Strategies used by two apterous strains of the pea aphid Acyrthosiphon pisum for passive dispersal

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Abstract

Wingless forms of aphids are relatively sedentary, and have a limited ability to migrate or disperse. However, they can drop off hosts or walk away if disturbed, or their food quality or quantity become deteriorated. Earlier, we found that the pea aphid, Acyrthosiphon pisum (Harris, 1776), could use differed strategies to escape danger and locate new host plants. To determine the mechanisms behind the different strategies, we undertook a series of studies including the aphids' host location, energy reserves under starvation, glycogenesis, sugar assimilation, olfactory and probing behaviors. We found that in our controlled laboratory conditions, one strain (local laboratory strain) moved longer distances and dispersed wider ranges, and correspondingly these aphids assimilated more sugars, synthesized more glycogen, and moved faster than another strain (collected from Gansu Province, northwestern China). However, the latter strain could locate the host faster, probed leaves more frequently, and identified plant leaves more accurately than the former strain after they were starved. Our results explained how flightless or wingless insects adapt to fit biotic and abiotic challenges in the complex processes of natural selection.

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APA

Zhang, Y., Wang, X. X., Zhu, J. Y., Zhang, Z. F., Tian, H. G., & Liu, T. X. (2016). Strategies used by two apterous strains of the pea aphid Acyrthosiphon pisum for passive dispersal. Biology Open, 5(10), 1535–1544. https://doi.org/10.1242/bio.018903

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