scholarly journals Defense of pyrethrum flowers: repelling herbivores and recruiting carnivores by producing aphid alarm pheromone

2019 ◽  
Vol 223 (3) ◽  
pp. 1607-1620 ◽  
Author(s):  
Jinjin Li ◽  
Hao Hu ◽  
Jing Mao ◽  
Lu Yu ◽  
Geert Stoopen ◽  
...  
Keyword(s):  
Alarm Pheromone ◽  
Aphid Alarm Pheromone

Production of alarm pheromone starts at embryo stage and is modulated by rearing conditions and farnesyl diphosphate synthase genes in the bird cherry-oat aphid Rhopalosiphum padi

2019 ◽  
Vol 109 (6) ◽  
pp. 821-830 ◽  
Author(s):  
C.-X. Sun ◽  
Z.-X. Li
Keyword(s):  
Alarm Pheromone ◽  
Quantitative Polymerase Chain Reaction ◽  
Rhopalosiphum Padi ◽  
Farnesyl Diphosphate ◽  
Farnesyl Diphosphate Synthase ◽  
Nymphal Stage ◽  
Rearing Conditions ◽  
Old Adult ◽  
Embryo Stage ◽  
Aphid Alarm Pheromone

AbstractThe major component of aphid alarm pheromone is (E)-β-farnesene (EβF), but the molecular mechanisms of EβF synthesis are poorly understood. Here we established a biological model to study the modulation of EβF synthesis in the bird cherry-oat aphid Rhopalosiphum padi by using quantitative polymerase chain reaction, gas chromatography/mass spectrometry and RNA interference. Our results showed that the rearing conditions significantly affected the weight of adult and modulated EβF synthesis in a transgenerational manner. Specifically, the quantity of EβF per milligram of aphid was significantly reduced in the individually reared adult or 1st-instar nymphs derived from 1-day-old adult reared individually, but EβF in the nymph derived from 2-day-old adult that experienced collective conditions returned to normal. Further study revealed that the production of EβF started in embryo and was extended to early nymphal stage, which was modulated by farnesyl diphosphate synthase genes (RpFPPS1 and RpFPPS2) and rearing conditions. Knockdown of RpFPPS1 and RpFPPS2 confirmed the role played by FPPS in the biosynthesis of aphid alarm pheromone. Our results suggested that the production of EβF starts at the embryo stage and is modulated by FPPS and rearing conditions in R. padi, which sheds lights on the modulatory mechanisms of EβF in the aphid.

scholarly journals Aphid alarm pheromone produced by transgenic plants affects aphid and parasitoid behavior

2006 ◽  
Vol 103 (27) ◽  
pp. 10509-10513 ◽  
Author(s):  
M. H. Beale ◽  
M. A. Birkett ◽  
T. J. A. Bruce ◽  
K. Chamberlain ◽  
L. M. Field ◽  
...  
Keyword(s):  
Transgenic Plants ◽  
Alarm Pheromone ◽  
Parasitoid Behavior ◽  
Aphid Alarm Pheromone

Structure-activity relationships of analogs of the aphid alarm pheromone, (E)-β-farnesene

1977 ◽  
Vol 23 (6) ◽  
pp. 697-701 ◽  
Author(s):  
William S. Bowers ◽  
Chikao Nishino ◽  
Michael E. Montgomery ◽  
Lowell R. Nault
Keyword(s):  
Alarm Pheromone ◽  
Structure Activity Relationships ◽  
Structure Activity ◽  
Aphid Alarm Pheromone

Ant-aphid association: role of aphid alarm pheromone

Science ◽  
1976 ◽  
Vol 192 (4246) ◽  
pp. 1349-1351 ◽  
Author(s):  
L. Nault ◽  
M. Montgomery ◽  
W. Bowers
Keyword(s):  
Alarm Pheromone ◽  
Aphid Alarm Pheromone

scholarly journals Aphid alarm pheromone mimics: sesquiterpene hydrocarbons.

1976 ◽  
Vol 40 (11) ◽  
pp. 2303-2304 ◽  
Author(s):  
Chikao NISHINO ◽  
William S. BOWERS ◽  
Michael E. MONTGOMERY ◽  
Lowell R. NAULT
Keyword(s):  
Alarm Pheromone ◽  
Sesquiterpene Hydrocarbons ◽  
Pheromone Mimics ◽  
Aphid Alarm Pheromone
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