1. 科學新知
Speaker:吳如蕙
Date:11/26/2010

3. Science 2010 Nov 19.

4. 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)

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

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

7. 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

8. 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

9. Thanks for your attention