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Detail description of Lithophyllum okamurae(Lithophylloideae,Corallinales), a widely distributed crustose coralline alga in marine ecosystems

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Acta Oceanologica Sinica 2020年第6期39卷 96-106页

作者： Qunju Hu Fangfang Yang Zhangliang Wei Jiahao Mo Chao Long Xinpeng Tian Lijuan Long CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China

Lithophyllum okamurae is one of the important encrusting coralline algae,which plays important roles as primary producer,carbonate sediment builder,and habitat provider in the marine *** this study,*** was collected from tropical coast of Sanya,and firstly described based on both detailed morph-anatomical characteristics and molecular studies of typic DNA *** structure of the thalli of *** was pseudoparenchymatous construction with radially organized dimerous organizations in the crustose *** pseudoparenchymatous construction were composed of three parts,including 1 to 3 layers of epithelia cells which had flatten to round outermost walls,one layer of square or rectangular cells of the hypothallia and multiple layers of square or elongated rectangular peripheral *** cells were observed,and the cells of the contiguous vegetative filaments were connected by secondary pit-connections with cell fusions *** carposporangial conceptacles,the spermatangial conceptacles,the bisporangial conceptacles and the tetrasporangial conceptacles were observed,and all these four kinds of conceptacles were *** spermatangial conceptacles were slightly convex and buried at shallow depths in the thalli tissues,and the carposporangial conceptacles and asexual conceptacles were protruding and *** studies based on DNA barcoding markers of 18 S rDNA,COI,rbc L and psb A revealed that *** clustered with the closest relation of ***,and formed a distinct *** on the comparative anatomical features and the molecular data,the detailed description of the valid species of *** was firstly given in this study to provide theoretical basis for algae resources utilization and conservation in marine ecosystems.

关键词： Lithophyllum okamurae crustose coralline algae marine ecosystem morphological characteristics conceptacles DNA-barcoding

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Early Development of Silvetia babingtonii(Fucales, Phaeophyceae)

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Journal of Ocean University of China 2014年第4期13卷 677-682页

作者： WANG Gaoge WEI Xiaojiao SHUAI Limei LU Bojun WANG Shasha KANG Dongdong College of Marine Life Sciences Ocean University of China Helmholtz-Zentrum für Ozeanforschung Kiel (GEOMAR) Düsternbrooker Weg 20 24105 KielGermany

Silvetia babingtonii is a potentially economic brown alga for sources of food and high-value added utilization. So far, sporeling nursery and field cultivation has not been successful. The lack of knowledge on development and life cycle of this alga hinder the development of techniques for the sporeings and cultivation. In this study, internal structure of oogonium and antherium of S. babingtonii was observed with hematoxylin and eosin staining and through microscope. Meanwhile, early development from zygotes to juvenile sporelings was studied at 20℃ under 60–100 μmol photons m-2 s-1. Zygotes germinated and divided into thallus and rhizoid cells. The larger thallus cells further divided and developed into juvenile sporelings; while the smaller rhizoid cells divided and elongated into rhizoid hairs. These findings documented the life cycle of S. babingtonii and provided fundamental knowledge for sporeling nursery in the near future.

关键词： Silvetia babingtonii conceptacles early development life cycle receptacles

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