双色革鞍螨雄螨及后若螨描述(蜱螨亚纲:中气门目:胭螨科)

描述双色革鞍螨Gamasellodes bicolor(Berlese,1948)雄螨及后若螨.     

粗秆高产小麦茎结构特性分析

以高产小麦(Triticum aestivum L.)新品种"兰考906-4"与北京大面积种植的小麦品种"京411"为实验材料,运用植物解剖学、化学和力学的理论与方法,对粗秆的高产小麦茎结构特性做了详细的比较研究.结果表明:粗秆的高产小麦品种茎秆在物理力学特性、维管束结构特征以及木质素含量等方面,均明显优于一般小麦品种.因此,在超高产小麦品种的育种中,重视外源基因的引进,改进茎秆的结构特性及提高木质素的含量等综合指标,可能是一个重要的选育方向.     

鲤鱼野生群体线粒体部分基因片段序列比较

通过对线粒体16S rRNA基因、D-loop区和Cyt b基因部分片段测定,探讨我国鲤鱼C.carpio野生群体和云南大头鲤C.pellegrini的遗传变异和亲缘关系.数据和并后用于分析的序列共1 492 bp,变异位点221个,含简约信息位点217个,其中新疆群体用于分析的序列长度为1 478 bp.以云南大头鲤为外群,推测鲤鱼群体问的系统发育关系和分化时间,MP法和NJ法得到相似的系统树,新疆群体与其他群体的差异较大,遗传距离较远,单独聚为一支,其他群体间相似性较高聚在一起,新疆群体与其他群体间的分化时间约为2.42×106～2.45×106年前.     

Effects of Dehydration and Rehydration on Photosynthesis of Detached Leaves of the Resurrective Plant Boea hygrometrica

Fluorescence induction kinetics was used to investigate the effects of dehydration and rehydration on photosynthesis of detached leaves of the desiccation-tolerant, resurrective plant Boea hygrometrica (Bunge) R. Br. In comparison with the desiccation-intolerant plant Chirita heterotricha Merr., the PSⅡphotochemical activity of Boea hygrometrica was characterized by a faster decline during dehydration and a much higher capacity of recovery during rehydration. By means of native PAGE, it was further shown that the thylakoid pigment-protein complexes of Boea hygrometrica were highly stable during dehydration and rehydration. These features may contribute to the extreme desiccation resistance of photosynthesis apparatus of resurrective plant Boea hygrometrica.     

菠菜细胞色素b6f复合体中单线态氧的产生和清除机制（英文）

采用自旋捕捉电子顺磁共振技术研究了强光诱导下菠菜Cyt b6f中单线态氧(1O2*)产生和清除的分子机制,结果表明:在强光照射和有氧条件下,缺失Rieske Fe-S蛋白的Cytb6f和分离的Rieske Fe-S蛋白溶液中都检测到1O2*的产生,这证明Chla和Rieske Fe-S蛋白都是菠菜Cytb6f中光诱导1O2*产生的位点,而Chla是1O2*产生的主要部位。采用波长为675 nm的红光选择性激发Cytb6f中的Chla时,也检测到1O2*的产生,进一步支持了上述结论。此外,外加天然抗氧化物质,如抗坏血酸、谷胱甘肽、L-组氨酸和β-胡萝卜素,可清除系统中产生的1O2*。这很可能是菠菜Cytb6f中一种保护底物抵抗单线态氧光氧化的保护机制。     

湖南江永石灰岩山地青檀群落特征研究

研究了湖南江永石灰岩山地青檀(Pteroceltis tatarinowii Maxim)群落的区系组成、地理成分、种类成分的数量特征、生活型及物种多样性特征.结果表明:在2 800 m2青檀群落样方中有维管植物51种,隶属于34科48属.植物地理分布以泛热带成分最多,有13属,占总属数的29.54%;其次是旧世界热带分布类型、北温带分布类型、东亚和北美洲间断分布类型,它们各有5属,各占总属数的11.36%.植物生活型以高位芽植物最多,占70.59%,一年生植物最少,仅为1.96%.群落层次中,以灌木层和草本层物种数所占比例较大.物种多样性分析表明,Shannon-Wiener指数、Simpson指数和PIE指数均表现出Sh>H>T,反映了青檀群落乔木层优势种表现明显,该群落目前相对稳定.对青檀群落的物种构成及资源保护和可持续利用问题进行了讨论.     

以乳突切迹和翼钩为基点的侧颅底分区方法

目的：探讨以乳突切迹和翼钩为基点的侧颅底分区新方法。方法：在乳突切迹后缘、翼钩、枕骨大孔前缘中点和颧根四个结构间相互连线,区分侧颅底并测量连线的长度。结果：乳突切迹与侧颅底重要结构的关系密切,切迹后缘与翼钩连线和正中线将侧颅底分成内、外侧两个大的三角区,每个区再分成前后两个三角区共四个三角区,即腭和颞下三角、咽三角、关节和听三角、血管神经三角,其中血管神经三角的三边长度左右侧分别为（74.52±5.47）mm和（74.66±5.41）mm、（59.77±3.84）mm和（59.67±3.56）mm、（42.23±3.11）mm和（42.48±2.60）mm。结论：本研究提供了新的侧颅底分区方法,且血管神经三角的区域划分更为科学,为临床侧颅底手术入路和定位提供了解剖学参考。     

中国瘿螨亚科Eriophyinae二新种记述 （蜱螨亚纲：瘿螨科）

 描述了瘿螨亚科二新种：胡枝子瘤瘿螨Aceria lespedezae Kuang,sp.nov.,模式产地 辽宁鞍山市;竹斜瘿螨Acaralox bambusae Kuang,sp.nov.,模式产地湖南冷水江市。     

Relationship between leaf photosynthetic function at grain filling stage and yield in super high-yielding hybrid rice (Oryza sativa. L)

The characteristics of dry matter production before and after heading and the relationships between photosynthesis of flag leaves and dry matter accumulation in panicles were investigated on super high-yielding rice cv. Xieyou 9308 (the yield of up to 12 t/ha) with rice cv. Xieyou 63 as a control. The results showed that (i) the capacity of dry matter production before and after heading in Xieyou 9308, i.e. biomass and daily dry matter production, was remarkably higher than that in Xieyou 63, especially after heading; (ii) CO2 assimilation capacity in flag leaves in Xieyou 9308, namely Leaf Source Capacity (LSC), was also significantly higher than that in Xieyou 63, and the supply of photosynthate in leaves and the demand of grain filling were completely synchronous in Xieyou 9308, but photosynthetic function in flag leaves in Xieyou 63 declined sharply 20 days after heading and it was not enough to meet the demand of grain filling. These results confirmed that high efficient photosynthetic function in     

杨树叶锈病研究

松杨栅锈菌（Melampsora larici-populina）导致的杨树叶锈病是杨树病害中分布最广、危害最大的一种病害,它造成杨树林的材积损失和材质下降,严重制约着杨树商品林和生态林的发展。该文从病原菌的分布和寄主种类、病原菌生理分化、寄主抗锈性及分子标记、防治措施等几方面介绍了杨树叶锈病的研究。