Resolution of pheromone pulses in receptor cells of Antheraea polyphemus at different temperatures
Resolution of pheromone pulses in receptor cells of Antheraea polyphemus at different temperatures
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DOI：
10.1007/bf00194984
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发表时间：
1996-09-01
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影响因子：
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通讯作者：
Kodadova, B
中科院分区：
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作者：
Kodadova, B
在不同温度（8℃、18℃、28℃）条件下，测定了雄性多翅Antheraea polyphemus （Saturniidae）信息素受体细胞对刺激脉冲的分辨能力。细胞被反复注射20毫秒的信息素成分（E，Z）-6,11-十六烯二烯乙酸酯和（E，Z）-6,11-十六烯二烯醛刺激。在较高温度下，高频率的刺激脉冲被神经脉冲反应分解：在8℃时约为1.25脉冲/s，在18℃时为2.5脉冲/s，在28℃时为5脉冲/s。受体细胞在低温下分解刺激脉冲的能力下降可能会减少雄蛾到达信息素源的机会。温度越高，神经脉冲峰值频率越高，单脉冲神经脉冲反应持续时间越短。在给定的温度和刺激强度下，神经脉冲峰值频率随着刺激脉冲间隔的缩短而降低，但反应的持续时间几乎保持不变。在较低温度下，由单一刺激脉冲引起的适应恢复所需的时间更长。醛受体细胞比乙酸细胞恢复得快。在低刺激浓度下，乙酸细胞的分辨能力明显下降，而醛细胞的分辨能力仅轻微受损。
The ability of pheromone receptor cells of male Antheraea polyphemus (Saturniidae) to resolve stimulus pulses was determined at different temperatures (8 degrees, 18 degrees, 28 degrees C). The cells were stimulated by repeated 20-ms puffs of the pheromone components (E,Z)-6,11-hexadecadienyl acetate and (E,Z)-6,11-hexadecadienal. At higher temperatures, higher frequencies of stimulus pulses were resolved by the nerve-impulse response: about 1.25 pulses per second at 8 degrees C, 2.5 pulses/s at 18 degrees C and 5 pulses/s at 28 degrees C. The decreased ability of receptor cells to resolve stimulus pulses at low temperatures may reduce the male moth's chance of reaching the pheromone source. The peak nerve-impulse frequency increased whereas the duration of nerve-impulse responses to single stimulus pulses decreased at higher temperatures. At a given temperature and stimulus intensity the peak nerve-impulse frequency decreased with shorter intervals between the stimulus pulses, but the duration of the responses remained almost constant. The time needed for recovery from adaptation caused by a single stimulus pulse was longer at lower temperatures. The aldehyde receptor cell recovered more quickly than the acetate cell. At low stimulus concentration, the resolution ability of the acetate cell was strongly decreased, whereas in the aldehyde cell it was only slightly impaired.