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- W2004306564 abstract "Abstract Function of the Endosymbiotic Fungi of the Cigarette Beetle Lasioderma serricorne F. (Col., Anobiidae) when reared in protein deficient diets. In diets with 1% or 0.5% of a dried yeast preparation as the sole N source the mortality of normal and aposymbiotic larvae of L. serricorne was nearly identical. With 0.1% yeast the mortality of normal larvae was significantly lower than that of aposymbiotic. Development of normal larvae was superior to that of aposymbiotic in series of test diets containing decreasing protein concentrations. Uric acid (2%) enhanced growth only of normal larvae. Regarding these results we propose a feed‐back system elucidating the function of the endosymbiotes of wood destroying insects: The microorganisms utilize part of the excretory products of the host, possibly also N compounds from the food, as N sources for the synthesis of those amino acids they furnish to the host. Zusammenfassung In Diäten mit 1% oder 0,5% Trockenhefe als einziger N‐Quelle war die Mortalität normaler und aposymbiontischer Larven des Tabakkäfers etwa gleich; mit 0,1 % Hefe lag die Mortalität normaler Tiefe signifikant unter der aposymbiontischer (Abb. 1). In Versuchsreihen mit fallenden Proteinkonzentrationen entwickelten sich normale Larven besser als aposymbiontische. Harnsäure (2 %) förderte das Wachstum normaler, nicht jedoch aposymbiontischer Tiere (Abb. 2, 3). Auf Grund dieser Befunde wird ein feed‐back‐System vorgeschlagen, das die Rolle der Endosymbionten holzzerstörender Insekten erklären soll (Abb. 4): Die Mikroorganismen verwenden einen Teil der Exkretionsprodukte des Wirtes, eventuell auch für diesen wertlose N‐Verbindungen aus der Nahrung, für eine Synthese jener Aminosäuren, die sie dem Wirte liefern." @default.
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- W2004306564 date "1972-01-12" @default.
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- W2004306564 title "Die Funktion der endosymbiontischen Pilze des Tabakkäfers Lasioderma serricorne F. (Col., Anobiidae) bei einer Aufzucht unter Proteinmangelbedingungen1" @default.
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- W2004306564 doi "https://doi.org/10.1111/j.1439-0418.1972.tb02235.x" @default.
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