Abstract：
Little is known about the chemosensory system of gustation in sea lampreys, basal jawless vertebrates that feed voraciously on live prey. The objective of this study was to investigate taste bud distribution and chemosensory responses along the length of the pharynx in the sea lamprey. Scanning electron microscopy and immunocytochemistry revealed taste buds and associated axons at all six lateral pharyngeal locations between the seven pairs of internal gill pores. The most rostral pharyngeal region contained more and larger taste buds than the most caudal region. Taste receptor cell responses were recorded to sweet, bitter, amino acids and the bile acid taurocholic acid, as well as to adenosine triphosphate. Similar chemosensory responses were observed at all six pharyngeal locations with taste buds. Overall, this study shows prominent taste buds and taste receptor cell activity in the seven pharyngeal regions of the sea lamprey.
摘要：
人们对海鸥味觉的化学感觉系统知之甚少，基部无颚脊椎动物，以活食为食。这项研究的目的是研究海七匙咽部沿咽部长度的味蕾分布和化学感应反应。扫描电子显微镜和免疫细胞化学显示，在七对内部g孔之间的所有六个侧咽部位置都有味蕾和相关轴突。最前端的咽部区域比最尾部区域包含更多和更大的味蕾。记录味觉受体细胞对甜味的反应，苦涩,氨基酸和胆汁酸牛磺胆酸，以及三磷酸腺苷。在所有六个具有味蕾的咽部位置观察到类似的化学感应反应。总的来说,这项研究表明，在海洋七叶鱼的七个咽区，有明显的味蕾和味觉感受器细胞活性。
