Batrachospermaceae is an important group of freshwater red algae.Available data of the latitude,longitude,and environmental factors on Batrachospermaceae distribution in Asia were analyzed to understand the geographic...Batrachospermaceae is an important group of freshwater red algae.Available data of the latitude,longitude,and environmental factors on Batrachospermaceae distribution in Asia were analyzed to understand the geographical distribution of Batrachospermaceae genera in Asia.Statistical analyses,including one-way ANOVA,correlation analysis,stepwise regression analysis,principal component analysis,and linear discriminant analysis were conducted to characterize variation in geographical distribution and growth environment.Results reveal high variation in geographical distribution and growth environment among different Batrachospermaceae genera in Asia.Specifically,correlations between latitude and all environmental factors exclusive of altitude are significant,and longitude is significantly correlated with all environmental factors except for average relative humidity.The geographical distribution and growth environment of different Batrachospermaceae genera significantly differed.Altitude,maximum temperature,average temperature,minimum temperature,average relative humidity,average wind speed,maximum wind speed,and atmospheric pressure all contributed to explaining differences in the geographical distribution of Batrachospermaceae genera.Combining the results of correlation analysis,stepwise regression analysis,and principal component analysis,all environmental factors contributed to the different geographical distribution of Batrachospermum,Paludicola,Sheathia,Sirodotia,and Remainder(the rest),all environmental factors but atmospheric pressure contributed to the different geographical distribution of Kumanoa,and all environmental factors but average wind speed and maximum wind speed contributed to the different geographical distribution of Virescentia.However,the correlation between these significantly related environmental factors and taxa is not necessarily causative,and many other environmental factors,such as temperature,pH,conductivity,shading,current velocity,dissolved oxygen,hardness,substrata types,and nutrients etc.,are likely to have an important impact on the geographical distribution of taxa,which is an important topic for future research.展开更多
为探讨不同季节以及不同地点采集的浒苔其多糖理化性质差异,采用水提醇沉法对黄海海域青岛沿海春(原料1)秋(原料3)两季采集的浒苔、2008年夏季爆发浒苔(原料2)以及东海海域福建沿海采集的浒苔(原料4)的多糖进行了提取,得到了4种冷水提...为探讨不同季节以及不同地点采集的浒苔其多糖理化性质差异,采用水提醇沉法对黄海海域青岛沿海春(原料1)秋(原料3)两季采集的浒苔、2008年夏季爆发浒苔(原料2)以及东海海域福建沿海采集的浒苔(原料4)的多糖进行了提取,得到了4种冷水提取多糖PC1-4和4种热水提取多糖PH1-4。分别对8种浒苔多糖利用Q-Sepharose Fast Flow离子交换色谱法纯化后得到了12个组分。对各组分的总糖含量、糖醛酸含量、硫酸根含量以及蛋白含量进行了测定,利用气相色谱法测定了单糖组成,结果显示不同季节不同海域采集样品的化学组成及单糖组成不同。展开更多
