同色兜兰的组织培养与快速繁殖

1植物名称同色兜兰[Paphiopedilum concolor（Bateman）Pfitz．]。 2材料类别种子。 3培养条件种子萌发培养基：（1）MS＋100mL·L^-1香蕉汁;（2）1／2MS＋100mL·L^-1香蕉汁。原球茎继代增殖培养基：（3）1／2MS＋NAA0．2mg·L^-1（单位下同）＋100mL·L^-1香蕉汁;（4）1／2MS＋NAA0．4＋100mL·L^-1香蕉汁;（5）1／2MS＋6-BA0．5＋NAA0．2＋100mL·L^-1。     

足茎毛兰组培快繁技术研究

在足茎毛兰的组培快繁过程中,有机添加物10％的椰乳对原球茎的诱导有极显著影响;激素组合6-BA和NAA及配比10∶1对芽的诱导和增殖起明显的促进作用;一定浓度的IBA对足茎毛兰的壮苗生根起关键性作用;栽培基质的选择极大地影响足茎毛兰的移栽成活率.     

<Emphasis Type="Italic">Kyrgyzsaurus bukhanchenkoi</Emphasis> gen. et sp. nov., a new reptile from the triassic of southwestern Kyrgyzstan

A new reptile, Kyrgyzsaurus bukhanchenkoi gen. et sp. nov., from the Triassic (Madygen Formation) of southwestern Kyrgyzstan is described based on the anterior part of the skeleton (skull, cervical and anterior dorsal vertebrae, ribs, pectoral girdle) and skin imprints. This is the most archaic representative of the family Drepanosauridae (Archosauromorpha, Diapsida). The most prominent features of the new form are the shortened lower jaw, numerous teeth, granular body osteoderms, large supraorbital shelflike skin folds, and thick and extensive throat sac.     

贵州省两栖动物生存状况评价及其保护需求初探

针对我国野生动物保护的实情,为便于各省区有关部门制订野生濒危动物的保护等级,通过对国内外物种濒危等级标准的全面分析,建议省级保护物种濒危等级的数量标准为:濒危级En分布面积为1个县;易危级T分布面积小于3个县;关注级C分布面积小于5个县.结合贵州省两栖动物已有文献资料数据及作者近三十年来野外考察数据,按上述指标对贵州省已知的72种两栖动物的濒危等级进行了评估.     

Influence of heavy-metal contamination on plant response to water availability in white birch,Betula papyrifera

Elevated concentrations of heavy metals in growth substrate are known to reduce root growth more than shoot growth. We hypothesized an increased sensitivity to drought in plants exposed to heavy metals. The hypothesis was tested using birch seedlings grown on a substrate with three levels of Cu–Ni containing slag (0%, 0.5% and 2.5%) mixed with sand, and were either well watered or exposed to drought. The experiment was conducted outdoors for 4 months. Both the slag addition and low substrate moisture reduced plant dry mass. There was a significant slag × moisture interaction. The effect of moisture was most pronounced on slag-free substrate, whereas at the highest slag addition level there was no growth response to moisture. Stem diameter, length of radial file and cell size showed similar responses, but error variation was high and the individual effects were not always significant. The general picture is, however, clear, the effect of moisture on all growth parameters increasing with decreasing slag concentration in the substrate. We conclude that metal-contaminated substrate leads to an inability of the plants to respond to improved soil moisture, an effect which can be seen even at metal levels which do not show any large growth reduction. In addition, reduced plant size, caused by heavy metals, results in feedbacks that increase the relative availability of water and mineral nutrients. At the highest slag addition level, substrate moisture was slightly higher than in controls, probably due to a reduced transpiration, and the senescence was slower, probably due to lower nutrient requirements of the smaller plants.     

长唇羊耳蒜的组织培养与快速繁殖

1植物名称 长唇羊耳蒜（Liparis pauliana Hand.-Mazz.）. 2材料类别 种子。     

西藏羊湖地区近1.4万年以来孢粉植物群及古气候研究

通过对西藏羊湖地区ZK1和卡拉苏代牙剖面（IP16）的孢粉分析和总有机碳（TOC）、元素含量分析等,建立了羊湖地区近1.4万年以来的孢粉组合带、重建当时的植被类型及古气候演变序列。结果显示：该时期经历了5次植被类型的更替,即草原型→疏林草原型→草原型→疏林草原型→草原型,与之相对应的气候经历了5次波动（2个半旋回）, 即11 220 a.B.P.左右的第一气候旋回：由干旱→半干旱半湿润转化;8 970a.B.P.左右的第二气候旋回,同样由干旱→半干旱半湿润转化,然后进入半个气候旋回,即干旱气候期,推测今后有可能进入半干旱半湿润气候期。     

Transcriptome sequencing of okra (Abelmoschus esculentus L. Moench) uncovers differently expressed genes responding to drought stress

Journal of Plant Biochemistry and Biotechnology - Drought affects the growth and development of plants and can cause crop failure. As an important edible and medicinal plant, okra (Abelmoschus...