藻类分子生物技术两年评─—与藻类活性物质研究有关的生物技术   总被引：4，自引：2，他引：4  

严小军  秦松  曾呈奎 《海洋与湖沼》1997,28(4):440-446

根据１９９２年６月－１９９４年６月国内外发表资料，评述海洋藻类活性物质研究的生物技术及最新成果。认为，海洋生物活性物质研究的重心正转向与海洋生物技术有关的研究。运用生物技术筛选、提取并生产藻类活性物质已经成为这一领域的主流。综合文献表明，藻类活性物质的生物技术正走向成熟，大量的活性物质被发现，光生物反应器将成为主要的下游生产技术，通过藻类基因工程生产药物已初现端倪。  相似文献   

中国北方盐田和盐湖高盐水域藻类的初步研究   总被引：3，自引：0，他引：3  

马志珍 《海洋与湖沼》1995,26(3):317-322

于１９８６年３月－１９９０年９月，对中国北方一些盐田和盐湖的高盐水域（盐度６１．０－３２０．０）中的藻类（主要是浮游藻）进行调查。在青岛东风盐场和天津汉沽盐场每月２次定点采集藻类标本水样７２份以及随机在山西解地、青海尕海，新疆达板城盐湖和巴里坤湖采集水样５份。鉴定出蓝藻５种，绿藻８种，硅藻８种。结果表明，均是典型的耐盐或喜盐种类，但其种的多样与水体的盐度呈负相关，藻类种群生物量以春季和秋季最为丰富  相似文献   

藻类分子生物技术两年评─—与藻类活性物质研究有关的生物技术     

严小军  秦松  曾呈奎 《海洋与湖沼》1997,(4)

根据1992年6月—1994年6月国内外发表资料，评述海洋藻类活性物质研究的生物技术及最新成果。认为，海洋生物活性物质研究的重心正转向与海洋生物技术有关的研究。运用生物技术筛选、提取并生产藻类活性物质已经成为这一领域的主流。综合文献表明，藻类活性物质研究的生物技术正走向成熟，大量的活性物质被发现，光生物反应器将成为主要的下游生产技术，通过藻类基因工程生产药物已初现端倪。  相似文献   

从第九届国际光合作用大会看藻类分子遗传学发展趋势   总被引：2，自引：2，他引：2       下载免费PDF全文

秦松 《海洋与湖沼》1993,24(6):656-663

根据１９９２年８月３０日－９月４日在日本名古层如开的第九届国际光合作用大会上交流的以藻类为材料的研究论文，综述了分子遗传学方面的研究成果。认为这些成果体现了光合作用研究的最新进展，蕴含有一定的应用前景；表明类分子遗传学不仅是藻类学研究领域的带头学科，而且已经活跃在光合作用等重大生物学问题研究的前沿；反映了藻类分子遗传学向解决生物学重大问题和推动藻类资料开发方向发展的趋势。  相似文献   

海洋植物营养素的应用研究　Ⅰ.金藻类的培养     

龙丽娟  孙恢礼  何伟宏 《热带海洋学报》1998,(1)

用不同含量的93－B型海洋植物营养素对几种常用的金藻类饵料种进行培养对比试验。结果表明,海洋植物营养素用于培养金藻类效果良好,最适使用含量为30mp·L~-1域40mg·L~-1。此时效果与通常被推荐的培养液所培养的对照组相当或更好．含量过高,则造成某些营养盐过量而产生一定的毒害作用。此营养素使用简便。  相似文献   

Species Composition and Some Ecological Notes on Diatom Communities of a Lotic Environment in Tarhunãh,Libya Artenzusammensetzung und einige ökologische Notizen über Diatomeengesellschaften eines lotischen Biotops in Tarhunãh/Libyen     