在2011-2013年间对粤东地区进行了20余次野外大型海藻资源调查，采集了大量标本。利用形态特征，对部分标本进行了分类学研究。经鉴定，标本中包含江蓠属5个种及变种，即芋根江蓠Gracilaria blodgettii Harvey、异枝江蓠G. bailinae Cha...在2011-2013年间对粤东地区进行了20余次野外大型海藻资源调查，采集了大量标本。利用形态特征，对部分标本进行了分类学研究。经鉴定，标本中包含江蓠属5个种及变种，即芋根江蓠Gracilaria blodgettii Harvey、异枝江蓠G. bailinae Chang et Xia、细基江蓠G. tenuistipitata Chang et Xia、细基江蓠繁枝变种G. tenuistipitata var. liui Zhang et Xia、长喙江蓠G. longirostris Zhang et Wang。它们的主要鉴定特征分别为：芋根江蓠的分枝基部明显缢缩；异枝江蓠的藻体暗绿色，初级分枝围绕主轴互生、偏生或叉分；细基江蓠的藻体主轴基部纤细，分枝简单；细基江蓠繁枝变种的藻体纤细，分枝繁多；长喙江蓠的囊果具有明显的长喙状突起。其中，芋根江蓠和异枝江蓠在粤东地区属首次报道，文章对其进行了较详细的介绍。该研究结果丰富了粤东江蓠属的物种多样性，为粤东地区江蓠属物种资源的保护和利用提供了分类学依据。展开更多
在实验室条件下对亚洲蜈蚣藻（Grateloupia asiatica Kawaguchi et Wang）的孢子发育进行了研究，同时探讨了温度（5-30℃）和光照强度（10~200μmol．m^-2·s^-1）对孢子发育的影响；追踪观察了生活史的各个阶段．结果表明：（1）...在实验室条件下对亚洲蜈蚣藻（Grateloupia asiatica Kawaguchi et Wang）的孢子发育进行了研究，同时探讨了温度（5-30℃）和光照强度（10~200μmol．m^-2·s^-1）对孢子发育的影响；追踪观察了生活史的各个阶段．结果表明：（1）亚洲蜈蚣藻的孢子发育类型为“间接盘状体”型（有丝状体出现）；（2）孢子发育和盘状体生长的最适温度为25℃；（3）光照强度（80μmol．m^-2·s^-1）条件下孢子的发育和盘状体生长速度最快；（4）生活史由果孢子体、配子体及四分孢子构成，孢子体和配子体在形态上相同，属于同型世代交替．展开更多
通过形态观察和分子分析相结合的方法,对青岛(模式标本产地)产的帚状蜈蚣藻(Grateloupia fastigiata Li et Ding)进行了重新鉴定,结果表明:1藻体为深紫红色,高9—26 cm,基部呈圆柱状,1—2回不规则羽状分枝,皮层厚度为85—160μm,由8—1...通过形态观察和分子分析相结合的方法,对青岛(模式标本产地)产的帚状蜈蚣藻(Grateloupia fastigiata Li et Ding)进行了重新鉴定,结果表明:1藻体为深紫红色,高9—26 cm,基部呈圆柱状,1—2回不规则羽状分枝,皮层厚度为85—160μm,由8—11层细胞构成;助细胞生殖枝丛为典型的Grateloupia型,果胞枝生殖枝丛主枝由6个细胞组成,辅助细胞生殖枝丛主枝由5个细胞组成(6cpb-5auxb型),与亚洲蜈蚣藻(G.asiatica Kawaguchi et Wang)一致。2基于rbc L基因序列构建的系统树显示:本研究的10个帚状蜈蚣藻样本与青岛产的亚洲蜈蚣藻之间无碱基差异,形成独立的进化支,与大连石槽、石庙子产的亚洲蜈蚣藻的碱基差异均为1 bp(0.08%),与日本、韩国产的亚洲蜈蚣藻的碱基差异分别为2 bp(0.16%)、3 bp(0.24%),均属于种内差异,与Grateloupia clade I中蜈蚣藻属内其他种的碱基差异为18(1.47%)—76 bp(6.19%),均属于种间差异。通过形态观察和rbc L基因序列分析,认为帚状蜈蚣藻与亚洲蜈蚣藻为同一种,将帚状蜈蚣藻作为亚洲蜈蚣藻的异名。展开更多
基金Supported by the National Natural Science Foundation of China(Nos.32170204,41871037 to Shulian XIE and No.31800172 to Fangru NAN)。
文摘Batrachospermaceae is an important group of freshwater red algae.Available data of the latitude,longitude,and environmental factors on Batrachospermaceae distribution in Asia were analyzed to understand the geographical distribution of Batrachospermaceae genera in Asia.Statistical analyses,including one-way ANOVA,correlation analysis,stepwise regression analysis,principal component analysis,and linear discriminant analysis were conducted to characterize variation in geographical distribution and growth environment.Results reveal high variation in geographical distribution and growth