. The Biological bulletin. Biology; Zoology; Marine biology. EFFECT OF GLUCOSAMINE ON DROSOPHILA 311 1. Figure 5. Parasagittal section of a glucosamine-induced phenocopy of crc in the Ore-R strain showing the detailed structures of the eye, E; optic lobe, O ; longitudinal thoracic muscles, T ; muscles of the appendages, L. A large portion of the brain is in the abdomen demarcated by A. which induced any noticeable morphological changes. The list of substances tested included N-acetyl glucosamine, thiamine hydrochloride, fructose, glucose, lactose, starch, mannitol, salicin, casein hydrolysate,
. The Biological bulletin. Biology; Zoology; Marine biology. EFFECT OF GLUCOSAMINE ON DROSOPHILA 311 1. Figure 5. Parasagittal section of a glucosamine-induced phenocopy of crc in the Ore-R strain showing the detailed structures of the eye, E; optic lobe, O ; longitudinal thoracic muscles, T ; muscles of the appendages, L. A large portion of the brain is in the abdomen demarcated by A. which induced any noticeable morphological changes. The list of substances tested included N-acetyl glucosamine, thiamine hydrochloride, fructose, glucose, lactose, starch, mannitol, salicin, casein hydrolysate, nucleic acid hydrolysate, glycogen, melibiose, trehalose, ribose, sorbose, inulin, sucrose, maltose and galactose. Drosophila larvae 65 hours of age were removed from food and placed on paper moistened with distilled water. These larvae completed their development and normal adults were obtained. Repetition of these conditions with glucosamine hydrochloride yielded the same type of abnormalities each time, and this method Figure 1. An atypical pupa within the puparium obtained after feeding glucosamine hydrochloride to third instar larvae of the Ore-R strain. The concave discoid pigmented eye, PE, is located in the thorax ; the arrow, T, is pointing to the scutellar bristles of the thorax. Figure 2. Atypical imagoes removed from the puparium (tu'r). Note the absence of the cephalic region while the thorax and abdomen with their associated structures are well formed. Female genitalia, FG ; leg, L; male genitalia, MG ; wing, W; the larval mouthparts, still attached to the anterior region of the thorax. The legs are not fully stretched. Figures 3 and 4. Comparison of frontal sections of a glucosamine-induced abnormal pupa (tuv) and a normal tu"' imago. In the abnormal specimen in Figure 3 the brain is located in the abdomen and the eye discs are flanking the inner lateral sides of the thorax forming a cavity. Larval mouthparts, LM; carina, C; antenna, A; eye, E; muscle
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
