Oleanene triterpenes from Sedum lineare Thunb

One new olean-13(18)-ene-3,12,19-trione (1), and two known oleanene triterpenes δ-amyrone (2), and δ-amyrine acetate (3) were isolated from the petroleum ether fraction from an alcoholic extract of the whole plant of Sedum linear Thunb. The new compound was characterized by means of spectroscopic methods including 1D, 2D NMR and HR-ESI–MS, and was further confirmed by X-ray diffraction analysis. The known ones were established on the basis of comparing their NMR data with those of the corresponding compounds in the literature. In addition, the inhibitory effects of the compounds isolated on the TNF-α and NO production were examined in vitro.     

景天科植物基因组DNA的高效提取方法

采用CTAB法,低浓度的乙醇与NaCl沉淀DNA,再用正丁醇进一步萃取多糖,建立了景天科特种植物的DNA提取方法,获得的DNA经琼脂糖电泳和紫外分析仪检测,浓度和质量均较高。用线粒体nad7基因的特异引物对该法提取的大花红景天DNA进行扩增,获得了长为791bp片段的目标序列。结果表明:该法有利于去除景天科植物材料中多糖、多酚类和RNA等物质,获得的高质量基因组DNA完全可以满足各种分子生物学研究的要求。     

6种景天科多肉植物短时高温胁迫耐热性评价

为评价多肉植物的耐热性,以6种景天科多肉品种为材料,通过短时高温胁迫处理,用电导率法结合Logistic方程对其耐热性进行鉴定.结果表明,随着处理温度升高,供试材料相对电导率逐渐升高,呈"S"型曲线变化趋势.供试材料半致死温度(LT50)介于53.17～61.68℃之间.根据LT50结果,确定供试的6个景天科多肉品种的...     

5种景天科地被植物抗旱性比较研究

通过对5种景天科地被植物干旱胁迫处理后的丙二醛(MDA)含量、脯氨酸含量、可溶性总糖含量、相对含水量等指标的观察测定,评定了5种地被植物的抗旱性。结果表明:5种景天科地被植物均有一定的抗旱性,但抗旱性强弱不同,其中胭脂红景天抗旱性最强,其余抗旱性较弱。     

关中地区屋顶绿化中景天科植物色彩搭配的相融性研究

摘要：以景天科植物佛甲草、垂盆草、红景天和黄景天为主要实验对象,通过4a多的屋顶栽培实验发现,混合群落的抗病性、抗虫性、抗草性、耐寒性以及群落的冬季覆盖率等较之于单一群落都有不同程度的提高。植物的侵略性方面,垂盆草的侵略性最强,红景天的抗侵略性最强。在利用这些不同颜色的景天科植物进行色彩搭配制作色块或图案的实验中发现,黄景天的单一群落不能安全越冬,不能用来做单色色块,但其在混合群落中能够安全越冬;可用红景天单独作色块,或在各色块之间用红景天种植带来抗阻佛甲草和垂盆草等侵略性强的植物从而保证屋顶草皮色块形状的持续保留。     

河北省景天科(Crassulaceae)野生植物资源分析

为全面掌握河北省景天科野生植物资源现状,对该科植物区系及资源价值进行了研究。通过对河北省景天科野生植物种质资源信息进行分类研究发现,该科野生植物共10属22种,其中药用植物10种、食用植物5种、观赏植物4种;提出可通过开展繁殖和栽培技术研究、选育优良品种、重视资源的综合利用及建立种质资源库和中药材生产基地等各种举措的实施,实现河北省景天科野生植物种质资源的可持续利用。     

Comparison of establishment methods for extensive green roofs in southern Sweden

The most common technique for establishment of thin extensive green roofs in Sweden has been using prefabricated vegetation mats. Our study investigated (1) how the establishment of green roofs in Sweden was influenced by the establishment method (prefabricated vegetation mat, plug-plant, shoot), substrate composition and species mixture, and (2) whether on-site construction was a possible alternative. The establishment of the vegetation, which in all cases consisted of succulent species, was recorded using the quadrate point intercept method in fixed plots and the success measured as frequency cover.Prefabricated vegetation mats had higher succulent plant cover than on-site constructed roofs. There was no difference in succulent plant cover between plots established using plug-plants compared to shoots. Shoot-established plots had more moss than the other establishment methods. The commercial substrate ‘Roof soil’ had significantly higher succulent plant cover than the other substrates, which might be related to a higher nutrient content. The organic content of the non-commercial substrates was rapidly decomposed. The standard species mixture produced a higher cover than both the mix developed for northern conditions and the mix with an increased proportion of big leaved species. The total cover of the plots was mainly dependent on the cover of two species: Sedum album (L.) and Sedum acre (L.). Few species managed to establish spontaneously but the establishment of woody species highlighted the need for proper maintenance.     

A new epicatechin gallate and calpain inhibitory activity from Orostachys japonicus

Calpains are calcium-dependent proteases that cleave a variety of intracellular substrates. The overactivation of mu-calpain is associated with a wide range of disease conditions. To search for calpain inhibitors from natural products, the phytochemical constituents of the ethyl acetate fraction of the whole plant of Orostachys japonicus (Crassulaceae) were studied. The various chromatographic separation of this fraction led to the isolation of a new tannin, (-)-epicatechin 5-gallate (1) along with 9 known compounds. Their structures were elucidated by spectroscopic and chemical analyses. Among them, (-)-epicatechin 5-gallate (1) and kaempferol (9) exhibited moderate inhibitory activity against mu-calpain with IC(50) values of 18.0+/-2.9 and 15.4+/-2.0 microg/ml, respectively.     

中国景天科植物一新种——伴矿景天

本文描述了景天属(景天科)一新种,即伴矿景天(SedumplumbizincicolaX.H.GuoetS.B.Zhousp.nov.)。     

A note on the origin of Kalanchoë x vadensis Boom & Zeilinga (Crassulaceae)

Summary K x vadensis is a hybrid of K. blossfeldiana and K. marmorata obtained after doubling the number of chromosomes.