水养植物,盛夏清凉

正玫瑰、多肉、栀子花……很多在印象中只长在土里的植物,放在水里竟然也养得郁郁葱葱。水和绿,最适合给燥热的心情降温。夏天养一些水培植物放在室内,叶、茎、花、根都可以成为观赏的一部分。今天我们就来看看最常见的两种水培方法。水培养护:1.刚插的时候,隔一天换一次水,根系长出后,秋冬季每月换水一次,夏季适当增加换水次数,保持水质清澈。     

我国的淀粉、糖类和纤维植物资源及其用于乙醇发酵的探讨

概述了目前乙醇发酵用淀粉和糖类植物的应用研究进展,调查了我国淀粉类、糖类和纤维类植物资源的主要种类,为我国野生能源植物资源开发提供依据。     

Fish-poison plants as insecticides

Ohne Zusammenfassung

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Fish-poison plants as insecticides A Review of recent Work. (Fischgiftpflanzen als Insektengifte. Ein überblick über das neuere Schrifttum.) Von F. Tattersfield (Rothamsted Experimental Station, Harpenden, Herts., England. The Empire Journal of Experimental Agriculture. Bd. IV, Nr. 14, April 1936. S. 136–144.

     

Obesity and medicinal plants

The effects of some medicinal plants (i.e. Fucus vesiculosus, Citrus aurantium) that are claimed to be useful in the treatment of obesity are reviewed.     

Temperature-induced hormesis in plants

Environmental change attracts particular attention by biologists concerned with the performance of biological systems under stress. To investigate these, dose–response relationships should be clarified. It was previously assumed that the fundamental nature of biological dose–responses follows a linear model, either with no threshold or with a threshold below which no effects are expected to occur in biological endpoints. However, substantial literature, including widespread documentation in plants, has revealed that hormesis commonly occurs. Hormesis is highly generalized and can be utilized as a quantitative measure of biological plasticity. Conditioning induced by adaptive responses also occurs in the framework of hormesis and is of particular importance to environmental change biology with regards to evolutionary adaptations.This paper presents additional evidence for hormetic dose responses induced by temperature in plants. The current understanding on hormesis provides a perspective for next generation environmental change research. Hormesis should have a central role in environmental change biology of vegetation.     

Transgenic woody plants for biofuel

Transgenic trees as a new source for biofuel have brought a great interest in tree biotechnology. Genetically modifying forest trees for ethanol production have advantages in technical challenges, costs, environmental concerns, and financial problems over some of crops. Genetic engineering of forest trees can be used to reduce the level of lignin, to produce the fast-growing trees, to develop trees with higher cellulose, and to allow the trees to be grown more widely. Trees can establish themselves in the field with less care of farmers, compared to most of crops. Transgenic crops as a new source for biofuel have been recently reviewed in several reviews. Here, we overview transgenic woody plants as a new source for biofuel including genetically modified woody plants and environment; main focus of woody plants genetic modifications; solar to chemical energy transfer; cellulose biosynthesis; lignin biosynthesis; and cellulosic ethanol as biofuel.     

Hemagglutinating activity of Curcuma plants

Crude proteins obtained by Mg/NP-40 extraction from Thai medicinal plants of the Curcuma species exhibited agglutination activity against rabbit erythrocytes. A crude extract from Salingalinthong, a Thai Curcuma specie, exhibited the strongest hemagglutinating activity, 2 x 10(-5) mg/ml.     

护卫植物的动物

许多鸟儿是“绿野的卫士”，起到保护农田和森林的作用。树林里，毛虫大量繁殖起来，它们吃食树叶，使树木凋萎。栎树林遭到大批毒蚕蛾的袭击。处于奄奄一息。蠹虫的幼虫、天牛和它的幼虫，钻进树皮的肉内层组织、木质部分，成了树木的隐患。柳树林受到柳瘿虫危害，树干发育畸形成瘤瘿。     

园林植物与城市生态

文章分析园林植物具有改善城市生态环境和保护城市生态环境的作用,认识园林植物具有除尘杀菌、吸收有毒气体、防止噪音、涵养水源、保持水土、美化环境等城市绿化功能。     

南非的欧石南(Erica)植物

介绍南非的欧石南属（Erica）植物种类,分布及其Erica arborea（树状欧石南）,Erica glandulosa（腺毛欧石南）和Erica perspicua等品种。