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Effects of photoperiod and temperature on reproductive diapause in Ophraella communa （Coleoptera： Chrysomelidae）, a potential biocontrol agent against Ambrosia artemisiifolia

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Insect Science 2012年第3期19卷 286-294页

作者： Dao-Hong Zhu Jing Zhu Zhao-Pu Peng Fang-Hao Wan Laboratory of Insect Behavior and Evolutionary Ecology Central South University of Forestry and TechnologyChangsha Laboratory of Zoology Hunan First Normal UniversityChangsha Institute of Plant Protection Hunan Academy of Agricultural SciencesChangsha State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina

To investigate the seasonal adaptation strategies of Ophraella communa to new habitats, the effects and regulation mechanisms of photoperiod and temperature on the reproductive diapause in a population collected from Changsha, Hunan were examined. Adults showed obvious reproductive diapause, which was regulated by photoperiod and temperature. At 30~C, there was no adult diapause occurring under either long-day or short-day conditions; at 25~C the pre-oviposition period was short and fecundity was high in adult females under L ： D 16 ： 8 h, whereas under L ： D 12 ： 12 h, a few females entered reproductive diapause; at 20~C under short-day conditions, all female adults entered diapause. The pre-oviposition period was significantly prolonged when the pupae and adults were transferred from long-days to short-days, but the day length influence was not obvious when they were transferred only in the adult stage. However, the fecundity dropped greatly no matter whether the photoperiod shifted to short-days only in the adult stage or whether the shift occurred in both the pupal and adult stage. The fecundity was extremely low when photoperiod shifted from long-days to short-days in both pupal and adult stages. This was an indication that the pupal and adult stages were the photoperiod-sensitive stage for adult reproductive diapause. This was especially true for the photoperiod in the pupal stage, which has a distinctly significant regulative effect on reproductive diapause. Additionally, this article also addresses the reason for different photoperiodic response patterns in reproductive diapause induction between the Changsha strain and the Tsukuba strain （Japan） of O. communa.

关键词： Ophraella communa photoperiod reproductive diapause temperature

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Adaptive strategies of overwintering adults： reproductive diapause and mating behavior in a grasshopper, Stenocatantops splendens （Orthoptera： Catantopidae）

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Insect Science 2013年第2期20卷 235-244页

作者： Dao-Hong Zhu Shuang-Shuang Cui Yong-Sheng Fan Zhiwei Liu Laboratory of Insect Behavior & Evolutionary Ecology Central South University of Forestry & Technology Laboratory of Zoology Hunan First Normal University Changsha China Department of Biological Sciences Eastern Illinois University Charleston Illinois USA

To understand the adaptive strategies of the overwintering adults of Steno- catantops splendens, the mechanism of maintenance and termination of the reproductive diapause, the variation in mortality between overwintering females and males, and the mating strategy of the males were investigated. The results indicated that the adult repro- ductive diapause in natural conditions was mainly regulated by photoperiod in the fall - long photoperiods promoted reproductive development and short photoperiods maintained reproductive diapause, and the sensitivity of the overwintering adults to photoperiod was over before the end of the winter. When transferred from natural conditions to controlled laboratory conditions on dates from September through February, pre-oviposition became increasingly shorter with increasingly deferred transfer dates regardless of photoperiod conditions. The adults treated with low temperature for 30 days in September through November had significantly shorter pre-oviposition, suggesting that low temperatures in winter had an important role in the termination of reproductive diapause. The female had a significantly lower supercooling point than the male, which was related to their lower mortality after winter. In addition, observations of wild populations of the species indicated that mating behavior prior to winter and the duration of pre-mating period were not affected by photoperiod; mating and sperm transfer were mostly completed by November. Compared with females only mating before winter, females mating in the spring had shorter life span, longer pre-oviposition, lower hatching rate and laid fewer egg pods while showing no significant difference with regard to ovipositional interval, per pod number of eggs and nymph dry weight.

关键词： fecundity mating behavior photoperiod reproductive diapause Stenocatan-tops splendens supercooling point

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Effects of photoperiod and temperature on reproductive diapause of Ophraella communa(Coleoptera:Chrysomelidae)

Effects of photoperiod and temperature on reproductive diapa...

