中国石莼属海藻新记录种——大野石莼(Ulva ohnoi)的形态与多基因标记分析

doi:10.11978/2025050

热带海洋学报 ›› 2025, Vol. 44 ›› Issue (6): 64-73.doi: 10.11978/2025050CSTR: 32234.14.2025050

中国石莼属海藻新记录种——大野石莼(Ulva ohnoi)的形态与多基因标记分析

曾昭钧(), 谢恩义, 崔建军()

广东海洋大学, 广东湛江 524088

收稿日期:2025-04-01 修回日期:2025-05-06 出版日期:2025-11-10 发布日期:2025-12-03
通讯作者: 崔建军。email: cuijianjun29@163.com
作者简介:
曾昭钧(2001—), 男, 广西壮族自治区南宁市人, 硕士研究生, 从事大型海藻资源开发与利用研究。email: zeng200138@163.com
基金资助:
国家重点研发计划项目(2024YFD2401804); 国家重点研发计划项目(2022YFD2401303); 宁波2023重大科技攻关暨揭榜挂帅项目(2023Z118)

A newly recorded species of Ulva in China: morphological and multi-gene marker analysis of Ulva ohnoi

ZENG Zhaojun(), XIE Enyi, CUI Jianjun()

Guangdong Ocean University, Zhanjiang 524088, China

Received:2025-04-01 Revised:2025-05-06 Online:2025-11-10 Published:2025-12-03
Contact: CUI Jianjun. email: cuijianjun29@163.com
Supported by:
National Key R&D Program of China(2024YFD2401804); National Key R&D Program of China(2022YFD2401303); 2023 Major Science and Technology Research and Launch Project of Ningbo City(2023Z118)

摘要/Abstract

摘要：

本文报道了采自广西防城港和广东湛江的中国石莼属海藻一新记录种——大野石莼Ulva ohnoi Hiraoka & S.Shimada 2004, 详细描述了其形态特征并进行了多基因标记分析。结果表明, 大野石莼具固着个体和漂浮个体, 藻体呈浅绿色, 长15~60cm, 单生或丛生, 质脆, 易撕裂, 外观呈圆形、长卵形或不规则形; 藻体细胞表面观呈方形或多边形, 不规则排列, 边缘具齿状凸起; 藻体上部和中部相似, 细胞尺寸为10~20µm×5~15µm, 厚度为20~45µm; 藻体基部细胞近圆形, 尺寸为10~30µm×10~22µm, 基部厚度为70~90µm。rbcL和tufA基因序列分析结果显示, 采集的样本均与GenBank中的大野石莼序列聚在一支, 有高Bootstrap值与后验概率支持, 彼此间遗传距离为0~0.1%。本研究丰富了我国石莼属的物种多样性, 强调了分子生物学技术在绿藻物种鉴定中的重要性, 为我国海藻资源保护及利用提供了基础分类学资料。

关键词: 大野石莼, 新记录种, 形态, 多基因标记, rbcL, tufA

Abstract:

This study presents a newly recorded species of the Ulva algae in China, Ulva ohnoi Hiraoka & S. Shimada 2004, collected from Fangchenggang (Guangxi) and Zhanjiang (Guangdong). Detailed morphological characteristics were described, accompanied by a multi-gene marker analysis. The results indicate that Ulva ohnoi exhibits both attached and floating forms. The thalli are light green, 15-60 cm in length, solitary or tufted. The tissue is brittle and easily torn, displaying round, ovate, or irregular shapes. The thallus surface cells are square or polygonal, arranged irregularly, with jagged protrusions along the edges. The upper and middle parts of the thallus are similar, with cell dimensions of 10-20 μm×5-15 µm and a thickness of 20-45 µm. In contrast, the basal cells are nearly round, measuring 10-30 μm×10-22 µm, with a thickness of 70-90 µm. Analysis of the rbcL and tufA gene sequences revealed that the samples collected in this study are genetically identical to the type specimens of Ulva ohnoi, supported by high bootstrap values and posterior probabilities. This study enriches the species diversity of the Ulva genus in China, underscores the significance of molecular biology techniques in identifying green algae species, and provides essential taxonomic data for the conservation and utilization of marine algae resources in China.

Key words: Ulva ohnoi, newly recorded species, morphology, multi-gene markers, rbcL, tufA

中图分类号:

Q949.21

曾昭钧, 谢恩义, 崔建军. 中国石莼属海藻新记录种——大野石莼(Ulva ohnoi)的形态与多基因标记分析[J]. 热带海洋学报, 2025, 44(6): 64-73.

ZENG Zhaojun, XIE Enyi, CUI Jianjun. A newly recorded species of Ulva in China: morphological and multi-gene marker analysis of Ulva ohnoi[J]. Journal of Tropical Oceanography, 2025, 44(6): 64-73.

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基因区域	引物名称及序列	参考文献
rbcL	RH1 (5′-ATGTCACCACAAACAGAAACTAAAGC-3′) 1385r (5′-AATTC AAATTTAATTTCTTTCC-3′)	Manhart, 1994
tufA	tufGF4 (5′-GGNGCNGC NCAAATGGAYGG-3′) tufAR (5′-CCTTCNCGAATMGCRAAWCGC-3′)	Famà et al, 2002

基因区域	预变性	变性	退火	延伸	循环数	最终延伸
rbcL	95℃ 6min	95℃ 1min	45℃ 1min	72℃ 1min	35	72℃ 10min
tufA	94℃ 4min	95℃ 1min	45℃ 30s	72℃ 1min	35	72℃ 7min

样本编码	采集地点	采集日期	rbcL基因序列号	tufA基因序列号
FCG001	广西防城港	2025-3-1	PV282387	/
FCG002	广西防城港	2025-3-1	PV282388	PV366677
FCG003	广西防城港	2025-3-1	PV282389	PV366678
FCG004	广西防城港	2025-3-1	/	/
ZJ001	广东湛江	2024-3-25	PV282390	/
ZJ002	广东湛江	2025-3-4	PV282391	PV366679
ZJ003	广东湛江	2025-3-4	/	PV366680
ZJ004	广东湛江	2025-3-4	/	PV366681
ZJ005	广东湛江	2025-3-4	/	PV366682
ZJ006	广东湛江	2025-3-4	/	PV366683
注: “/”表示序列未扩增成功。

中国石莼属海藻新记录种——大野石莼(Ulva ohnoi)的形态与多基因标记分析

A newly recorded species of Ulva in China: morphological and multi-gene marker analysis of Ulva ohnoi

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