AMINO-ACID METABOLISM DURING FLIGHT IN TSETSE FLIES
AMINO-ACID METABOLISM DURING FLIGHT IN TSETSE FLIES
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DOI：
10.1016/0022-1910(76)90040-8
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发表时间：
1976-01-01
影响因子：
2.2
通讯作者：
HARGROVE, JW
中科院分区：
文献类型：
--
作者：
HARGROVE, JW
使用淡舌藻进行的实验表明，在胸部脯氨酸储备降至低水平后，飞行可以持续至少 4 至 7 分钟，这表明还有其他能量来源。早期的研究表明，飞行过程中形成的丙氨酸从胸部运输到腹部，在那里重新合成脯氨酸。使用 14 C丙氨酸的注射实验证实，运输机制确实发生，并且通过飞行而增强，并且丙氨酸在腹部比在胸部更快地掺入谷氨酸和脯氨酸。对已发表研究的分析表明，有证据表明，即使在飞行的早期阶段，残留的血粉氨基酸也参与其中，并支持了它们对于延长飞行时间至关重要的建议。飞行早期阶段氨基氮的下降与此时谷氨酸脱氢酶的作用一致。普通果蝇的飞行时间差可能是由于脯氨酸水平低和缺乏残留血粉所致。注意到非常高的能量消耗，并且似乎与苍蝇的吸血和胎生习性所需的异常大的肌肉组织有关。
Experiments carried out using teneralGlossina pallidipesindicate that flight can continue for at least 4 to 7 min after the thoracic proline reserves have fallen to low levels, suggesting that some other energy source is available. Earlier work suggests that alanine formed during flight is transported from the thorax to the abdomen where proline is resynthesized. Injection experiments using14C alanine confirm that the transport mechanism does occur, that it is enhanced by flight, and that alanine is more rapidly incorporated into glutamate and proline in the abdomen than in the thorax. An analysis of published work shows that there is evidence for the involvement of residual blood meal amino acids even in the early stages of flight and supports the suggestion that they are of importance in prolonging flight. A decline in amino nitrogen during the early stages of flight is consistent with the action of glutamate dehydrogenase at this time. The poor flight durations in teneral flies may be due both to the low proline levels and to the absence of the residual blood meal. Very high energy consumptions are noted and appear to be related to the abnormally large musculature necessary for the fly's haematophagous and viviparous habits.