海南省4种江蓠属(红藻门)海藻的形态分类学研究
作者简介:李永梅(1993—), 女, 硕士研究生, 主要从事海藻分类研究。E-mail: 1312380558@qq.com
收稿日期: 2017-11-03
要求修回日期: 2017-12-07
网络出版日期: 2018-07-16
基金资助
国家自然科学基金(31670199、31400186);天津师范大学人才引进项目(2016);天津市教委科研计划项目(JW1705)
Morphological taxonomy of four species of genus Gracilaria (Gracilariaceae, Rhodophyta) from Hainan Province, China
Received date: 2017-11-03
Request revised date: 2017-12-07
Online published: 2018-07-16
Supported by
National Natural Science Foundation of China (31670199, 31400186);Talent Introduction Projects of Tianjin Normal University (2016);Scientific Research Plan of Tianjin Municipal Education Committee (JW1705)
Copyright
利用形态学和解剖学方法, 对采自海南省东南和西南沿海的大型海洋红藻江蓠属(Gracilaria)进行了分类学研究。经鉴定, 共发现4个物种, 即凤尾菜G. eucheumoides、芋根江蓠G. blodgettii、缢江蓠G. salicornia和刺边江蓠G. spinulosa。文章对此4种江蓠的内、外部形态特征进行了较详细描述与介绍。结合生物冷冻切片技术, 获得了各个物种的比较清晰的解剖学特征图片。其中, 缢江蓠藻体表面瘤状突出物, 与其他文献报道的同体蓠生藻Gracilariophila deformans Weber-van Bosse相一致。
李永梅 , 刘瑞 , 杨楠 , 丁兰平 , 黄冰心 , 王艺晓 , 陈彦伟 . 海南省4种江蓠属(红藻门)海藻的形态分类学研究[J]. 热带海洋学报, 2018 , 37(4) : 29 -37 . DOI: 10.11978/2017118
According to the morphological and anatomical procedures, the marine red algal genus Gracilaria was studied using the samples collected from the southeastern coast of Hainan province, China. Four species were identified, namely, Gracilaria eucheumoides, G. blodgettii, G. salicornia, and G. spinulosa. Their morphological characteristics were described in detail. Combined with the Cryo-sectioning Technique, the anatomical figures of all species were obtained, including distinctive cystocarps of Gracilariophila deformans on G. salicornia. These findings provide science and technology support for the protection and utilization of these resources in Hainan province, China.
Key words: Hainan province; Rhodophyta; Gracilaria; Morphology
Fig. 1 Gracilaria spinulosa. a, b. the habit sketch of the frond; c. the blade margin; d. the surface of the cystocarps; e~g. the transection of the frond; h. the longitudinal section of the cystocarp; i. the longitudinal section of the pericarp; j. the longitudinal section of the pericarp showing the plasmodesmus; k. the carpospores; l. the traversing filaments; m. the floridean starch图1 刺边江蓠 囊果近球形, 散生于叶片两侧, 基部缢缩( |
Fig. 2 Gracilaria eucheumoides. a. the habit sketch of the frond; b. the upper portion of the branchlets; c. the surface of the frond; d~f. the transection the frond; g, h. the transection of the tetrasporangi图2 凤尾菜 藻体内部, 体表胶质层厚2~6μm, 皮层细胞2~5层, 表层细胞长圆形(7~14)μm×(3~5)μm。内皮层细胞近圆形, 直径5~10μm, 皮层细胞间可见连丝。髓部细胞较大, 近圆形, 直径80~200μm ( |
Fig. 3 Gracilaria salicornia. a. the habit sketch of the frond; b. the upper portion of the branchlets; c. the Gracilariophila deformans and its cystocarps; d. the transection of the frond by the razor; e. the longitudinal section of the cystocarp of Gracilariophila deformans; f. the longitudinal section of the pericarp of Gracilariophila deformans; g. the longitudinal section of the pericarp of Gracilariophila deformans show carpospares; h. the longitudinal of the frond; i, j. the transection of the frond; k. the transection of the tetrasporangia图3 缢江蓠 藻体内部由皮层和髓部细胞构成, 细胞15层, 髓部细胞很大, 直径350~600μm, 液浸样品徒手切成3mm厚的切片, 亚甲基蓝染色, 肉眼即可见髓部细胞。皮层细胞2~3层, (6~10)μm×(6~8)μm; 内皮层细胞长圆形, (10~20)μm×(30~55)μm ( |
Fig. 4 Gracilaria blodgettii. a. the habit sketch of the frond; b. the middle portion of the branchlets; c. the blunt top; d, e. the surface of the cystocarp; f. the transection of the frond; g. the transection of the tetrasporangia; h, i. the longitudinal section of the cystocarp; j. the carpospores; k, l. the longitudinal section of the pericarp; m. the traversing filaments图4 芋根江蓠 藻体内部的胶质层厚4~9μm ( |
Tab. 1 Comparison of characteristics of G. glomerata and G. spinulosa表1 刺边江蓠和团集江蓠的比较 |
结构 | 物种 | ||
---|---|---|---|
刺边江蓠 | 团集江蓠 | 样品 | |
高 | 6~11.5cm | 4~4.5cm | 2.5~4cm |
宽 | 0.5~1.2cm | 1~2mm | 1.5~6mm |
体厚 | 415~448μm | 448~481μm | 330~450μm |
胶质层 | 6~9μm | 6~9μm | 6~11μm |
表层细胞 | 2层; (7~10)μm×(3~7)μm | 1~2层; (3~6.6)μm×(5~6)μm | 1~2层; (4~8.5)μm×(5.5~8.5)μm |
内皮层细胞 | 20~40μm | (20~26)μm×(17~20)μm | (17~20)μm×(19~26)μm |
髓部细胞 | 直径132μm; 厚约6μm | (79~145)μm×(73~112)μm; 厚3.3μm | (76~150)μm×(85~170)μm |
囊果 | 1.2mm×1.6mm | 未见 | (1~1.5)mm×(0.8~1.1)mm |
囊果被 | 12~14层; 厚332~415μm | 未见 | 9~12层; 厚110~280μm |
果孢子 | 17~23μm | 未见 | 10~30μm |
The authors have declared that no competing interests exist.
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