Morphology and Nuclear Small-subunit rDNA Sequences of Ishige (Ishigeaceae, Phaeophyceae) and its Phylogenetic Relationship among Selected Brown Algal Orders
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Abstract
Morphology and nuclear small-subunit (SSU) rDNA sequences from Ishige okamurae Yendo and I. sinicola (Setchell et Gardner) Chihara were investigated to describe their species and to infer their phylogenetic relationships within the Chordariales. Ishige okamurae has a narrower frond, a thicker cortical layer, acute apice and rough superficial arrangement in SEM in contrast to I. sinicola. These morphological differences were supported by the partial SSU sequence differences of 28 base pairs between two species. Ishige species were clearly distinguished from other chordarialean taxa by having inconspicuous apical meristematic cells, terminal unilocular sporangia, only coalescent determinate filaments and hairs from cryptostomata. Consistent with morphological observations, our SSU data indicated that Ishige might form an independent lineage with some possible affinities for the early lineage of the Ectocarpales sensu lato.
Copyright © 2003 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Comparative Morphology and Taxonomy of Sphacelaria Species with Tribuliform Propagules (Sphacelariales, Phaeophyceae)
- Reproductive Strategies of Ceramium tenuicorne Near Its Inner Limit in the Brackish Baltic Sea
- Dinoflagellate Cysts in Recent Sediments from Bahía Concepción, Gulf of California
- Occurrence of Carrageenan Structure in an Agar from the Red Seaweed Digenea simplex (Wulfen) C. Agardh (Rhodomelaceae, Ceramiales) with a Short Review of Carrageenan-Agarocolloid Hybrid in the Florideophycidae
- An Updated and Annotated List of Marine Brown Algae (Phaeophyceae) of the Caribbean Coast of the Republic of Panama
- Influence of the Plume of the River Po on the Distribution of Subtidal Microphytobenthos in the Northern Adriatic Sea
- Structural Analysis of Carrageenan from Farmed Varieties of Philippine Seaweed
- Morphology and Nuclear Small-subunit rDNA Sequences of Ishige (Ishigeaceae, Phaeophyceae) and its Phylogenetic Relationship among Selected Brown Algal Orders
- A Molecular Investigation of Mazzaella (Gigartinales, Rhodophyta) Morphologically Intermediate Between Mazzaella linearis and M. splendens
- Meetings
