广东省淡水红藻弯枝藻属一种(Compsopogon sp.)的形态描述及分类地位探讨  

Morphological Description and Taxonomy of Compsopogon sp.(Compsopogonaceae,Rhodophyta) from Guangdong Province

作　　者：潘鸿[1,2] 杨扬[2] 唐宇宏[3] 

机构地区：[1]遵义医学院公共卫生学院,贵州遵义563003 [2]暨南大学水生生物研究中心,广州510632 [3]遵义医学院管理学院,贵州遵义563003

出　　处：《植物科学学报》2013年第6期540-544,共5页Plant Science Journal

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07211-009)

摘　　要：2009年8月在广东省龙川县定南水河采集到一份弯枝藻属的标本，其形态特征介于弯枝藻（Compsopogon caeruleus）和疏枝弯枝藻（Csparsus）之间。植物体株高10～18cm，主轴直径180～270μm，微收缢；中轴细胞近球形和扁球形，横壁收缢明显，直径150-200μm，高100～110μm；皮层细胞1层，中轴细胞缢缩处为2—3层；多角形或卵形，长25~35μm，直径20-25μm；分枝直出至侧生，某些基部细胞特化为假根；分枝顶端渐尖、急尖或二叉状；单孢子球形，直径10—14μm。该标本可能为弯枝藻和疏枝弯枝藻在演化过程中的一种过渡类型。Compsopogon specimens were collected in Dingnanshui River from Longchuan County, Guangdong Province in August 2009. The morphological characters of the specimen were similar to Compsopogon caeruleus and C. sparsus. Plants were 10-18 cm high and 180-270μm in diameter, main axes were slight constricted. Axial cells were nearly spherical and spheroidic, 100-110 μm high and 150-200 μm in diameter. Cross wall was constricted apparently. Cortical cells were one layered while 2-3 layered at constricted axial cells, polygonal or ovoid shaped, 25-35μm long, 20-25μm in diameter. Branching horizontal and lateral, some basal cells specialized as rhizoid on the plants. Apex of branches acuminate, acute or binary. Monosporangia spherical, 10-14 μm in diameter. The specimen may be a transitive type of C. caeru/eus and C. sparsus in evolution.

关 键 词：形态特征 分类地位 弯枝藻属 广东 

分 类 号：Q949.21[生物学—植物学]