连云港海区养殖优质条斑紫菜原因研究   总被引：4，自引：0，他引：4  

陈飞  张耀存  姜有山  冯家沛  张银意 《气象科学》2005,25(5):534-542

根据条斑紫菜的生物学特性及不同生育期的生长、发育要求,通过对我国沿海主要海区11～4月的海温、雾、风向、降水量及雨日和海区底质状况分析,得出连云港海区养殖条斑紫菜的客观条件比其他海区优越,所养殖的条斑紫菜品质好的结论。  相似文献   

坛紫菜(Porphyra haitanensis)化学成分的研究     

冯强  魏玉西  齐君  王长云  吴同飞 《海洋科学》2013,37(5):15-18

利用硅胶色谱、Sephadex LH-20凝胶色谱、HPLC等技术,从坛紫菜(Porphyra haitanensis)乙醇提取物首次分离纯化得到了7个化合物,通过质谱(MS)及核磁共振波谱(1H NMR、13C NMR)等现代波谱技术鉴定为：1,8-二羟基-9,10-蒽醌(1)、邻苯二甲酸二正丁酯(2)、邻苯二甲酸二异丁酯(3)、β-谷甾醇(4)、鲨肝醇(5)、(E)-N-2(1,3-二羟基-4-十八烯基)-十六酰胺(6)、胆甾醇(7)。其中,化合物1对金黄色葡萄球菌(Staphyloccocus aureus)的最低抑菌浓度(MIC)为80μg/mL。  相似文献   

Metabolic plasticity of nitrogen assimilation by Porphyra umbilicalis (Linnaeus) Kützing     

Jang K.Kim  George P.Kraemer  Charles Yarish 《中国海洋大学学报(英文版)》2012,11(4):517-526

The physical stresses associated with emersion have long been considered major factors determining the vertical zonation of intertidal seaweeds.We examined Porphyra umbilicalis(Linnaeus) Kützing thalli from the vertical extremes in elevation of an intertidal population(i.e.upper and lower intertidal zones) to determine whether Porphyra thalli acclimate to different vertical elevations on the shore with different patterns of nitrate uptake and nitrate reductase(NR) and glutamine synthetase(GS) activities in response to different degrees of emersion stress.We found that the nitrate uptake and NR recovery in the emersed tissues took longer in lower intertidal sub-population than in upper intertidal sub-population;and GS activity was also significantly affected by emersion and,interestingly,such an activity was enhanced by emersion of thalli from both upper and lower intertidal zones.These results suggested that intra-population variability in post-emersion recovery of physiological functions such as nutrient uptake and NR activity enables local adaptation and contributes to the wide vertical distribution of P.umbilicalis.The high GS activity during periodic emersion stress may be a protective mechanism enabling P.umbilicalis to assimilate nitrogen quickly when it again becomes available,and may also be an evidence of photorespiration during emersion.  相似文献   

Recurrence of the world’s largest green-tide in 2009 in Yellow Sea, China: Porphyra yezoensis aquaculture rafts confirmed as nursery for macroalgal blooms     

Dongyan Liu  John K. Keesing  Zhijun Dong  Baoping Di  Peter Fearns 《Marine pollution bulletin》2010,60(9):1423-1432

In the summer of 2008, the world’s largest green-tide occurred in the Yellow Sea, China. The hypothesized cause was the expansion of Porphyra yezoensis aquaculture along the Jiangsu coastline and the re-occurrence of a green-tide in 2009 was predicted. In this study, satellite and field images showed the formation of the June 2009 green-tide which again originated from the Jiangsu coast. The responsible species, its source and biomass accumulation were studied to support the previous hypothesis. Morphological and phylogenetic analysis demonstrated the homology of Ulva prolifera in the 2008 green-tide with the U. prolifera from P. yezoensis aquaculture rafts. About 91-505 kg/ha of U. prolifera was attached to the P. yezoensis aquaculture rafts and a total biomass of 4956 tonnes was estimated during the harvesting of P. yezoensis. This is sufficient to seed a bloom when they are dislodged from the rafts as a result of harvesting practices.  相似文献   

条斑紫菜低覆盖度基因组草图分析   总被引：1，自引：0，他引：1  

牛建峰  高胜寒  骆迎峰  袁野  王广策  胡松年 《海洋科学》2011,35(6):76-81

对条斑紫菜（Porphyra yezoensis）进行Solexa高通量测序,获得低覆盖度全基因组草图。该基因组草图大小约220Mbp,GC质量分数53．08％;包含26629个预测基因,其中16409个基因具有内含子,平均每个基因含2．22个内含子;基因结构分析表明具有内含子的基因平均长度为2214bp,内含子平均大...  相似文献   

