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Ph.D. Candidate Bing Xiaoli Discovered a New Symbiont of the WhiteflyPh.D. Candidate Bing Xiaoli Dis

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The newest issue of Applied and Environmental Microbiology, journal of American Society for Microbiology, published a paper authored by Ph.D. candidate Bing Xiaoli of Institute of Insect Sciences. The paper is entitled “Characterization of a Newly Discovered Symbiont of the Whitefly Bemisia tabaci (Hemiptera: Aleyrodidae).” The picture of symbiotic bacteria was published on the cover.
 
Biological studies have suggested that symbiotic bacteria are prevalent in organisms and influencing and regulating organisms’ life activities and survival states. The number of bacterial cells in human body is ten times of human cells. Human digestion, growth, self-defense and other basic physiological activities are all completed with the aid of these bacteria.
 
The roles of symbiotic bacteria in insects are gaining attention in science circles in recent years. Bing Xiaoli and his colleagues are mainly working on the symbiotic bacteria of the world’s major agricultural pest whitefly. With the body length of only 1 mm, a whitefly is the host to small symbiotic bacteria with complex variety currently not to be cultured in vitro. The symbiotic bacteria recorded in whiteflies are of 7 kinds, mostly found first in other organisms and later in whiteflies.
 
Bing Xiaoli and his colleagues did much field work, molecular detection and phylogenetic analysis and discovered a new symbiont of whiteflies “Candidatus Hemipteriphilus asiaticus”. Based on statistics, they inferred that the symbiont is prevalent in a variety of Hemiptera insects in Asia. This is the first time that Chinese entomologists have reported a new symbiont in Hemiptera insects. Their study shows that this symbiont exists together with other bacteria in whiteflies, and suggests that bacteria have close interactions and together impact and regulate the life activities of host insects. This provides a new perspective to the functions and mysteries of symbionts in whiteflies.

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