Oogenese und Symbiontenübertragung bei Sogatodes orizicola Muir. (Homoptera: Delphacidae).

Abstract

Females of Sogatodes orizicola Muir. harbour yeast-like symbiotes (YLS), which are limited to syncytia of the fat body near the ovarioles. The ovarioles are of the meroistic-telotrophic type and need 2-3 days after hatching to produce the first ripe eggs. The infection of the symbiotes take place through the epithelial connection (epithelial plug) between the primary oocytes like in Laodelphax striatellus Fall., when the egg has reached a certain size (upto 0,03 mm). The symbiotes single penetrate into the epithel, which is loosed at this time, and enter the primary oocyte at the posterior pole. There they form a symbiote ball, which is growing larger until egg laying. It is enclosed by the chorion and guarantees the symbiont equipment of the next host generation.