[Supplementary Material] Estimating Bacterial Diversity in Scirtothrips dorsalis (Thysanoptera: Thripidae) Via Next Generation Sequencing

2014 
Summarized from a presentation and discussions at the “Thrips: small players with big damage” Symposium at the Annual Meeting of the Florida Entomological Society, 16 July 2013, Naples, Florida. The last 2 decades have produced a better understanding of insect-microbial associations and yielded some important opportunities for insect control. However, most of our knowledge comes from model systems. Thrips (Thysanoptera: Thripidae) have been understudied despite their global importance as invasive species, plant pests and disease vectors. Using a culture and primer independent next-generation sequencing and metagenomics pipeline, we surveyed the bacteria of the globally important pest, Scirtothrips dorsalis Hood. The most abundant bacterial phyla identified were Actinobacteria and Proteobacteria and the most abundant genera were Propionibacterium, Stenotrophomonas, and Pseudomonas . A total of 189 genera of bacteria were identified. The absence of any vertically transferred symbiont taxa commonly found in insects is consistent with other studies suggesting that thrips primarilly acquire resident microbes from their environment. This does not preclude a possible beneficial/intimate association between S. dorsalis and the dominant taxa identified and future work should determine the nature of these associations. Durante las ultimas dos decadas se ha alcanzado una mejor comprension acerca de la asociacion insecto-microbio, lo cual ha entregado importantes oportunidades para el control de insectos. Sin embargo, la mayor parte de nuestro conocimiento proviene de sistemas modelo, en que los Trips (Thysanoptera: Thripidae) no han sido estudiados en profundidad, a pesar de su importancia como especie invasiva, plaga de plantas y vector de enfermedades. Utilizando metodos de sequenciacion de ultima generacion sin necesidad de primers o cultivos, asi como metagenomica, hemos sondeado la bacteria Scirtothrips dorsalis Hood, una plaga de importancia mundial. Las phyla bacteriales mas abundantes identificadas fueron Actinobacteria and Proteobacteria, mientras que los generos fueron Propionibacterium , Stenotrophomonas y Pseudomonas . Un total de 189 generos de bacteria fueron identificados. La ausencia de cualquier tipo de taxa simbionte transferida verticalmente, como aquella encontrada frecuentemente en insectos, es consistente con otros estudios que sugieren que los microbios residentes en trips provienen principalmente del medio ambiente. Esto no excluye una posible asociacion intima/beneficiaria entre S. dorsalis y la taxa domimante identificada. La naturaleza de estas asociaciones debera ser determinada en futuros estudios.
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