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Open Access Publications from the University of California

SEM- and TEM-informed anatomical observations of Ca. Liberibacter solanacearum (Lso) parasite localization in its psyllid host


With SEM, we studied external midgut surfaces of all potato psyllid instars, and, additionally with SEM and TEM, the anterior alimentary system of adults. The ontogenetically earliest point of Lso detection was in the 3rd instar, then in consecutively greater percentages of 4th and 5th instars, then in a lower percentage of teneral and mature adults. Two age-based patterns of proliferation were identified in the oral region of mature adults- streaming, in which Lso were confined to passageways, and diffuse, in which Lso occurred inside of, and around, cells of mouthpart components, muscles and epidermis.

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