An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae).

Melanism is a common polymorphism in many insect species that also influences immune function. According to the thermal melanin hypothesis, ectothermic individuals from cooler environments have darker cuticles and higher polyphenol oxidase (PO) levels, which represent a better immunocompetence. In t...

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Main Authors:	Haichen Yin, Muhammad Shakeel, Jing Kuang, Jianhong Li
Format:	Article
Language:	English
Published:	Public Library of Science (PLoS) 2015-01-01
Series:	PLoS ONE
Online Access:	http://europepmc.org/articles/PMC4449008?pdf=render

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spelling	doaj-aeeb77f2af854a6e86534a550c893e082020-11-24T21:23:42ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-01105e012885910.1371/journal.pone.0128859An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae).Haichen YinMuhammad ShakeelJing KuangJianhong LiMelanism is a common polymorphism in many insect species that also influences immune function. According to the thermal melanin hypothesis, ectothermic individuals from cooler environments have darker cuticles and higher polyphenol oxidase (PO) levels, which represent a better immunocompetence. In this study, the links among environmental temperature, melanism, and PO activity of Saccharosydne procerus (Matsumura) were examined. Most S. procerus have a black spot on their forewings at high temperatures in the field and in the laboratory. In PO activity assay, a positive association between PO level and temperature was found. Our results showed that a diversification of melanism occurred under different temperatures and that melanism in S. procerus presented an opposite pattern to the one proposed by the thermal hypothesis.http://europepmc.org/articles/PMC4449008?pdf=render
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Haichen Yin Muhammad Shakeel Jing Kuang Jianhong Li
spellingShingle	Haichen Yin Muhammad Shakeel Jing Kuang Jianhong Li An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae). PLoS ONE
author_facet	Haichen Yin Muhammad Shakeel Jing Kuang Jianhong Li
author_sort	Haichen Yin
title	An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae).
title_short	An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae).
title_full	An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae).
title_fullStr	An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae).
title_full_unstemmed	An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae).
title_sort	opposite pattern to the conventional thermal hypothesis: temperature-dependent variation in coloration of adults of saccharosydne procerus (homoptera: delphacidae).
publisher	Public Library of Science (PLoS)
series	PLoS ONE
issn	1932-6203
publishDate	2015-01-01
description	Melanism is a common polymorphism in many insect species that also influences immune function. According to the thermal melanin hypothesis, ectothermic individuals from cooler environments have darker cuticles and higher polyphenol oxidase (PO) levels, which represent a better immunocompetence. In this study, the links among environmental temperature, melanism, and PO activity of Saccharosydne procerus (Matsumura) were examined. Most S. procerus have a black spot on their forewings at high temperatures in the field and in the laboratory. In PO activity assay, a positive association between PO level and temperature was found. Our results showed that a diversification of melanism occurred under different temperatures and that melanism in S. procerus presented an opposite pattern to the one proposed by the thermal hypothesis.
url	http://europepmc.org/articles/PMC4449008?pdf=render
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An Opposite Pattern to the Conventional Thermal Hypothesis: Temperature-Dependent Variation in Coloration of Adults of Saccharosydne procerus (Homoptera: Delphacidae).

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