Lin T -M., Lee H -J.
Department of Plant Pathology and Entomology, National Taiwan University, Taipei, Taiwan
J Insect Physiol. 1998 Nov;44(11):1039-1051. doi: 10.1016/s0022-1910(98)00069-9.
We have studied the effects of ovaries, juvenile hormone (JH) and mating on locomotor activity and sexual receptivity of female German cockroaches. Our results indicate that locomotor activity and sexual receptivity are under the same control mechanisms. The ovary served as a negative masking factor for the locomotor circadian rhythm, but did not affect the frequency of locomotor activity. We conclude that JH controls the locomotor activity of females from the following evidence: (1) increasing locomotion of virgin females coincided with an increasing volume of the corpora allata; (2) allatectomy reduced female locomotion significantly; (3) after absorbing the JH analogue (fenoxycarb) through their tarsi, allatectomized females regained their high level of locomotor activity. Since the daily locomotor activity of allatectomized and ovari-allatectomized females changed cyclically with continuous (non-cyclic) contact of fenoxycarb, an unidentified factor which was independent of ovarian development is proposed to regulate cyclic locomotor activity. In addition to controlling the frequency of locomotor activity, JH was essential for the expression of the locomotor circadian rhythm because allatectomy abolished the circadian rhythm expressed in ovariectomized females. Mating significantly decreased the frequency of locomotor activity and the degree of sexual receptivity. The inhibitory effect of mating resulted from the transmission of a mating signal through the ventral nerve cord when sperm was transferred successfully. The mating experiments with allatectomized and ovariectomized females showed that JH was the major factor in regulating the expression of sexual receptivity.
我们研究了卵巢、保幼激素（JH）和交配对德国雌性蟑螂运动活性和性接受能力的影响。我们的结果表明，运动活性和性接受能力受相同的控制机制调控。卵巢作为运动昼夜节律的负性掩盖因子，但不影响运动活性的频率。基于以下证据，我们得出结论：JH控制雌性蟑螂的运动活性：（1）未交配雌性蟑螂运动增加与咽侧体体积增大相一致；（2）切除咽侧体显著降低雌性蟑螂的运动；（3）切除咽侧体的雌性蟑螂通过跗节吸收JH类似物（苯氧威）后，恢复了高水平的运动活性。由于切除咽侧体和卵巢-切除咽侧体的雌性蟑螂的日常运动活性随苯氧威的持续（非周期性）接触呈周期性变化，因此提出一个独立于卵巢发育的未知因子来调节周期性运动活性。除了控制运动活性的频率外，JH对于运动昼夜节律的表达也至关重要，因为切除咽侧体消除了卵巢切除雌性蟑螂所表现出的昼夜节律。交配显著降低了运动活性的频率和性接受程度。交配的抑制作用是在精子成功转移时通过腹神经索传递交配信号所致。对切除咽侧体和卵巢切除雌性蟑螂的交配实验表明，JH是调节性接受表达的主要因素。
