A comparison of low temperature tolerance traits between closely related aphids from the tropics, temperate zone, and Arctic
A comparison of low temperature tolerance traits between closely related aphids from the tropics, temperate zone, and Arctic
复制标题
DOI：
10.1016/j.jinsphys.2009.08.020
复制
发表时间：
2010-02-01
影响因子：
2.2
通讯作者：
Bale, Jeffrey S.
中科院分区：
文献类型：
--
作者：
Hazell, Steaphan P.;Groutides, Constantinos;Bale, Jeffrey S.
暴露在低温下的蚜虫的生存很大程度上受到它们在植物内部和植物之间移动以及在潜在致命低温下生存的能力的影响。人们对低温下蚜虫运动的生理和行为限制或它们与致死温度阈值的关系知之甚少。这些问题通过对三种密切相关的蚜虫物种的热生态学的分析来解决：桃蚜（一种普遍存在的温带害虫）、北极蚜虫（一种北极物种）和蚜虫（一种亚热带物种）。在 15 摄氏度下饲养的蚜虫的较低致死温度 (LLT50) 与 M. persicae 和 M. Polaris 相似（范围：-12.7 至 -13.9 摄氏度），但 M. ornatus 明显更高（-6.6 摄氏度）。所有克隆的活动和冷昏迷的温度阈值随着饲养温度（10、15、20 和 25 摄氏度）的增加而增加。对于 M. Polaris 和 M. ornatus，这些关系的斜率近似平行；相比之下，对于桃蚜来说，斜率的差异意味着饲养温度每增加 1 摄氏度，蚜虫停止行走和进入昏迷的温度之间的差异就会增加约 0.5 摄氏度。数据表明，如果放宽低温限制，这三个物种都有可能增加种群规模并扩大其活动范围。 (C) 2009 Elsevier Ltd. 保留所有权利
The survival of aphids exposed to low temperatures is strongly influenced by their ability to move within and between plants and to survive exposure to potentially lethal low temperatures. Little is known about the physiological and behavioural limitations on aphid movement at low temperatures or how they may relate to lethal temperature thresholds. These questions are addressed here through an analysis of the thermal ecology of three closely related aphid species: Myzus persicae, a ubiquitous temperate zone pest, Myzus polaris, an arctic species, and Myzus ornatus, a sub-tropical species. Lower lethal temperatures (LLT50) of aphids reared at 15 degrees C were similar for M. persicae and M. Polaris (range: -12.7 to -13.9 degrees C), but significantly higher for M. ornatus (-6.6 degrees C). The temperature thresholds for activity and chill coma increased with rearing temperature (10, 15, 20, and 25 degrees C) for all clones. For M. Polaris and M. ornatus the slopes of these relationships were approximately parallel; by contrast, for M. persicae the difference in slopes meant that the difference between the temperatures at which aphids cease walking and enter coma increased by approximately 0.5 degrees C per 1 degrees C increase in rearing temperature. The data suggest that all three species have the potential to increase population sizes and expand their ranges if low temperature limitation is relaxed. (C) 2009 Elsevier Ltd. All rights reserved