TY - JOUR
T1 - Juvenile hormone titer and wing-morph differentiation in the vetch aphid Megoura crassicauda
AU - Ishikawa, Asano
AU - Gotoh, Hiroki
AU - Abe, Taisuke
AU - Miura, Toru
N1 - Funding Information:
We are grateful to S. Koshikawa and R. Cornette for their valuable comments on the study and assistance in various experiments. We also express our great appreciation to Y. Okumura, Y. Nakagawa, and K. Ogawa for their assistance with maintaining aphid stocks. This work was partly supported by Grants-in-Aid for Young Scientists (No. 21677001 ) from the Ministry of Education, Culture, Sports, Science and Technology of Japan .
PY - 2013/4
Y1 - 2013/4
N2 - Most aphids exhibit wing polyphenism, in which winged and wingless females are produced depending on aphid densities. Although juvenile hormone (JH) has been implicated in the regulation of aphid wing polyphenism, relatively few studies examining the direct relationship between JH titer and resultant wing morphs have been undertaken. We therefore investigated the relationship between JH III titer and the development of wing morphs in the vetch aphid Megoura crassicauda during postembryonic development. JH III measurements by liquid chromatography-mass spectrometry (LC-MS) revealed that, at the third instar, presumptive wingless nymphs had significantly higher JH III titers than winged nymphs. In winged nymphs at the third instar, JH III application inhibited wing development resulting in the appearance of winged/wingless intermediates as well as juvenilized individuals with supernumerary molting. These results suggest that JH III plays an important role in wing-morph differentiation during postembryonic development.
AB - Most aphids exhibit wing polyphenism, in which winged and wingless females are produced depending on aphid densities. Although juvenile hormone (JH) has been implicated in the regulation of aphid wing polyphenism, relatively few studies examining the direct relationship between JH titer and resultant wing morphs have been undertaken. We therefore investigated the relationship between JH III titer and the development of wing morphs in the vetch aphid Megoura crassicauda during postembryonic development. JH III measurements by liquid chromatography-mass spectrometry (LC-MS) revealed that, at the third instar, presumptive wingless nymphs had significantly higher JH III titers than winged nymphs. In winged nymphs at the third instar, JH III application inhibited wing development resulting in the appearance of winged/wingless intermediates as well as juvenilized individuals with supernumerary molting. These results suggest that JH III plays an important role in wing-morph differentiation during postembryonic development.
KW - Flight-apparatus development
KW - Phenotypic plasticity
KW - Wing polyphenism
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U2 - 10.1016/j.jinsphys.2013.02.004
DO - 10.1016/j.jinsphys.2013.02.004
M3 - Article
C2 - 23434762
AN - SCOPUS:84875058031
VL - 59
SP - 444
EP - 449
JO - Journal of Insect Physiology
JF - Journal of Insect Physiology
SN - 0022-1910
IS - 4
ER -