| 摘要: |
| 真丝藻属Eudesme是J.Agandh于1880年(J.Agardh 1880，p.29)建立的。其主要特征为：次生基部由直立初生中央轴及假根状丝体组成；初生中央轴由几个丝体束构成；假根状丝体则由中央丝体的基部产生；中央轴多管状，合轴分枝，由纵向排列的丝体组成，排列比较疏松；内皮层细胞从中央轴横向长出，稍网状排列；同化丝由内皮层末端细胞产生，不分枝，有密集的载色体；毛透明，从生长点或皮层丝体的基部产生；单室孢子囊无柄或在皮层丝体上有柄。
中国真丝藻，仅Lu Baoren和C.K. Tseng(1983)在“Common Seaweeds of China”中对Eudesme virescens(Cam.)J.Ag.作过描述外，未见其他更详细的报道。经过最近几年本文作者的研究发现中国真丝藻共有4种，除了Eudesme virescens(Cam.)J.Ag.外，另外还有黄海真丝藻Eudesme huanghaiensis Ding et Lu、青岛真丝藻 Eudesme qingdaoensis Ding et Lu和山东真丝藻Eudesme shandongensis Ding et Lu3种。 |
| 关键词: 真丝藻属 形态 区分 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第4404号。国家自然科学基金重大项目B80981816资助。 |
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| A TAXONOMIC STUDY OF THE GENUS EUDESME J.AG. (CHORDARIALES PHAEOPHYTA) FROM THE CHINA |
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DING Lanping, LU Baoren, HUANG Bingxin, ZENG Chengkui
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Institute of Oceanology, The Chinese Academy of Sciences
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| Abstract: |
| The species of the genus Eudesme from the China are studied. There are four species in China, Eudesme virescens (Carm.) J.Ag., Eudesme huanghaiensis Ding et Lu, E.qingdaoensis Ding et Lu and E.shandongensis Ding et Lu. Their morphological features and geographical distributions are discussed, a key to the species from China is provided. E.virescens is characterized by frond being 10-20 cm in height or more, 2-5 mm in diameter, solid in center, its subcortical cells being cylindrical or ellipsoidal. E.huanghaiensis is characterized by frond being 5-20 cm in height, 1.5-3.0 mm in diameter, solid, spherical subcortical cells and rhizoidal filaments developed from the basal cells of subcortex. E.gingdaoensis is characterized by frond being 10 cm in height, hollow in center, 2.5 mm in diameter, 90-230 μm long medullary cells, thin medullary wall, long and slender terminal cell of rhizoidal filaments. E.shandongensis is characterized by frond being 18-25 cm in height, hollow in center, 1.0-1.5 mm in diameter, 80-195 μm long medullary cells slightly thick medullary wall, spherical terminal cell of rhizoidal filaments. All specimens studied are preserved in the Herbarium of the Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China. |
| Key words: Eudesme geographical distribution |
