Abstract
AbstractThe birch blister aphid Hamamelistes betulinus, like most aphids, is host to obligate symbiotic bacterium Buchnera aphidicola. Ultrastructural and molecular analyses did not reveal the presence of secondary symbionts in the body of H. betulinus. The bacteria Buchnera aphidicola are transmitted to the next generation vertically (maternally). The bacteria released from the cytoplasm of the bacteriocyte to the haemolymph migrate to the embryo at the cellular blastoderm stage, through the opening at its posterior pole. Next, the bacteria enter the cytoplasm of newly formed bacteriocytes. The concept of the relationship between the geographic distribution of Hormaphidini aphids and the presence/absence of bacterium Buchnera aphidicola is discussed.
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