Zheng Chunyan, Yang Dongyu, Li Zhiqiang, Xu Yijuan
Department of Entomology, South China Agricultural University, 510640, Guangzhou, China.
Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Institute of Applied Biological Resources, 510260, Guangzhou, China.
Ecotoxicology. 2018 Jul;27(5):619-626. doi: 10.1007/s10646-018-1934-4. Epub 2018 Apr 11.
The objective of this study was to evaluate the toxicity of flavor enhancers to the oriental fruit fly Bactrocera dorsalis (Hendel). The flavor enhancers glycine, disodium guanylate, succinic acid disodium salt, monosodium glutamate (MSG), disodium inosinate, and L-alanine significantly increased the mortality of B. dorsalis flies. The mortality of flies that fed on glycine, disodium guanylate, succinic acid disodium salt, and MSG was greater than 90%. Additionally, fruit fly mortality increased with increases in both time and concentration. Glycine not only reduced the climbing ability of B. dorsalis but also affected the duration and frequency of its behavioral patterns (flight, walking, grooming and inactivity). Compared with adult flies in the control group, adult B. dorsalis flies that fed on glycine exhibited a significantly increased duration and frequency of inactivity and a decreased duration and frequency of both flight and walking. However, the effect of glycine on grooming activity was not significant. These findings demonstrate the toxic effects of flavor enhancers on B. dorsalis. Glycine also affected the behavior of adult flies at a low dose. Therefore, glycine has potentially toxic to insects and also likely to have a negative impact at sublethal concentrations.
本研究的目的是评估增味剂对桔小实蝇（Bactrocera dorsalis (Hendel)）的毒性。增味剂甘氨酸、鸟苷酸二钠、琥珀酸二钠盐、味精（MSG）、肌苷酸二钠和L-丙氨酸显著提高了桔小实蝇的死亡率。取食甘氨酸、鸟苷酸二钠、琥珀酸二钠盐和味精的果蝇死亡率超过90%。此外，果蝇死亡率随时间和浓度的增加而增加。甘氨酸不仅降低了桔小实蝇的攀爬能力，还影响其行为模式（飞行、行走、梳理和静止）的持续时间和频率。与对照组的成年果蝇相比，取食甘氨酸的桔小实蝇成年果蝇静止的持续时间和频率显著增加，飞行和行走的持续时间和频率减少。然而，甘氨酸对梳理活动的影响不显著。这些发现证明了增味剂对桔小实蝇的毒性作用。甘氨酸在低剂量时也会影响成年果蝇的行为。因此，甘氨酸对昆虫具有潜在毒性，并且在亚致死浓度下也可能产生负面影响。