environment among different Batrachospermaceae genera in Asia.Specifically,correlations between latitude and all environmental factors exclusive of altitude are significant,and longitude is significantly correlated with all environmental factors except for average relative humidity.The geographical distribution and growth environment of different Batrachospermaceae genera significantly differed.Altitude,maximum temperature,average temperature,minimum temperature,average relative humidity,average wind speed,maximum wind speed,and atmospheric pressure all contributed to explaining differences in the geographical distribution of Batrachospermaceae genera.Combining the results of correlation analysis,stepwise regression analysis,and principal component analysis,all environmental factors contributed to the different geographical distribution of Batrachospermum,Paludicola,Sheathia,Sirodotia,and Remainder(the rest),all environmental factors but atmospheric pressure contributed to the different geographical distribution of Kumanoa,and all environmental factors but average wind speed and maximum wind speed contributed to the different geographical distribution of Virescentia.However,the correlation between these significantly related environmental factors and taxa is not necessarily causative,and many other environmental factors,such as temperature,pH,conductivity,shading,current velocity,dissolved oxygen,hardness,substrata types,and nutrients etc.,are likely to have an important impact on the geographical distribution of taxa,which is an important topic for future research.
文摘为探讨不同季节以及不同地点采集的浒苔其多糖理化性质差异,采用水提醇沉法对黄海海域青岛沿海春(原料1)秋(原料3)两季采集的浒苔、2008年夏季爆发浒苔(原料2)以及东海海域福建沿海采集的浒苔(原料4)的多糖进行了提取,得到了4种冷水提取多糖PC1-4和4种热水提取多糖PH1-4。分别对8种浒苔多糖利用Q-Sepharose Fast Flow离子交换色谱法纯化后得到了12个组分。对各组分的总糖含量、糖醛酸含量、硫酸根含量以及蛋白含量进行了测定,利用气相色谱法测定了单糖组成,结果显示不同季节不同海域采集样品的化学组成及单糖组成不同。
文摘在2011-2013年间对粤东地区进行了20余次野外大型海藻资源调查，采集了大量标本。利用形态特征，对部分标本进行了分类学研究。经鉴定，标本中包含江蓠属5个种及变种，即芋根江蓠Gracilaria blodgettii Harvey、异枝江蓠G. bailinae Chang et Xia、细基江蓠G. tenuistipitata Chang et Xia、细基江蓠繁枝变种G. tenuistipitata var. liui Zhang et Xia、长喙江蓠G. longirostris Zhang et Wang。它们的主要鉴定特征分别为：芋根江蓠的分枝基部明显缢缩；异枝江蓠的藻体暗绿色，初级分枝围绕主轴互生、偏生或叉分；细基江蓠的藻体主轴基部纤细，分枝简单；细基江蓠繁枝变种的藻体纤细，分枝繁多；长喙江蓠的囊果具有明显的长喙状突起。其中，芋根江蓠和异枝江蓠在粤东地区属首次报道，文章对其进行了较详细的介绍。该研究结果丰富了粤东江蓠属的物种多样性，为粤东地区江蓠属物种资源的保护和利用提供了分类学依据。
文摘在实验室条件下对亚洲蜈蚣藻（Grateloupia asiatica Kawaguchi et Wang）的孢子发育进行了研究，同时探讨了温度（5-30℃）和光照强度（10~200μmol．m^-2·s^-1）对孢子发育的影响；追踪观察了生活史的各个阶段．结果表明：（1）亚洲蜈蚣藻的孢子发育类型为“间接盘状体”型（有丝状体出现）；（2）孢子发育和盘状体生长的最适温度为25℃；（3）光照强度（80μmol．m^-2·s^-1）条件下孢子的发育和盘状体生长速度最快；（4）生活史由果孢子体、配子体及四分孢子构成，孢子体和配子体在形态上相同，属于同型世代交替．
