Article (Scientific journals)
Secondary symbionts affect aphid fitness and the titer of primary symbiont.
Liu, Shen; Liu, Xiaobei; Zhang, Tiantao et al.
2023In Frontiers in Plant Science, 14, p. 1096750
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Keywords :
Hamiltonella defensa; Regiella insecticola; Rhopalosiphum maidis; aphid fitness; symbiont titer; Plant Science
Abstract :
[en] Bacterial symbionts associated with aphids are important for their ecological fitness. The corn leaf aphid, Rhopalosiphum maidis (Fitch), is one of the most damaging aphid pests on maize and has been reported to harbor Hamiltonella defensa and Regiella insecticola while the effects of the secondary symbionts (S-symbionts) on host ecology and primary symbiont Buchnera aphidicola remain unclear. Here, four aphid strains were established, two of which were collected from Langfang - Hebei Province, China, with similar symbiont pattern except for the presence of H. defensa. Two other aphid strains were collected from Nanning - Guangxi Province, China, with the same symbiont infection except for the presence of R. insecticola. Phylogenetic analysis and aphid genotyping indicated that the S-symbiont-infected and free aphid strains from the same location had identical genetic backgrounds. Aphid fitness measurement showed that aphid strain infected with H. defensa performed shortened developmental duration for 1st instar and total nymph stages, reduced aphid survival rate, offspring, and longevity. While the developmental duration of H-infected strains was accelerated, and the adult weight was significantly higher compared to the H-free strain. Infection with R. insecticola did not affect the aphid's entire nymph stage duration and survival rate. As the H-strain does, aphids infected with R. insecticola also underwent a drop in offspring, along with marginally lower longevity. Unlike the H-infected strain, the R-infected strain performed delayed developmental duration and lower adult weight. The B. aphidicola titers of the H-infected strains showed a steep drop during the aphid 1st to 3rd instar stages, while the augmentation of B. aphidicola titers was found in the R-infected strain during the aphid 1st to 3rd instar. Our study investigated for the first time the effect of the S-symbionts on the ecology fitness and primary symbiont in R. maidis, indicating that infection with secondary symbionts leads to the modulation of aphid primary symbiont abundance, together inducing significant fitness costs on aphids with further impact on environmental adaptation and trophic interactions.
Disciplines :
Entomology & pest control
Author, co-author :
Liu, Shen ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech ; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
Liu, Xiaobei ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Form. doct. sc. agro. & ingé. biol. (paysage) ; State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
Zhang, Tiantao;  State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
Bai, Shuxiong;  State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
He, Kanglai;  State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
Zhang, Yongjun;  State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
Francis, Frédéric  ;  Université de Liège - ULiège > TERRA Research Centre > Gestion durable des bio-agresseurs
Wang, Zhenying;  State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
Language :
English
Title :
Secondary symbionts affect aphid fitness and the titer of primary symbiont.
Publication date :
27 January 2023
Journal title :
Frontiers in Plant Science
eISSN :
1664-462X
Publisher :
Frontiers Media S.A., Switzerland
Volume :
14
Pages :
1096750
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
SL, FF, and ZW conceptualized the study. TZ, SB, KH, and YZ assisted in the experimental methods. SL performed the experiment, XL assisted in the experiment of aphid fitness measurement. SL wrote the manuscript. FF and ZW reviewed and amended the manuscript. ZW provided financial support. All authors contributed to the article and approved the submitted version.
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since 30 January 2025

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