Physiological mechanisms underlying the control of meal size in Manduca sexta larvae
Physiological mechanisms underlying the control of meal size in Manduca sexta larvae
复制标题
烟草天蛾幼虫膳食大小控制的生理机制
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
S. Reynolds
中科院分区：
文献类型：
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作者：
W. A. Timmins;S. Reynolds
抽象的。烟草天蛾Manduca sexta（L.）当他们被剥夺食物的时间超过通常的餐间间隔时，他们吃的比平常多（c。45分钟）。从最后一餐开始，餐量随着时间的推移而增加，直到180分钟，此时约为正常值的3倍。没有证据表明来自肠道的体积反馈在控制膳食量方面的作用。将石蜡油/蜡混合物或凡士林（凡士林）注射到前肠、中肠或直肠中不能减少膳食量。与假手术对照组相比，切断返神经未能改变膳食量（尽管两组的膳食量均小于未手术对照组）。相比之下，注射可溶性营养素的提取物从饮食到中肠抑制了一些昆虫的进食，并减少了其他昆虫随后的膳食量。适当的对照显示，这些效应不是由于注射的体积或渗透效应。这些结果意味着，营养反馈在控制饭量中起着重要的作用，而体积反馈可能是不重要的。
Abstract. Fifth stadium larvae of the tobacco hornworm, Manduca sexta (L.), ate larger meals than usual when they had been deprived of food for periods of time longer than the usual intermeal interval (c. 45 min). Meal size increased with time since the last meal until 180 min, when it was about 3 times normal. There was no evidence of a role for volumetric feedback from the gut in controlling meal size. Injections of a paraffin oil/wax mixture, or of petroleum jelly (Vaseline) into the foregut, midgut or rectum failed to decrease meal size. Cutting the recurrent nerve failed to alter meal size compared to sham‐operated controls (although both groups took smaller meals than unoperated controls). By contrast, injections of an extract of soluble nutrients from the diet into the midgut inhibited feeding in some insects and reduced subsequent meal size in others. Appropriate controls showed that these effects were not due to the volumetric or osmotic effects of the injections. These results imply that nutrient feedback plays an important role in controlling meal size in Manduca caterpillars, while volumetric feedback is probably unimportant.
影响因子：
18.2
作者：
Figlewicz,DP;Lacour,F;Sipols,A;PorteJr,D;Woods,SC
通讯作者：
Woods,SC