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当前位置: 首页 > 文章 > 七星瓢虫成虫下颚须上的化学感受器 昆虫学报 1987,30 (2) 146-151+237-239
Position: Home > Articles > THE CHEMORECEPTORS ON THE MAXILLARY PALPS OF THE ADULT LADY BIRD BEETLE COCCINELLA SEPTEMPUNCTATA Acta Entomologica Sinica 1987,30 (2) 146-151+237-239

七星瓢虫成虫下颚须上的化学感受器

作  者：
严福顺;钦俊德;项秀芬
单  位：
中国科学院动物研究所
关键词：
七星瓢虫;下颚须;味觉感受器;嗅觉感受器;栓锥感受器
摘  要：
七星瓢虫成虫下颚须端节的内侧是一个船背形隆起的平面,其上着生栓锥形化学感受器约1,500个,其中一半左右是味觉感受器,其余为嗅觉感受器。每一个味觉感受器小体内,有感受细胞4—8个,它们的树突远区通过感橛腔时,或处于同一个感橛腔中,或在2个感橛腔中,或在3个感橛腔中。每一个嗅觉感受器小体内,感受细胞的数目恒为3个,有限大的感受器淋巴腔。感橛较薄,终止于栓锥腔的基部。树突在栓锥腔内分枝。栓锥的顶部有许多半球状突起。下颚须内所具有的感受细胞比下唇须内所具有的超百倍之多,由取食时下颚须的动作来判断,它们的主要作用在于寻找和试探食物。
译  名：
THE CHEMORECEPTORS ON THE MAXILLARY PALPS OF THE ADULT LADY BIRD BEETLE COCCINELLA SEPTEMPUNCTATA
作  者：
YAN FU-SHUN QIN JUN-DE XIANG XIU-FEN(Institute of Zoology, Academia Sinica)
关键词：
Coccinella septempunctata——maxillary palpus——gustatory receptor—— olfactory receptor——sensillum basiconicum
摘  要：
The maxillary palp of the adult Coccinella septempunctata bears about 1,500 sensilla basi-conica on the inner lateral surface of the terminal segment. About half of these sensilla resemble the sensilla on the abial palps instructure and seem to be gustatory in function, each sensillum containing 4-8 neurones and the distal segrnents of the dendrites enclosed in scolopales with at least three types of compartmentation. The rest of the sensilla are cylindrical, each about 3×1 micra in size, with rough,flat top where no openings has been found. The sensillum con-tains three neurones, one tormogen. cell and one. trichogen cell. Between the tormogen cell and the trichogen cell there is a large receptorlymph cavity. The scolopale is only marked with weak wall and terminates at the base of the cuticular projection or peg. The dendrites in the lumen of the peg subdivide into many fine branches. These sensilla seem to be olfactory in function. Our observation indicates that both the maxillary and labial palps function for de-tection of food when the beetle comes across an aphid or a piece of artificial diet, as seen in the rapid palpation. But the chemoreceptors on the maxillary palps seem co play different role from those on the labial palps during feeding when the maxillary palps are lifted aloft in the air while the labial palps remain in contact with the food. Therefore, they seem to function for the detection of the food rather tlian in regulation of food intake as feeding is in progress.

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