山东藨草属苞片下表皮微形态的研究

利用光学显微镜对山东产藨草属（Scirpus）11个类群的苞片下表皮微形态进行了观察和研究。结果表明,该属11个种的苞片下表皮微形态根据脉间气孔器列数可以分为两个类型,其中类型Ⅰ：脉间气孔器为4~12列,又可分为2个亚类型;类型Ⅱ：脉间气孔器为1~2列,又可分为4个亚类型。研究表明：藨草属苞片下表皮微形态支持藨草属中藨草亚属和秆状苞藨草亚属的划分;支持藨草亚属中具球茎藨草组和丝状刚毛藨草组的划分;支持秆状苞藨草亚属中藨草组的成立;对于湖边藨草组提出了不同的处理意见：该组仅包括青岛藨草S.trisetosusTang etWang和藨草S.triqueterL.两种,并将剑苞藨草S.ehrenbergiiB cklr.和水葱S.validusVahl分别独立成组,其新组名分别为：Sect.EhrenbergiiF.Z.Li,＆L.N.Liu sect.nov.,Sect.ValidusF.Z.Li,＆L.N.Liu sect.nov.。     

绢蒿属8种植物果实微形态特征及其分类学意义

为寻找绢蒿属系统学的新证据,应用解剖镜和扫描电镜对我国8种绢蒿属植物的果实微形态特征进行了比较观察。结果表明,绢蒿属8种植物果实形状相似性较高,呈倒卵形或长倒卵形,直或稍弯曲;果脐圆形,常偏向一侧;顶端中央均可见花柱残留物,边缘具衣领状环;果实表面纹饰为搓板状和不规则皱褶纹饰。这些果实微形态特征中,果实的表面纹饰具有一定的差异,特别是次级结构,可作为绢蒿属植物区分种的参考性状之一。     

山东堇菜属（堇菜科）植物叶表皮微形态的比较研究

利用光学显微镜对山东堇菜属Viola L.20种2变种植物的叶上、下表皮微形态进行了研究。结果表明,该属植物叶表皮细胞为多边形或不规则形,垂周壁为波形、浅波形或平直弓形,气孔器为不等型（偶上表皮兼有平列型）。根据其上表皮是否具有平列型气孔器,可将其分为两个类型,即①上表皮有平列型气孔器,如三色堇;②上表皮无平列型气孔器,如该属绝大多数植物。类型②又根据叶表皮细胞形状和垂周壁式样之不同,进一步划分为4个亚类型。表皮细胞形状和垂周壁式样对该属内种、变种的鉴定具有重要的意义。不赞成将早开堇菜、茜堇菜合并到紫花地丁;不支持将阴地堇菜作为蒙古堇菜的鉴定;不支持将泰山堇菜合并到早开堇菜、将总裂叶堇菜降为裂叶堇菜的变种。     

A screening approach reveals the influence of mineral coating morphology on human mesenchymal stem cell differentiation

“Biomimetic” inorganic coating on biomaterials has been an active area of research with the aim of providing bioactive surfaces that can regulate cell behavior. Previous studies have demonstrated that human mesenchymal stem cell (hMSC) behavior is differentially regulated by the physical and chemical properties of inorganic mineral coatings, indicating that modulation of mineral properties is potentially important in regulating hMSC behavior. However, the lack of an efficient experimental context, in which to study stem cell behavior on inorganic substrates, has made it difficult to systematically study the effects of specific mineral coating parameters on hMSC behavior. In this study, we developed an efficient experimental platform to screen for the effects of mineral coating morphology on hMSC expansion and differentiation. hMSC expansion on mineral coatings was regulated by the micro-scale morphology of these coatings, with greater expansion on small granule-like coatings when compared to plate-like or net-like coatings. In contrast, hMSC osteogenic differentiation was inversely correlated with cell expansion on mineral coatings indicating that mineral coating morphology was a key parameter that regulates hMSC differentiation. The effect of mineral coating morphology on hMSC behavior underlines the utility of this inorganic screening platform to identify optimal coatings for medical devices and bone tissue engineering applications.     

Changes in tendon spatial frequency parameters with loading

To examine and compare the loading related changes in micro-morphology of the patellar tendon.Fifteen healthy young males (age 19 ± 3 yrs, body mass 83 ± 5 kg) were utilised in a within subjects matched pairs design. B mode ultrasound images were taken in the sagittal plane of the patellar tendon at rest with the knee at 90° flexion. Repeat images were taken whilst the subjects were carrying out maximal voluntary isometric contractions.Spatial frequency parameters related to the tendon morphology were determined within regions of interest (ROI) from the B mode images at rest and during isometric contractions.A number of spatial parameters were observed to be significantly different between resting and contracted images (Peak spatial frequency radius (PSFR), axis ratio, spatial Q-factor, PSFR amplitude ratio, and the sum). These spatial frequency parameters were indicative of acute alterations in the tendon micro-morphology with loading.Acute loading modifies the micro-morphology of the tendon, as observed via spatial frequency analysis. Further research is warranted to explore its utility with regard to different loading induced micro-morphological alterations, as these could give valuable insight not only to aid strengthening of this tissue but also optimization of recovery from injury and treatment of conditions such as tendinopathies.     

富宁附地菜果实形态特征及其分类学意义

紫草科(Boraginaceae)附地菜属(Trigonotis)的果实形态具有重要的分类学意义,是该属组级水平划分的重要依据。而该属之中的中国特有种富宁附地菜(T.funingensis)果实形态特征尚不清楚,其组级水平分类学地位的归属尚存疑问。野外考察在广西那坡采集到该种成熟果实,在解剖镜和扫描电镜下观察形态特征并补充描述。结果表明,该种小坚果无柄,且呈倒三棱锥状四面体形,背面三角状宽卵形,腹面3个面近等大。因此,该种应置于附地菜属倒棱锥果组Sect. Elongatae Ohwi。     

内蒙古地区锦鸡儿属三种植物叶表皮微形态比较研究

利用光学显微镜（LM）和扫描电子显微镜（SEM）对内蒙古地区自然生境中生长的小叶锦鸡儿（Caragana microphylla Lam.）、中间锦鸡儿（C. davazamcii Sancz.）和柠条锦鸡儿（C. korshinskii Kom）叶表皮微形态进行了观察,并测定了相应的数量指标。结果表明：所有材料的上下表皮细胞均为不规则形或多边形,垂周壁主要为平直或拱形,稀有浅波状;多数材料具鳞片状和层状蜡被;角质层多为条纹状;均有气孔器分布,类型多样,以不等细胞型和无规则型为主;气孔外拱盖多覆盖蜡被,内缘多光滑或浅波状;乳突只出现在小叶锦鸡儿和中间锦鸡儿,而柠条锦鸡儿没有出现。该研究表明,3种植物叶表皮微形态受遗传因子和环境条件共同作用,多数特征在属的水平上保持稳定,少数性状可以用作种分类的辅助指标;表皮微形态特征显示三者在生态适应对策上具有相似性,而在种间关系上可能中间锦鸡儿与小叶锦鸡儿的亲缘关系更近。     

山东小麦族植物叶表皮微形态的研究

利用光学显微镜,对山东小麦族5属9种植物的叶片下表皮微形态特征进行了研究。叶片下表皮微形态在属间差异明显,可作为分属的参考依据;山东5种鹅观草属植物的叶片下表皮微形态可分为两种类型,这与形态上划分的拟披碱草组和犬草组相一致。