Phycochemical Investigations on Air-Dried Material of Five Species of Caulerpa (Bryopsidophyceae)
Phycochemical Investigations on Air-Dried Material of Five Species of Caulerpa (Bryopsidophyceae)
复制标题
DOI：
10.1515/botm.1998.41.1-6.125
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
R. Aliya;Mustafa Shameel
中科院分区：
文献类型：
--
作者：
R. Aliya;Mustafa Shameel
五种虹吸管状绿色海藻。C. faridii Nizam。C. manrensis Nizam。， C.总状花序（福斯克）j . Ag)。紫杉树（Vahl） C. Ag。从卡拉奇（巴基斯坦）附近的沿海水域收集，在25°C的阴凉处风干一个月。每个物种在相同温度下提取四周，并使用气相色谱（GLC）、电子冲击（EI-）、快速原子轰炸（FAB-）、场解吸（FD-）、气相色谱（GC-）、高分辨率（HR-）和红外（IR-）质谱（- ms）以及核磁共振（Hand C-NMR）谱分析脂肪酸、甾醇和二萜成分。总共36种酸/。E. 18种饱和脂肪酸和18种不饱和脂肪酸，其中13种为单烯酸，3种为二烯酸，2种为三烯酸。不饱和脂肪酸的含量（52-74%）高于饱和脂肪酸（26-48%）。棕榈酸和肉豆蔻酸是主要的脂肪酸，其中油酸含量很高（8-16.5%），甘油酯酸含量很高（26%）；未检测到长链和Ci6多不饱和脂肪酸。已鉴定出五种不同的甾醇，胆固醇似乎是最丰富的一种，也是除法氏梭菌外四种Caulerpa中唯一的甾醇。胆骨的甾醇似乎是Caulerpa属的特征。从三种植物中分离出两种二萜，均为无环二萜醇。这是首次从蕨属植物中发现。这5个种在植物化学上有许多不同之处。
Five siphonaceous green seaweeds, Caulerpa chemnitzia (Esper) Lamour., C. faridii Nizam., C. manorensis Nizam., C. racemosa (Forssk.) J. Ag., and C. taxifolia (Vahl) C. Ag. were collected from the coastal waters near Karachi (Pakistan) and air-dried in the shade at 25 °C for one month. Each species was extracted for four weeks at the same temperature and analyzed for fatty acid, sterol and diterpene constituents using gasliquid chromatography (GLC), electron impact (EI-), fast atom bombardement (FAB-), field desorption (FD-), gas chromatography (GC-), high resolution (HR-) and infrared (IR-) mass spectrometry (-MS) as well as nuclear magnetic resonance ('Hand C-NMR) spectroscopy. Altogether 36 acids /. e. 18 saturated and 18 unsaturated fatty acids including 13 monoenoic, 3 dienoic and 2 trienoic acids were identified as methyl esters. Unsaturated fatty acids were present in a greater quantity (52-74%) than saturated acids (26-48%). Palmitic and myristoleic acids were found as major fatty acids, oleic acid was present in high amounts (8-16.5%) in some of them and gadoleic acid at very high levels (26%) in one species; longer-chain and Ci6 polyunsaturated fatty acids were not detected. Five different sterols have been identified, cholesterol appeared to be the most abundant one and was the only sterol in four Caulerpa species, except C. faridii. Sterols of the cholesta-skeleton appear to be characteristic of the genus Caulerpa. Two diterpenoids have also been isolated from three species, both being acyclic diterpene alcohols. They are being reported for the first time from any species of Caulerpa. The five species of Caulerpa differed from one another phycochemically in many different aspects.