Diversity of freshwater red algae (Rhodophyta) in Malaysia and Indonesia from morphological and molecular data

Johnston, Emily T.; Lim, Phaik-Eem; Buhari, Nurliah; Keil, Emily J.; Djawad, Iqbal; Vis, Morgan L.

doi:10.2216/13-223.1

Cited by 40 publications

(49 citation statements)

References 28 publications

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“…The specimen from Indonesia (ID) had assimilatory filament dimensions, thallus diameter, medulla diameter, and cell length and diameter similar to those in the protologue of N. shawii (Table ), consistent with the findings of Johnston et al. (). However, the measurements from specimens in Nepal (NP) in Necchi et al.…”

Section: Resultssupporting

confidence: 85%

Three gene phylogeny of the Thoreales (Rhodophyta) reveals high species diversity

Johnston

Dixon

West

et al. 2018

Journal of Phycology

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The freshwater red algal order Thoreales has triphasic life history composed of a diminutive diploid "Chantransia" stage, a distinctive macroscopic gametophyte with multi-axial growth and carposporophytes that develop on the gametophyte thallus. This order is comprised of two genera, Thorea and Nemalionopsis. Thorea has been widely reported with numerous species, whereas Nemalionopsis has been more rarely observed with only a few species described. DNA sequences from three loci (rbcL, cox1, and LSU) were used to examine the phylogenetic affinity of specimens collected from geographically distant locations including North America, South America, Europe, Pacific Islands, Southeast Asia, China, and India. Sixteen species of Thorea and two species of Nemalionopsis were recognized. Morphological observations confirmed the distinctness of the two genera and also provided some characters to distinguish species. However, many of the collections were in "Chantransia" stage rather than gametophyte stage, meaning that key diagnostic morphological characters were unavailable. Three new species are proposed primarily based on the DNA sequence data generated in this study, Thorea kokosinga-pueschelii, T. mauitukitukii, and T. quisqueyana. In addition to these newly described species, one DNA sequence from GenBank was not closely associated with other Thorea clades and may represent further diversity in the genus. Two species in Nemalionopsis are recognized, N. shawii and N. parkeri nom. et stat. nov. Thorea harbors more diversity than had been recognized by morphological data alone. Distribution data indicated that Nemalionopsis is common in the Pacific region, whereas Thorea is more globally distributed. Most species of Thorea have a regional distribution, but Thorea hispida appears to be cosmopolitan.

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Section: Resultssupporting

confidence: 85%

Three gene phylogeny of the Thoreales (Rhodophyta) reveals high species diversity

Johnston

Dixon

West

et al. 2018

Journal of Phycology

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“…Unfortunately no herbarium specimens are available in the National Herbarium in Leiden, The Netherlands or the National Botanical Garden in Calcutta so this record is unsubstantiated. C. beccarii also has been found in other SE Asian countries including Thailand (Sato and Akiyama 2001), Vietnam (Kamiya et al 2003) and in freshwater rivers (24-29°C, pH 7-8, conductivity 40-50 µS cm -2 ) in Selangor and Negeri Sembilan of peninsular Malaysia (Johnston et al 2014).…”

Section: Introductionmentioning

confidence: 87%

Caloglossa beccarii (Delesseriaceae, Rhodophyta) from freshwater rivers in Kerala, India, a critical new record