条斑紫菜单孢子的研究   总被引：6，自引：0，他引：6  

梅俊学  费修绠  王斌 《海洋与湖沼》2001,32(4):402-407

研究了条斑紫菜不同栽培品系间在单孢子形成方面的差异，并采用RAPD方法研究了它们之间的遗传距离，还研究了温度、藻体不同发育时期、干出对单孢子形成的影响，结果表明，产生单包子多的品系与单孢子少的品系间遗传距离较远，单孢子多的品系间、单孢子少的品系间遗传距离都较近；室内培养环境能够形成单孢子的最低水温高于自然海区；大于几十个细胞的藻体在合适的温度下可以持续形成单孢子，一直到藻体成熟；在成熟的藻体上仍有单孢子放散，但大量的果胞也可以以与单孢子相同的方式放散并萌发成苗，干出对单孢子的产生没有明显的影响。  相似文献   

坛紫菜体细胞的几种发育途径   总被引：4，自引：0，他引：4  

杨锐  徐红霞  徐丽宁 《海洋湖沼通报》2006,(3):60-66

以坛紫菜(Porphyra haitaneusis)叶状体为材料,利用单细胞克隆技术,研究记录坛紫菜体细胞的发育途径。本文选择介绍了坛紫菜体细胞3种途径8种发育方式:1)多数体细胞的叶状体途径:A通过极性分裂直接形成单细胞苗;B通过叶状分裂成苗;C先形成细胞团后形成畸形苗;2)来自雌、雄叶片未成熟区域体细胞的性细胞途径:D发育形成精子囊并放散精子;E单细胞发育形成类似果孢子囊结构再放散果孢子,果孢子萌发成丝状体;3)来自雄叶片体细胞的丝状体途径:F单细胞发育至多细胞团,放散后萌发成丝状体;G经过不断分裂形成愈伤组织,直接形成丝状体;H分裂成2细胞后,一个细胞侧面突起发育成丝状体。  相似文献   

坛紫菜藻红蛋白α,β亚基基因的克隆和序列分析   总被引：1，自引：0，他引：1       下载免费PDF全文

闫国良  杨听林  徐双悦  左正宏  陈瑜芳  陈奕欣 《海洋学报》2007,29(2):167-172

藻胆蛋白(Phycobiliprotein,PBP)是原核藻类和真核藻类进行光合作用的捕光色素蛋白,占藻体干重的2%左右,主要分为3类:藻红蛋白(phycoer-ythrin,PE)、藻蓝蛋白(phycocyanin,PC)和别藻蓝蛋白(allophycocyanin,APC)[1].藻胆蛋白一般由α亚基和β亚基组成,部分藻胆蛋白中还存在γ亚基.一般由α和β亚基形成稳定的单体(αβ),再由单体聚合为多聚体(αβ)_n.从蓝藻和红藻中分离的藻胆蛋白为三聚体(αβ)₃或六聚体(αβ)₆[2].  相似文献   

锌离子(Zn2+)对坛紫菜叶状体光合色素含量的影响     

郭新梅  戴继勋  王娟  徐矫健 《中国海洋大学学报(自然科学版)》2007,37(1):107-110

采用不同浓度Zn2 处理坛紫菜叶状体,用紫外分光光度法,测定了光合色素的含量。研究了金属Zn2 对坛紫菜叶状体中光合色素:叶绿素a、藻红蛋白、藻蓝蛋白和别藻蓝蛋白的影响。结果表明:Zn2 在0.5~5.0μmol/L时,有利于光合色素的合成;但在5μmol/L时,叶绿素a含量开始下降,在Zn2 浓度>10μmol/L时各光合色素含量也随浓度的升高而下降,对光合色素产生毒害作用。除去Zn2 后,都表现出向对照组恢复靠近的趋势,但别藻蓝蛋白的恢复较慢。  相似文献   

Isolated Cells of Porphyra yezoensis Cultured on Solid Medium     

沈颂东  戴继勋 《海洋通报(英文版)》2001,3(1)

Vegetative cells of Porphyra yezoensis are isolated with sea snail enzyme and cultured on the solidified agar medium. The results of experiments show that the isolated cells can survive,divide and regenerate well on the medium solidified with agar. The first division on the solid medium starts after 7 days' culture, 4 days later than the liquid culture. The survival rate of isolated cells is 71.3% on the solid medium, lower than the 86.2% of that in seawater.Thalli, thalloids,conchocelis, spermatangia and multicellular masses are developed on the solid/medium in the first month, slowly but normally. Spermatangia sacs disappear within 4 weeks. Without adding nutrient liquid onto the surface of solid medium or injecting seawater under the agar layer in order to keep moisture, the thalli and cell groups release monospores to form new thalli instead of enlarging their areas after 5 weeks' culturing. Some monospores regenerate new thalli. Other monospores lose their pigments and minimize their volume and divide quickly to form light pink calli. After 16 weeks, numerous calli can be seen on the solid medium and after 24 weeks' culturing, almost only calli and conchocelis can be seen. If the calli are immersed in seawater, the monospores are released and may develop into young thallus.  相似文献