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关键词： Ajuga decumbens Thunb   Anti-inflammatory   Antitumor   Antibacterial   Antiviral   Cytotoxic   Insecticidal   Diterpenes   Iridoids glycosides  

摘要： Ajuga decumbens Thunb is a member of Labiatae family and widespread in China, Korea and Japan. This plant possesses diverse pharmacological activities, such as anti-inflammatory, antitumor, antibacterial, antiviral, cytotoxic, as well as insecticidal activities. Several compounds have been isolated from A. decumbens, which display a wide spectrum of biological and pharmacological activities. Hence, it would be useful to review current literature for available pharmacological activities of the plant as well as its active ingredients.

关键词： ACOUSTICS (Physical sciences)   BATS   RESEARCH   PITCHER plants  

摘要： A new study shows that a carnivorous plant attracts bats by possessing modified pitfall taps that increase the reflectivity of echolocation calls. Bats benefit by finding roosting sites, and the plants gain by receiving nitrogen from guano.

关键词： ISLANDS   NONFICTION  

摘要： The article reviews the book "The Biology of Island Floras," edited by David Bramwell and Juli Caujapé-Castells.

关键词： INSECTS   NONFICTION  

摘要： The article reviews the book "Life in a Gall: The Biology and Ecology of Insects That Live in Plant Galls," by Rosalind Blanche.

关键词： PLANT nematodes   NONFICTION  

摘要： The article reviews the book "Plant Nematodes: Methodology, Morphology, Systematics, Biology and Ecology," by Mujeebur Rahman Khan.

关键词： ERRATA (Publishing)   SOIL biology   PERIODICAL publishing   PERIODICAL articles   PUBLISHERS & publishing   ARTICLES (Published materials)   PUBLICATIONS  

关键词： 植物生理学   竞赛试题   奥林匹克   生物学   生态学   形态学   葡萄糖含量   实验  

摘要： 任务l：植物提取物中葡萄糖含量的测定（44分） 1．1标准曲线（13．5分） 1．2葡萄糖含量（测定原始数据15分） 1．3数据分析（15分）

关键词： Bactericera cockerelli   life table   Liberibacter   silverleaf nightshade  

摘要： The potato psyllid, Bactericera cockerelli (Sulc), vectors the pathogen "Candidatus Liberibacter solanacearum" (Lso), causal agent of zebra chip disease of potato. Several cultivated and wild plants are reported to serve as alternate hosts for B. cockerelli and Lso, including silverleaf nightshade (SLN), a wild solanaceous woody perennial weed that occurs throughout Texas. Experiments were conducted in the laboratory to compare performance of Lso-infected and Lso-free B. cockerelli on SLN and potato. Results showed that host plants and Lso-infection significantly influenced the performance of B. cockerelli. Egg incubation and nymphal development of Lso-infected and Lso-free immatures were prolonged on SLN compared with potato indicating a host effect. Generally, Lso-infected B. cockerelli immatures developed faster on both SLN and potato, although significantly more Lso-free nymphs survived than nymphs that harbored the pathogen. Lso-free adults also lived longer and laid more eggs on potato than SLN. According to life table estimates, intrinsic and finite rates of increase of Lso-infected B. cockerelli were not significantly different from Lso-free individuals on potato and SLN. Analysis of the two factors revealed significant interaction effects between host and Lso and that development and reproduction of B. cockerelli is a function of both Lso-infection and host on which it fed. Results of this study suggests that Lso does not have a negative effect in the overall performance of B. cockerelli on both hosts and also demonstrated SLN to be an important alternative host that supports survival of Lso-infected and Lso-free B. cockerelli populations.

关键词： 白刺属植物   空间分布   生物学特性   生态效益  

摘要： 根据实地考察和相关参考资料,运用历史文献和统计分析方法,对新疆白刺属植物的空间分布、生物学特性及生态效益进行了研究分析。结果显示：（1）白刺属植物全世界有12种,中国有8种,其中新疆有6种,分别为泡果白刺、大果白刺、白刺、帕米尔白刺、西伯利亚白刺、唐古特白刺,主要分布于塔里木盆地西部,准噶尔盆地和吐鲁番盆地的山前洪冲积扇的扇缘带,湖盆边缘及荒漠河流沿岸阶地;（2）新疆白刺属植物灌木或小灌木,高0.5-2m,树皮灰白色,枝端成刺状;托叶细小,单叶互生,肉质,全缘,长10-25mm,宽2-5mm;花小,两性花,雌雄同株,顶生聚伞花序,白色或淡黄色;花数5,雄蕊10-15,子房上位;浆果状核果,种子1粒;（3）白刺植物分枝多,枝茎机械组织和根系发达,被沙土埋覆后能产生大量不定根,从而形成白刺沙堆,可拦截流沙,降低地下水位及土壤盐分含量,改善立地土壤的理化性状;白刺属植物是在塔里木和准噶尔盆地严酷的自然生态条件下生态造林理想的灌木种之一。

关键词： 白刺属植物   半荒漠地区   景观植物   荒漠植被   荒漠区   流动沙丘   荒漠地带   超旱生   帕米尔白刺   唐古特白刺  

摘要： 白刺植物为超旱生或旱生灌木或小灌木,是中亚大陆荒漠地带的典型景观植物,也是荒漠区系灌木层片中优势种或建群种之一。在我国,主要分布于西北及北部降水稀少的干旱荒漠和半荒漠地区,是内蒙古、甘肃和新疆一带荒漠植被的重要建群种之一。