Effects of temperature and [His7]‐corazonin on the body darkening in Locusta migratoria
Effects of temperature and [His7]‐corazonin on the body darkening in Locusta migratoria
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温度和[His7]-corazonin对飞蝗体色变黑的影响
DOI：
10.1111/j.1365-3032.2003.00346.x
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发表时间：
2003
影响因子：
1.5
通讯作者：
S. Tanaka
中科院分区：
文献类型：
--
作者：
S. Tanaka
摘要：[His 7]-corazonin是一种神经肽，诱导蝗虫的深色。 本文研究了温度对飞蝗体色的影响。L.注射低剂量（1 pmol）的[His 7]-corazonin导致白化病小鼠在25-34 °C下出现深色，但在38和42 °C下几乎没有发生变暗。 然而，即使在这些高温下，注射高剂量（10 pmol）也会诱导变暗。 将注射1 pmol [His 7]-corazonin的大鼠从30 °C转移至42 °C，反之亦然，表明温度在注射后的任何时间都会影响变暗。 使用市售计算机软件测量前胸背板的亮度，以跟踪身体变暗的连续变化。注射[His 7]-corazonin的鱼的体色在25 °C时为红棕色，在30和34 °C时为黑色，在38和42 °C时为灰色或白色。 高温也抑制了正常（色素）菌株的变暗。在前三个体育场中，从30 °C转移到42 °C的大多数蝗虫在第五个体育场中发展为浅色，而没有在较低温度下通常表现在群居蝗虫中的醒目黑色图案。当在前一个体育场的中期注射[His 7]‐corazonin时，这些个体在第五个体育场中形成了黑色图案。这些结果表明，高温可能通过抑制正常蝗虫中[His 7]-corazonin的释放来诱导浅色体着色。
Abstract. [His7]‐corazonin is a neuropeptide that induces dark coloration in locusts. This study examined the effect of temperature on body colour in the migratory locust, Locusta migratoria. L. Injection of a low dose (1 pmol) of [His7]‐corazonin caused albino nymphs to develop dark coloration at 25–34 °C, but little darkening occurred at 38 and 42 °C. However, injection of a high dose (10 pmol) induced darkening even at these high temperatures. Transfer of nymphs injected with 1 pmol of [His7]‐corazonin from 30 to 42 °C, and vice versa, indicated that temperature influenced darkening at any time after injection. Measurements of the luminance of the pronotum were made using commercially available computer software to follow continuous changes in darkening of the body. The body colour of nymphs injected with [His7]‐corazonin was reddish‐brown at 25 °C, blackish at 30 and 34 °C, and greyish or whitish at 38 and 42 °C. High temperature also suppressed darkening in a normal (pigmented) strain. Most nymphs transferred from 30 to 42 °C during the first three stadia developed a light colour in the fifth stadium without the striking black patterns that are typically manifested in gregarious nymphs at lower temperatures. Such individuals developed black patterns in the fifth stadium when injected with [His7]‐corazonin at a mid stage of the previous stadium. These results indicate that high temperature may induce light body coloration by suppressing the release of [His7]‐corazonin in normal locusts.