科學新知 Speaker:吳如蕙 Date:11/26/2010

Science 2010 Nov 19.

Pea aphids, Acyrthosiphon pisum The most destructive insect pests Relying on intracellular bacteria for survival & development Ladybird beetles  red Parasitoid wasps  green 蚜蟲會吸取植物的汁液、傳播農作物的病毒，號稱是「植物的蚊子」 Aphids are among the most destructive insect pests on cultivated plants in temperate regions maintain color variation (gene controlled) http://en.wikipedia.org/wiki/Aphid

Certain green aphids red nymphs  green adults Hamiltonellaor or Serratia-like organism  against parasitoid wasps (Oliver et al., 2003)

Rickettsiella green color was positively correlated with the infection density of Rickettsiella

Two major groups of pigment molecules: (1) yellow-red colors no significant difference (2) blue-green colors infected ＞ uninfected increase green-pigment production 多不的對苯二酮 polycyclic quinones

New role of endosymbionts in aphids Previous studies tolerance to high temperature resistance against natural enemies This study modified the body color of hosts influence prey-predator interactions

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