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第三届全国生物入侵大会

作者： Dao-Hong Zhu~(1,2*),Jing Zhu~1,Zhao-Pu Peng~3,Fang-Hao Wan~4 1.Lab of Insect Behavior & Evolutionary Ecology,Central South University of Forestry & Technology,Changsha,410004,China 2.Lab of Zoology,Hunan First Normal University,Changsha 410250,China 3.Institute of Plant Protection,Hunan Academy of Agricultural Sciences,Changsha 410125,China 4.State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection, Chinese Academy of Agricultural Sciences,Beijing,100081,China

The chrysomelid,Ophraella communa LeSage,was recently introduced to China and has extended its distribution to districts of Northeast,North,Central,East,and South *** of its exclusive feeding habit and strong reproductive capability,*** might be utilized as a natural enemy for the biological control of ragweed,Ambrosia *** order to investigate the seasonal adaption strategies of *** to new habitats,the effects and regulation mechanisms of photoperiod and temperature on reproductive diapause in the Changsha population were examined.

关键词： Ophraella communa Photoperiod Temperature reproductive diapause

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蜕皮激素在银盾革蜱生殖滞育中的作用(英文)

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Insect Science 1994年第2期1卷 164-171页

作者：吴庆姜在阶白春玲北京师范大学生物系北京 100875 北京师范大学生物系

用高效液相色谱法和放射免疫测定法测定了银盾革蜱滞育雌虫的合神经节、血淋巴、卵巢和整体中蜕皮激素的含量,并与正常发育的雌虫做比较。结果表明,滞育雌虫血淋巴和卵巢中蜕皮激素的含量在饱血后前10天与正常发育雌虫基本上相同。饱血1... 详细信息

用高效液相色谱法和放射免疫测定法测定了银盾革蜱滞育雌虫的合神经节、血淋巴、卵巢和整体中蜕皮激素的含量,并与正常发育的雌虫做比较。结果表明,滞育雌虫血淋巴和卵巢中蜕皮激素的含量在饱血后前10天与正常发育雌虫基本上相同。饱血10天以后,滞育雌虫蜕皮激素的含量下降,较正常发育雌虫少得多。蜕皮激素的缺乏影响了卵母细胞的发育。为阐明蜕皮激素对滞育雌虫的影响,在不同时间向银盾革蜱滞育雌虫体内注入不同剂量的β-蜕皮素。刚饱血者注入大剂量(1.375和10000ng/蜱)的β-蜕皮素引起雌虫死亡。饱血后20—30天,注入一定剂量(50,70,100ng/蜱)的β-蜕皮素可以促进卵黄形成,并解除了雌虫的生殖滞育,但其所产的卵量明显少于正常发育的雌虫。应用外源蜕皮激素解除硬蜱雌虫的生殖滞育现象尚属首次报道。

关键词： ecdysteroids Dermacentor niveus reproductive diapause

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In the monarch butterfly the juvenile hormone effect upon immune response depends on the immune marker and is sex dependent

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Open Journal of Ecology 2013年第1期3卷 53-58页

作者： Guadalupe Villanueva Humberto Lanz-Mendoza Salvador Hernandez-Martinez Minerva Sanchez Zavaleta Javier Manjarrez Jose MContreras-Garduno Jorge Contreras-Garduno Center of Research in Biotic Resources Autonomous University of Mexico StateTolucaMexico Center of Research in Infectious Diseases National Institute of Public HealthCuernavacaMexico Institute of Ecology National Autonomous University of MexicoMexico CityMexico Department of Biology University of GuanajuatoGuanajuatoMexico

In insects, juvenile hormone (JH) decreases or has any effect upon the phenoloxidase (PO) activity, and favors or decreases the Antimicrobial Peptides (AMPs) expression. Although there is no information about the differential effect of such hormone, two possibilities are that it depends on (a) the immune marker recorded and (b) sexual differences. Here, three commonly used immune markers, Phenoloxidase (PO), hydrogen peroxide (H2O2), and lytic activity, were measured 3, 6 and 24 hours after administration of methoprene (JHa, an analog of juvenile hormone) in male and female monarch butterflies (Danaus plexippus). At 3 and 6 h post-JHa administration, the PO activity increased in females but it only increased at 3 h in males, whereas H2O2 levels increased only in females at 3 h. For the remaining times the JHa had a null effect on POand H2O2. On the other hand, the JHa had a null effect for lytic activity in both sexes at 3, 6 and 24 h. To our knowledge, this is the first report of a positive effect of a JHa onPOand H2O2 and suggests that this effect is sex dependent.

关键词： Immune Response Life History Juvenile Hormone reproductive diapause Nitric Oxide

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