TY - JOUR
T1 - Obligate gut symbiotic association in the sloe bug Dolycoris baccarum (Hemiptera
T2 - Pentatomidae)
AU - Itoh, Hideomi
AU - Matsuura, Yu
AU - Hosokawa, Takahiro
AU - Fukatsu, Takema
AU - Kikuchi, Yoshitomo
N1 - Funding Information:
We thank H. Toju, K. Takeshita, E. Hara, Y.G. Baba, S. Kudo, and M. Baba for insect samples, and N. Nakamura and M. Okamoto for technical assistance. This study was supported by the Japan Society for the Promotion of Science (JSPS), project 15H05638.
Publisher Copyright:
© 2016, The Japanese Society of Applied Entomology and Zoology.
PY - 2017/2/1
Y1 - 2017/2/1
N2 - A number of phytophagous stinkbugs are associated with specific bacterial symbionts in their alimentary tracts. The sloe bug Dolycoris baccarum (Linnaeus), a notorious pest of diverse crops, possesses a number of sac-like tissues, called crypts, in a posterior section of the midgut, wherein a specific bacterial symbiont colonizes. Here we characterized the symbiotic bacterium of D. baccarum by histological analysis, molecular phylogeny, and diagnostic PCR with a specific primer set. The cloning and sequencing analyses of bacterial 16S rRNA genes and fluorescent in situ hybridization demonstrated that the sloe bug is associated with a single species of Gammaproteobacteria in the midgut crypts. Molecular phylogenetic analysis strongly suggested that the symbiont should be placed in the genus Pantoea of the Enterobacteriaceae. Diagnostic PCR and egg surface sterilization with formalin indicated the stinkbug vertically transmits the Pantoea symbiont via egg-smearing. The sterilization-produced aposymbiotic nymphs showed high mortality and no insects reached adulthood. In addition, the Pantoea symbiont was uncultivable outside the insect host, indicating an obligate and intimate host-symbiont association.
AB - A number of phytophagous stinkbugs are associated with specific bacterial symbionts in their alimentary tracts. The sloe bug Dolycoris baccarum (Linnaeus), a notorious pest of diverse crops, possesses a number of sac-like tissues, called crypts, in a posterior section of the midgut, wherein a specific bacterial symbiont colonizes. Here we characterized the symbiotic bacterium of D. baccarum by histological analysis, molecular phylogeny, and diagnostic PCR with a specific primer set. The cloning and sequencing analyses of bacterial 16S rRNA genes and fluorescent in situ hybridization demonstrated that the sloe bug is associated with a single species of Gammaproteobacteria in the midgut crypts. Molecular phylogenetic analysis strongly suggested that the symbiont should be placed in the genus Pantoea of the Enterobacteriaceae. Diagnostic PCR and egg surface sterilization with formalin indicated the stinkbug vertically transmits the Pantoea symbiont via egg-smearing. The sterilization-produced aposymbiotic nymphs showed high mortality and no insects reached adulthood. In addition, the Pantoea symbiont was uncultivable outside the insect host, indicating an obligate and intimate host-symbiont association.
UR - http://www.scopus.com/inward/record.url?scp=85011596234&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85011596234&partnerID=8YFLogxK
U2 - 10.1007/s13355-016-0453-0
DO - 10.1007/s13355-016-0453-0
M3 - Article
AN - SCOPUS:85011596234
SN - 0003-6862
VL - 52
SP - 51
EP - 59
JO - Applied Entomology and Zoology
JF - Applied Entomology and Zoology
IS - 1
ER -