Adult emergence rhythm of the egg-parasitoid Telenomus busseolae
Adult emergence rhythm of the egg-parasitoid Telenomus busseolae
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DOI：
10.1023/a:1009984318289
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发表时间：
1998-01-01
期刊：
影响因子：
2.5
通讯作者：
Tsitsipis, JA
中科院分区：
文献类型：
--
作者：
Fantinou, AA;Alexandri, MP;Tsitsipis, JA
研究了不同光暗条件下，芝麻黑卵蜂的羽化节律。大多数的成年寄生蜂出现在整个光周期的周期。雄虫羽化高峰期比雌虫早2-5小时。成虫羽化在连续黑暗或光照下均为异步羽化。而L4：D20、L 8：D16、L12：D12、L16：D8和L20：D4 h等交替的光暗相制度产生了周期长度为24小时的种群节律。在4 ~ 20 h的时间段内，随着时间的延长，羽化活动的高峰由暗期移到暗中期。成虫的节律性活动在2个周期内同步，当寄生蜂的未成熟阶段在连续光照条件下（LL）生长，然后转移到L12：D12。此外，通过将节律培养物从L12：D12 h转移到LL或RR（连续红光）条件，出现节律持续存在并以自由运行的方式持续，周期长度小于24小时，表明存在昼夜节律。表达节律的生态学意义与寄生蜂更好的生存有关。
The adult emergence rhythm of Telenomus busseolae, an egg parasitoid of Sesamia nonagrioides, was examined when parasitoids were exposed to different light-dark regimes. Most of the adult parasitoids emerged throughout the whole period of the photoperiodic cycle. Peak male emergence occurred 2-5 hours earlier than that of females. Adult emergence was asynchronous in continuous darkness or light. However, regimes of alternative light and dark phases such as L4:D20, L8:D16, L12:D12, L16:D8 and L20:D4 h generated a population rhythm with a period length of 24 hours. The peak of the emergence activity moves from the scotophase to the middle of the photophase with an increase of the photophase from 4 to 20 h. Rhythmical activity of adults was synchronised within 2 cycles when immature stages of parasitoid grow under continuous light conditions (LL) and then transferred to L12:D12. Moreover, emergence rhythm persisted and continued in a free-run with a period length of less than 24 hours by transferring a rhythmic culture from L12:D12 h to LL or RR (continuous red light) conditions, indicating the existence of a circadian rhythm. The ecological implications of the expression rhythm relate to better survival of the parasitoids.