M. A. Khan 《洁净——土壤、空气、水》1994,22(1):28-31

Libya occupies a large part of the Sahara Desert, and is a predominantly arid country with extremely scarce freshwaters. Despite aridity, a distinct higher rainfall zone exists along its mediterranean coastal belt. A lotic environment (perennial stream) in Ain-Scersciara, Tarhunãh in northwest Libya was studied for the species composition of diatom communities and their ecological characteristics. The waters are generally alkaline (pH = 7.5) and of hard-water (conductivity = 2008 μS/cm) type. The epiphytic diatom growth on benthic filamentous algae was high (32 taxa) with Amphora veneta as a very common taxon. Gomphonema parvulum var. micropus was an important taxon found in scrapings from the leaves of macrophytes and stony substratum. Nitzschia and Navicula showed high species richness (9 taxa in each) followed by Gomphonema (6 taxa). The ecological attributes of the majority of taxa show an oligohalobe status and alkaliphilous indicator.  相似文献   

Controls on the nature and distribution of an alga in coal mine-waste environments and its potential impact on water quality   总被引：2，自引：0，他引：2  

S. S. Brake  H. K. Dannelly  K. A. Connors 《Environmental Geology》2001,40(4-5):458-469

 A dominant non-bacterial microorganism that may strongly impact environmental conditions in acid mine drainage at several Indiana coal mine sites is a single-celled protozoan, Euglena mutabilis. Field data suggest E. mutabilis has high tolerance for elevated total dissolved solids (TDS), to 18 g/l, and acid conditions to pH 1.7. Distribution is restricted to unmixed effluent pH<4.6, with prolific growth between pH 3.0 and 3.5. Additional factors influencing E. mutabilis include preference for areas with lower mineral/colloidal precipitation rates and a stable substrate of iron-rich precipitates. Initial studies indicate that in areas of prolific growth it contributes to oversaturation of dissolved oxygen by up to 200%. The presence of small orange intracellular crystalline-like structures, similar in color to iron oxyhydroxides, suggests that E. mutabilis may be sequestering iron, and possibly other metals. Further work is needed to determine if E. mutabilis contributes to natural mitigation of poor water quality at these and other coal mine sites. Received: 13 January 2000 · Accepted: 2 May 2000  相似文献   

隐花植物对UV-B辐射响应和适应机制的研究进展          下载免费PDF全文

回嵘  李新荣  贾荣亮  赵昕  刘立超 《干旱区地理》2012,35(4):623-630

 隐花植物是指不产生种子的植物,是我国干旱、半干旱地区主要表面特征——生物土壤结皮的组成成分,并在其中扮演着独特而重要的生态作用。隐花植物对环境因子变化的响应和适应能力大小对整个生态系统稳定性具有重要影响。因此,有关增强UV-B辐射对隐花植物影响的研究已成为目前UV-B辐射研究领域的发展趋势和热点之一。通过系统地综述国内外有关隐花植物对UV-B辐射响应和适应机制研究方面的进展,分析了研究趋势,讨论了目前该领域研究的一些不足并对未来发展提出了展望,以期促进隐花植物的研究,加深对我国干旱、半干旱区隐花植物在应对UV-B辐射增强的响应和适应机制的认识。  相似文献   

Climate driven changes in subtidal kelp forest communities in NW Spain     

《Marine environmental research》2013

Reconstructions suggest a massive decline of nearly 1400 ha of kelp forest in North Western Spain in 2007. In line with global rising temperatures, we hypothesized that Sea Surface Temperature (SST) surpassed a lethal threshold for kelp. We examined whether changes in SST correlated to the proposed decline in kelp forest. All investigated SST characteristics suggested to affect kelp abundance increased significantly during the past thirty years, reaching extreme values during the last decade. In addition over the past two decades, the landscape formerly dominated by both cold and warm temperate canopy forming and understory species changed to one dominated by warm temperate understory species, resulting in a loss of vertical community structure. Fisheries landing data of kelp associated species was used to support the suggested change in kelp abundance. Subsequent recovery of the kelp appears to be occurring in deeper waters.  相似文献   

Phytoplankton based assessment of the ecological status of four shallow lakes (Eastern Poland) according to Water Framework Directive - a comparison of approaches   总被引：2，自引：0，他引：2  

Agnieszka Pasztaleniec  Ma?gorzata Poniewozik 《Limnologica》2010,40(3):251-3828

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