的寿命是否与衰老有关，我们测量了工蜂对三种不同生理应激源（饥饿、热应激和氧化应激）的年龄特异性抵抗，同时消除了觅食活动中与年龄相关的差异，并将能量消耗中与年龄相关的差异降至最低。尽管有这些操作，年长的工蜂对所有三种压力源的抵抗力仍然明显低于年轻的工蜂。这些结果表明，工蜂寿命的调节除了外部因素外，还与衰老有关。
Honey bees are social insects that exhibit striking caste-specific differences in longevity. Queen honey bees live on average 1–2 years, whereas workers live 2–6 weeks in the summer and about 20 weeks in the winter. It is not clear whether queen–worker differences in longevity are due to intrinsic physiological differences in the rate of senescence, to differential exposure to extrinsic factors such as predation and adverse environmental conditions, or both. To determine if the relatively short lifespan of worker bees involves senescence, we measured age-specific resistance to three different physiological stressors (starvation, thermal, and oxidative stress) while eliminating age-related differences in foraging activity and minimizing age-related differences in energy expenditure. Despite these manipulations, older worker bees were still significantly less resistant to all three stressors than were younger bees. These results indicate that the regulation of worker bee lifespan involves senescence, in addition to extrinsic factors.