普雅凤梨的离体培养与植株再生

1植物名称普雅凤梨（Puya raimondii Harms．）。 2材料类别种子。     

几种隐花凤梨属观赏植物的组织培养(简报)

褐叶小风梨(Cryptanthus acaulis)、褐带纹小凤梨(C. lacerdes)和双带纹隐花凤梨(C. bivittatus)均系风梨科隐花凤梨属植物。原产于南美洲热带地区,属陆生植物。常生于岩石缝隙间、枯枝败叶上,适于高温高湿的环境生长,对干旱有较强的适应能力。其共同特点是:植株矮小;叶狭长,剑形,莲座状着生;花小,白色,着生于上部叶腋处。可作为袖珍盆景,如配置其它花草,更是景观奇特,是庭园花坛布置不可多得的观赏植物。     

Coming next:Special Issue on “microRNAs”

The journal Genomics Proteomics & Bioinformatics(GPB) is now processing a special issue on the topic of "microRNAs"(to be published in the 5th issue of 2012) for compilation.This special issue was organized by Dr.Tongbin Li from LC Sciences,LLC and Dr.William Chi-Shing Cho from Queen Elizabeth Hospital,Hong Kong.     

光照强度对3种大型卷瓣凤梨叶片解剖结构及光合色素含量的影响

为了明确卷瓣凤梨属植物不同种类对环境光强的适应性差异,该研究以3种大型卷瓣凤梨属植物的成熟植株为研究对象,在全光照(CK)、40%光照(S₄₀)、10%光照(S₁₀)3种环境下生长近4个月后进行叶解剖结构特征的观测以及光合色素含量的测定。结果表明：(1)3种卷瓣凤梨的叶解剖结构大致相似,叶的上下表皮均由单层细胞组成,且细胞内壁加厚;表皮层发达;表皮细胞下为多层的含水组织;叶肉组织中分化出明显的栅栏组织和海绵组织,栅栏组织呈独特的拱状排列,下面形成椭圆形至长圆形的气腔,内含丰富的海绵组织,气腔与叶下表面的气孔下室连接,从而有利于叶片内部的气体交换,保证在叶基部常年处于积水的环境下叶内部仍有充足的气体用于光合作用。(2)环境光强对卷瓣凤梨属植物叶解剖结构特征的影响因种而异,其中‘格拉齐’对环境光强的变化较为敏感,其叶片厚度、角质层厚度、海绵组织占比以及栅海比在不同光强下产生了显著变化,而‘红帝’和‘优雅’除角质层厚度发生显著变化外其余指标均未发生显著变化;3种卷瓣凤梨叶气孔密度在不同光照处理下均几乎没有发生变化,且‘红帝’和‘优雅’的叶气孔密度较为接近并均显著高于‘格拉齐’,表明不同种类的卷瓣凤梨在叶解剖结构上存在遗传上的差异,且性状较为稳定。(3)环境光强对3种卷瓣凤梨叶片光合色素含量的影响显著,且不同种类卷瓣凤梨对光强变化的响应存在差异,在全光照(CK)和40%光照(S₄₀)处理下3种卷瓣凤梨的Chl_a/Chl_b在2.73～3.03之间,接近阳生叶的特征,而在10%光照(S₁₀) 处理下Chl_a/Chl_b均下降,其中‘格拉齐’最低为2.53,接近阴生叶的比值。研究发现, 3种卷瓣凤梨对于强光的耐受性表现为帝王卷瓣凤梨(红叶型)＞‘优雅’卷瓣凤梨＞卷瓣凤梨格拉齐,对于弱光环境的表现则相反;帝王卷瓣凤梨(红叶型)和‘优雅’卷瓣凤梨适合室外光线较好处或半阴环境;格拉齐卷瓣凤梨则适合于室外林荫处,夏季应尽量避免强光直射,且该种较适应展览温室的弱光环境。     

Profile of Dr. Hefeng Huang

<正>Dr. Hefeng Huang received her Bachelor’s degree in 1982 and Master’s degree in 1989 from the Zhejiang Medical University, now known as the Zhejiang University Medical School in Hangzhou, China. After graduation, she served as a doctor of obstetrics and gynecology at the Zhejiang Women’s Hospital, School of Medicine, Zhejiang University. From1990 to 1991, she underwent training for assisted reproduction technology (ART) at the Queen Mary Hospital of the Hong Kong University. Subsequently, she returned to the     

贝母属(Fritillaria)植物同物异名现象与思考

贝母属(Fritillaria)植物种类丰富,分布区域广泛。在国内外植物分类研究中,很多种类的分类学地位较为混乱,出现了大量同物异名的现象,为该属植物的研究造成巨大障碍。因此以《Flora of China》中记述的贝母属植物种类为基础,整理了我国近些年来不同学者对该属植物的新发现与新归并;并结合英国皇家植物园(邱园)的Plant List数据库中记录的贝母属植物种类,对该属植物的名称进行了详细的梳理,列举了存在"同物异名"问题的贝母属物种。为研究贝母属植物的分类及该属植物的开发与利用,提供科学参考。     

Somatic embryogenesis and plant regeneration in Lilium longiflorum Thunb

Friable callus was obtained from styles and flower pedicels of Lilium longiflorum Snow Queen and the Oriental lily hybrid Star Gazer on Murashige and Skoog (MS) media containing either 2 μm dicamba or 2 μm picloram. Cell suspension cultures were established by suspending the callus of L. longiflorum Snow Queen in liquid medium containing 2 μm dicamba. Through a purification process, a fine fast-growing cell suspension was obtained. This suspension was composed of a homogenous population of small dense cells, which tended to organise into embryo like structures (ELS). In liquid culture with the auxin dicamba, the ELS underwent continuous callus formation. When transferred to solidified hormone-free MS medium, the ELS germinated, forming complete plantlets. Histological investigation showed that in the ELS both shoot and root meristems were distinctly evident. It was concluded that the ELS obtained were in fact somatic embryos. Received: 4 April 1997 / Revision received: 13 May 1997 / Accepted: 15 June 1997     

观赏凤梨

提起凤梨科,人们首先想到的是著名热带水果凤梨（菠萝）,然而,殊不知凤梨科还有不少植物可供栽培观赏,其多彩的叶片,美艳的苞片和花朵,富有很好的观赏价值,是一类很有潜力的花卉资源和有待普及的观赏植物。凤梨科植物共有约46属2000多种,主要分布于南美洲高温高湿的热带雨林地区至多崖礁的海岸林带,可分为陆生和附生两大类,栽培观赏的凤梨科植物大多数为附生凤梨。这类植物大多无茎,叶狭长带状,通常基生,莲座状排列,叶片颜色丰富多彩,并常有色彩相间的纵向条纹或横向斑带;花通常两性,3基数,组成项生的穗状、头状或圆锥花…