Coinfection of the secondary symbionts,Hamiltonella defensaandArsenophonussp. contribute to the performance of the major aphid pest,Aphis gossypii(Hemiptera: Aphididae)

Insect Science - Tập 27 Số 1 - Trang 86-98 - 2020
Aida Ayoubi1, Ali Asghar Talebi1, Yaghoub Fathipour1, Mohammad Mehrabadi1
1Faculty of Agriculture, Department of Entomology, Tarbiat Modares University, Tehran, Iran

Tóm tắt

Abstract

Bacterial endosymbionts play important roles in ecological traits of aphids. In this study, we characterize the bacterial endosymbionts ofA. gossypiicollected in Karaj, Iran and their role in the performance of the aphid. Our results indicated that besideBuchnera aphidicola,A. gossypii, also harbors bothHamiltonella defensaandArsenophonussp. Quantitative PCR (qPCR) results revealed that the populations of the endosymbionts increased throughout nymphal development up to adult emergence; thereafter, populations ofBuchneraandArsenophonuswere diminished while the density ofH. defensaconstantly increased.Buchnerareduction caused prolonged development and no progeny production. Furthermore, secondary symbiont reduction led to reduction of the total life span and intrinsic rate of natural increase as well as appearance of the deformed dead offspring in comparison with the control insects. Reduction of the secondary symbionts did not affect parasitism rate of the aphid by the parasitic waspAphidius matricariae. Together these findings showed thatH. defensaandArsenophonuscontributed to the fitness ofA. gossypiiby enhancing its performance, but not through parasitoid resistance.

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Insect Science

Tập 27 Số 1

86-98

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