Phylogenetic relationships of Rosenvingea (Scytosiphonaceae, Phaeophyceae) from Vietnam based on cox3 and psaA sequences

doi:2014.29.4.289

Algae > Volume 29(4); 2014 > Article

Algae 2014;29(4): 289-297. doi: https://doi.org/10.4490/algae.2014.29.4.289

Kyung Min Lee¹, Dang Diem Hong² and Sung Min Boo¹^,*

¹Department of Biology, Chungnam National University, Daejeon 305-764, Korea
²Algal Biotechnology Department, Institute of Biotechnology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay, Hanoi 10000, Vietnam

*Corresponding Author

Email: smboo@cnu.ac.kr

ABSTRACT

The taxonomic status and the distribution of Rosenvingea species need attention because of the difficulties in morphological identification in the laboratory as well as in the field. We analyzed mitochondrial cox3 and plastid psaA gene sequences from Rosenvingea species from Vietnam, Mexico and Panama in combination with morphological examinations. Our results confirmed the occurrence of R. intricata and R. orientalis in Vietnam. R. intricata formed dense decumbent mats with many flat branches, often inter-adhesive, and was up to 5 cm in diameter. R. orientalis thalli were up to 18 cm long with narrow (less than 2 mm in width) tubular to compressed fronds. Both cox3 and psaA phylogenies revealed the non-monophyly of the genus Rosenvingea, as reported previously for other scytosiphonacean genera.

Key words: brown algae; cox3; Ectocarpales; psaA; Rosenvingea; taxonomy; Vietnam