基于形态和分子数据对湛江海域4个江蓠物种(红藻门)的分类学研究

doi:10.11978/2023085

Abstract

Abstract:

According to the molecular and morphological analysis, the species of Gracilariaceae was studied using the samples collected from Zhanjiang, Guangdong province, China. Four Gracilariaceae species were identified, namely: Gracilaria tenuistipitata, G. firma, G. edulis and Gracilariopsis bailinae. Their taxonomic characters and phylogenetic relationships were discussed in detail. This is combined with data from the literature to clarify that G. tenuistipitata, G. tenuistipitata var. liui and G. longirostris are the same species, and G. firma and G. changii are the same species. This study revised the taxonomic information of Gracilariaceae species in the coastal waters of southern China, and also provided a taxonomic basis for the conservation and development of macroalgae resources in Zhanjiang sea area.

Key words: Zhanjiang sea area, morphology, Gracilaria, phylogenetic analysis

LI Nenghui, HUANG Qing, LI Hang, ZENG Jun, WU Kefeng, TAN Huaqiang. Taxonomic study of four species of Gracilaria (Gracilariaceae, Rhodophyta) in Zhanjiang based on morphological and molecular data[J].Journal of Tropical Oceanography, 2024, 43(2): 34-47.

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References 47

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结构	样品(分枝简单)	样品(分枝繁多)	细基江蓠	细基江蓠繁枝变种
高	20~100cm	20~85cm	20~40cm	20~30cm
宽	0.5~3.6mm	0.5~3mm	0.5~1mm	0.3~0.5mm
表层细胞	1~2层; 5.8~19.6μm × 4.2~11μm	1~2层; 5.8~17.5μm × 5~13μm	1~2层; 15~18μm × 10.5~19.5μm	1~2层; 12~18μm × 10~11μm
内皮层细胞	2~3层; 23.1~84.6μm	2~3层; 23.3~80.4μm	2~3层; 33~83μm	2~4层; 25~80μm
髓部细胞	185~501μm	190~485μm	225~390μm	200~250μm
囊果	595~1780μm	580~1830μm	830~950μm	0.8~1mm
囊果被	6~13层; 厚72~185μm	6~11层; 厚74~200μm	8~11层; 厚72~102μm	7~10层; 厚72~102μm
吸收丝	存在	存在	存在	存在
精子囊	“T”型, 24~50μm × 20~42μm	“T”型, 26~52μm × 18~40μm	“T”型, 19~23μm × 10~23μm	“T”型, 19~23μm × 10~23μm
四分孢子囊	26.8~50.5μm × 18.4~43.2μm	28.5~51.2μm × 16.7~42.5μm	30~46μm × 18~30μm	30~46μm × 18~30μm
参考文献	本文	本文	张峻甫等(1976); 夏邦美(1999)	夏邦美(1999); 丁兰平等(2014)

结构	样品(分枝简单)	样品(囊果长喙)	细基江蓠	长喙江蓠
高	20~100cm	20~74cm	20~40cm	约20cm
宽	0.5~3.6mm	0.5~2.8mm	0.5~1mm	约 1mm
表层细胞	1~2层; 5.8~19.6μm × 4.2~11μm	1~2层; 6~18.5μm × 4.5~12.5μm	1~2层; 15~18μm × 10.5~19.5μm	1~2层; 8~13μm × 7~9μm
内皮层细胞	2~3层; 23.1~84.6μm	2~3层; 20~78.5μm	2~3层; 33~83μm	1~2层; 15~40μm
髓部细胞	185~501μm	185~470μm	225~390μm	70~200μm
囊果	595~1780μm	喙长1.1mm左右	830~950μm	喙长2~3mm
囊果被	6~13层; 厚72~185μm	6~10层; 厚78~180μm	8~11层; 厚72~102μm	4~7层; 厚106~145μm
吸收丝	存在	存在	存在	存在
精子囊	“T”型, 24~50μm × 20~42μm	未发现	“T”型, 19~23μm × 10~23μm	未发现
四分孢子囊	26.8~50.5μm × 18.4~43.2μm	未发现	30~46μm × 18~30μm	20~50μm × 10~36μm
参考文献	本文	本文	张峻甫等(1976); 夏邦美(1999)	夏邦美(1999); 丁兰平等(2014)

结构	样品	张氏江蓠	硬江蓠
高	10~28cm	7~14cm	10~20cm
宽	1.5~4.2mm	0.5~2mm	1~3mm
表层细胞	1~2层; 6.6~13.2μm × 5.2~8.3μm	1~2层; 6.6~9.9μm × 4~6.6μm	2~3层; 6.6~13.2μm × 3.3~6.6μm
内皮层细胞	2~4层; 13~45μm	2~3层; 33~83μm	3~5层; 26~83μm
髓部细胞	300~800μm	300~499μm	230~450μm
囊果	573~1161μm × 778~1600μm	589~664μm × 930~996μm	580~630μm
囊果被	9~13层; 厚108~180μm	10~12层; 厚79~132μm	8~10层; 厚83~95μm
吸收丝	存在	存在	不存在
精子囊	“V”型, 56~102μm × 40~90μm	“V”型, 50μm × 33~36μm; “P”型, 69~76μm × 43~50μm	“V”型, 66~116μm × 33~66μm
四分孢子囊	23~47μm × 13~29μm	10~66μm × 20~40μm	50~66μm × 26~43μm
参考文献	本文	Zhang等(1991)	张峻甫等(1976)

Taxonomic study of four species of Gracilaria (Gracilariaceae, Rhodophyta) in Zhanjiang based on morphological and molecular data

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