中国栽培平菇的酯酶同工酶分析   总被引：14，自引：0，他引：14  

郑素月  张金霞  黄晨阳 《食用菌学报》2003,10(4):1-6

采用电泳技术对我国大规模栽培的64个平菇商业菌株进行酯酶同工酶分析。结果表明，我国栽培平菇菌种多样性丰富，64个菌株有44个酶谱类型，不同菌株有各自特有的酯酶同工酶酶谱。聚类分析表明，供试菌株在60％相似水平上分为6大类：第一类包括以白黄侧耳为代表的21个菌株；第二类包括以德国引进菌株为代表的6个未定种名菌株；第三类包括7个白黄侧耳与佛罗里达侧耳杂交的杂交种及4个未定种名菌株；第四类包括以佛罗里达侧耳为代表的5个菌株；第五类包括以糙皮侧耳为代表的14个菌株；第六类包括以肺形侧耳为代表的7个菌株。  相似文献   

Evaluating Sediment Accretion on a Relic Oyster Reef in Mobile Bay,Alabama     

《Journal Of Applied Aquaculture》2013,25(3):41-49

Abstract

Sediment traps were deployed at Fish River Reef (FRR), a relic oyster reef on the eastern side of Mobile Bay, and at Cedar Point Reef (CPR), a productive oyster reef on the western side of Mobile Bay, Alabama, from July through October 1999. Sediment accretion at FRR was two to three times greater than sediment accretion at CPR. The proportions of particulate organic matter and ash in the sediment at the two sites were similar. The proportion of coarse to fine sediment at CPR was greater than at FRR. Also, the sediment at FRR was black and had a sulfide odor suggesting anoxia, while the sediment at CPR was brown and odorless. Various fishes and invertebrates colonized the sediment traps at CPR, while those at FRR were devoid of live organisms. Oyster spat had settled on the shells in the traps at CPR but not on those at FRR. Results suggest that in order to restore oysters at FRR, cultch material should be dispersed during periods of peak larval settlement to prevent inhibitory levels of siltation on cultch before spat settle.  相似文献   

Inhibitory effect of niboshi on food intake     

Shigeru Nakajima  Minoru Hamada  Takahide Tsuchiya and  Hiromichi Okuda 《Fisheries Science》2000,66(4):795-797

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Mass preparation of marine silage from Undaria pinnatifida and its dietary effect for young pearl oysters     

Motoharu  UCHIDA  the late Katsuyuki  NUMAGUCHI  Masakazu  MURATA 《Fisheries Science》2004,70(3):456-462

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珠江三角洲陶瓷工业污染区植被受害证据与启示   总被引：8，自引：0，他引：8  

温达志  旷远文  刘世忠  张德强  陆耀东  黎建力 《林业研究》2006,17(1):7-12

以长期暴露在大气污染胁迫下的村边林为对象,进行植物群落结构调查、植物受害分析,探讨了陶瓷工业污染排放对植被的影响。调查样地位于广东南海区五星村边坡地的半自然次生林内,乔木层和灌木、草本幼苗层的调查分别在10个10m×10m和4个5m×5m的样方内进行。该森林群落以隆缘桉和尾叶桉数量占优势,其次是乡土树种鸭脚木、泥竹,重要值依次为26.75、17.08、16.27和11.50。隆缘桉和马尾松冠层枝叶完全枯死、脱落,受害程度达100%;其次是泥竹和南岭黄檀受害程度分别为85.1%和68.3%。尾叶桉、朴树、越南山龙眼、阴香、黄荆受害程度中等,在45%—57.5%之间;其它伴生本土种类如鸭脚木、珊瑚树、酒饼叶、等的重要值较低且表现出受害程度较严重。和上层乔木比较,林下植被受污染的伤害大大降低。桉树类树种因其速生、快速郁闭等特点被认为是华南荒山、退化丘陵地区植被恢复的重要种类,但在重度污染地区已面临严重威胁,而某些乡土树种在污染地区则显示出较强的抵御大气污染的能力。本文结果为污染地区森林资源管理,退化生态系统植被恢复之树种选择以及进一步开展乡土树种抵御大气污染胁迫的过程机制与功能特征的研究提供科学基础。  相似文献   

Osmo-responsive expression of oyster amino acid transporter gene and analysis of the regulatory region involved     

Haruhiko?ToyoharaEmail author  Masashi?Ikeda  Chika?Goto  Hideki?Sawada  Masatomi?Hosoi  Kazuaki?Takeuchi  Isao?Hayashi  Shintaro?Imamura  Michiaki?Yamashita 《Fisheries Science》2005,71(3):465-470

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基于突变级数法的城市旅游竞争力评价研究——以珠江三角洲城市为例     

喻美琴  陈朝隆 《绿色科技》2014,(7):318-320

介绍了突变理论的基本思想,并依据突变级数法构建了城市旅游竞争力评价指标体系,以珠江三角洲城市为例对其城市旅游竞争力进行了综合评价。根据对评价结果的综合分析,提出了提高珠江三角洲城市旅游竞争力的若干建议。  相似文献   

广州珠江公园植物景观空间分析     

韩付家周鹏  翁殊斐 《广东园林》2014,(1):60-63

文章对整个公园植物空间布局情况以及公园内园林植物所形成的开敞空间、半开敞空间、覆盖空间和垂直空间4种景观空间的造景特点、植物构成进行分析。尝试摆脱以园林植物为审美主体的静态观赏模式,提出园林植物应从装饰性的栽植配角转变为景观空间营造的主角,即营造舒适自然环境和游憩境域,才能达到园林营建的真正目的。  相似文献   

太平洋牡蛎控温育苗高产技术     

张玉恒  王亮 《齐鲁渔业》1997,14(3):11-12

介绍了太平洋牡蛎亲贝的选择和促熟，获卵与孵化，幼虫发育和培育技术，以及附苗和单体牡蛎苗种生产方法。  相似文献   

Taurine transporter from the giant Pacific oyster <Emphasis Type="Italic">Crassostrea gigas</Emphasis>: function and expression in response to hyper- and hypo-osmotic stress     

Masatomi Hosoi  Chuya Shinzato  Masaya Takagi  Shoko Hosoi-Tanabe  Hideki Sawada  Eri Terasawa  Haruhiko Toyohara 《Fisheries Science》2007,73(2):385-394

ABSTRACT:   Taurine is the primary osmolyte in marine molluscs, whose cellular osmo-conforming process is vital for environmental adaptation because of a lack of osmotic homeostasis. Here, cDNA cloning and expression, and functional analyses of taurine transporter (TAUT) from the giant Pacific oyster are reported on. The deduced amino-acid sequence of oyster TAUT (oyTAUT) showed 47–51% identity to those of vertebrate TAUT, whereas identity among the vertebrates is 78–95%. Functional analysis of oyTAUT expressed in Xenopus oocytes revealed that oyTAUT has a lower affinity and specificity for taurine and a requirement for higher NaCl concentration, compared with vertebrate TAUT. Taken together with similar functional properties of TAUT from mussel, indicated by our previous study, it is possible that these functional features reflect the internal environment of the molluscs (i.e. higher taurine and NaCl concentrations). Oyster taurine transporter mRNA expression was induced by not only hyper-osmotic stress, similar to other TAUT, but also hypo-osmotic stress. It is speculated that the expression in response to hypo-osmotic stress was induced by a substantial decrease in tissue taurine content following the decrease in the internal osmolality.  相似文献