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广东省自然科学基金(1015030101000002)

作品数:2 被引量:11H指数:2
相关作者:黄良民李亚男沈萍萍齐雨藻更多>>
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发文基金:广东省自然科学基金广东省科技计划工业攻关项目国家自然科学基金更多>>
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Phaeocystis globosa Scherffel,a harmful microalga,and its production of dimethylsulfoniopropionate被引量:6
2011年
The production of dimethylsulfoniopropionate (DMSP) and its cleavage products (DMS) are well studied in phytoplankton worldwide. However, less is known about their sources, distributions, and impacts in the coast of China. We examined the production of DMSP and DMS in Phaeocvstis globosa Scherffel and other benthic macroalgae from the South China coast in relation to environmental conditions. P. globosa was a harmful marine microalgal species and its bloom took place in the eutrophic waters along the South China Sea frequently. It also produced high content of DMSP at different growth stages, with the highest concentration usually observed in the stationary period. Moreover, the production of DMSP in P. globosa was significantly affected by salinity and temperature with the highest contents associated with high salinity (e.g. 40) and low temperature (e.g. 20℃). In field benthic macroalgae, there was also a marked difference in the DMSP of various species or different samples of the same species. Chlorophyll a contents were also determined for each macroalgal species. The highest chlorophyll a (238.7 ng/g fresh weight) was recorded in Chlorophyta Ulva lactuca at Guishan Island (Zhuhai), while the lowest value (1.5 ng/g fresh weight) was found in Rhodophyta Gracilaria tenuistipitata in Zhanjiang. Further correlation analysis indicated that there was no significant relationship between the content of DMSP and chl-a in macroalgae samples (P〉 0.05). All the results suggested that the production of DMSP in marine algae was not only species- and stage-related, but also greatly affected by various environmental factors.
沈萍萍齐雨藻王艳黄良民
关键词:DMSPDMSMACROALGAE
棕囊藻的分类及系统进化研究进展被引量:6
2012年
棕囊藻隶属于定鞭藻纲,具有独特的生理、生化及生态学特性,是全球广布的有害有毒赤潮藻类。它是少数具有复杂异型生活史的海洋微藻之一,存在有性生殖过程,具有单细胞和群体两种形态。单细胞又有大动孢子、小动孢子以及非鞭毛细胞几种类型。群体与单细胞之间的相互转化受营养盐、光照、固着基质、水体扰动等因素影响。由于其细胞微小,观察困难,传统的形态特征分类存在较多不足,导致其分类鉴定较为混乱。分子标记技术的应用极大地推动了棕囊藻分子分类及系统进化研究。目前用于棕囊藻分子研究的遗传标记主要有核基因和叶绿体基因。基于核糖体18S rDNA的系统进化研究推测棕囊藻可能是一种暖水起源的全球广布种。Phaeocystis jahnii和Phaeocystis cordata在棕囊藻属中分化较早,推测冷水种约6000万年前从暖水祖先中分化。中国目前共发现棕囊藻7个地理株,关于其种源、传播扩散机制等研究进程缓慢。本文就棕囊藻的生活史、分类、系统进化及中国棕囊藻的地理分布、传播与起源等进行综述,并对今后棕囊藻分类及系统进化研究提出展望。
李亚男沈萍萍黄良民齐雨藻
关键词:棕囊藻生活史地理分布系统进化
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