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2017 ; 284
(1859
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Multi-functional roles of a soldier-specific volatile as a worker arrestant,
primer pheromone and an antimicrobial agent in a termite
#MMPMID28747483
Mitaka Y
; Mori N
; Matsuura K
Proc Biol Sci
2017[Jul]; 284
(1859
): ä PMID28747483
show ga
Division of labour in eusocial insects is characterized by efficient
communication systems based on pheromones. Among such insects, termites have
evolved specialized sterile defenders, called soldiers. Because they are
incapable of feeding themselves, it has been suggested that soldiers are
sustained by workers and emit the pheromone arresting workers. However, such a
soldier pheromone has not been identified in any termite species, and the details
of the soldier-worker interaction remain to be explored. Here, we identified a
soldier-specific volatile sesquiterpene as a worker arrestant, which also acts as
a primer pheromone regulating soldier differentiation and fungistatic agent in a
termite Reticulitermes speratus Chemical analyses revealed that (-)-?-elemene is
the major component of soldier extract, and its authentic standard exhibited
arrestant activity to workers and inhibited the differentiation from workers to
soldiers. This compound also showed fungistatic activity against entomopathogenic
fungi. These suggest that (-)-?-elemene secreted by soldiers acts not only as a
worker arrestant but also as one component of inhibitory primer pheromone and an
anti-pathogenic agent. Our study provides novel evidence supporting the
multi-functionality of termite soldier pheromone and provides new insights into
the role of soldiers and the evolutionary mechanisms of pheromone compounds.