West¹,

Kamiya²,

Ganesan³

et al. 2015

ALGAE

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Caloglossa species occurs in freshwater streams around Southest Asia. We report it from 2 different riverine sites in Kerala, India. Tetrasporangiate plants were observed in field collections from the Periyar River and Chalakkudy River. The Chalakkudy isolate did not reproduce in culture but the Periyar isolate developed abundant tetrasporangial sori in culture. Many spores were discharged and most were abortive, but some germinated normally, sporelings forming male gametophytes with numerous spermatangial sori and females with many procarps, viable carposporophytes and some nonfunctional (no carpospores) pseudocystocarps. Some carpospores germinated forming new tetrasporophytes. Molecular evidence (28S rDNA and rbcL) placed the Indian specimens close to C. beccarii and C. fluviatilis. Considering the freshwater habitat and morphology of vegetative thalli (blade shape, rhizoid arrangement, and number of rhizoid filament per cell), the Indian specimens should be assigned to C. beccarii.Key Words: Caloglossa beccarii; Caloglossa fluviatilis; India; Kerala; LSU; rbcL INTRODUCTIONThe Ceramiales is the most varied order among red algae (ca. 420 genera, 2,660 species) (Guiry and Guiry 2015), but only a few genera have been found from freshwater habitats. The genus Caloglossa (Delesseriaceae, Ceramiales) is widespread in tropical to temperate mangrove, estuarine and freshwater habitats. It is comprised of 22 currently accepted species (Guiry and Guiry 2015), and the following six species have been reported from freshwater streams.Caloglossa beccarii (Zanardini) DeToni was described as Delesseria beccarii Zanardini that occurred with Thorea flagelliformis Zanardini in a freshwater stream near Gunung Pueh in Sarawak, Malaysia (Zanardini 1872, Beccari 1904. The species is recorded as "epilithic on stones in freshwater coastal streams and epiphytic on mangrove trunks, prop roots and pneumatophores in areas with moderate water flow and high turbidity and restricted to south-east Asia (India, Burma, Malaysia, Indonesia, Singapore), the western Pacific, and northern Australia as far south as 28° S" (King and Puttock 1994, Kamiya et al. 2003). On Guadalcanal, Solomon Islands, Womersley and Bailey (1970) recorded it growing in a swimming hole near Received July 2, 2015, Accepted August 30, 2015 *Corresponding Author E-mail: jwest@unimelb.edu.au Tel: This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. (Krayesky et al. 2012), because, in addition to the distinct phylogenetic relationship, the rhizoidal arrangement and nodal constriction of blades are distinct from those of C. beccarii (Krayesky et al. 2012).The closely related C. ogasawaraensis Okamura was first described from the Ogasawara Islands of southern Japan (Okamura 1897) and is now widely recorded in marine, estuarine...

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“…, Johnston et al. ). In addition, taxa were checked for sequence identity for the gene encoding the Rubisco large subunit ( rbc L) against sequences in the GenBank (Benson et al.…”

Section: Methodsmentioning

confidence: 99%

Organization of plastid genomes in the freshwater red algal order Batrachospermales (Rhodophyta)

Paiano

Cortona

Costa

et al. 2017

Journal of Phycology

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Little is known about genome organization in members of the order Batrachospermales, and the infra‐ordinal relationship remains unresolved. Plastid (cp) genomes of seven members of the freshwater red algal order Batrachospermales were sequenced, with the following aims: (i) to describe the characteristics of cp genomes and compare these with other red algal groups; (ii) to infer the phylogenetic relationships among these members to better understand the infra‐ordinal classification. Cp genomes of Batrachospermales are large, with several cases of gene loss, they are gene‐dense (high gene content for the genome size and short intergenic regions) and have highly conserved gene order. Phylogenetic analyses based on concatenated nucleotide genome data roughly supports the current taxonomic system for the order. Comparative analyses confirm data for members of the class Florideophyceae that cp genomes in Batrachospermales is highly conserved, with little variation in gene composition. However, relevant new features were revealed in our study: genome sizes in members of Batrachospermales are close to the lowest values reported for Florideophyceae; differences in cp genome size within the order are large in comparison with other orders (Ceramiales, Gelidiales, Gracilariales, Hildenbrandiales, and Nemaliales); and members of Batrachospermales have the lowest number of protein‐coding genes among the Florideophyceae. In terms of gene loss, apcF, which encodes the allophycocyanin beta subunit, is absent in all sequenced taxa of Batrachospermales. We reinforce that the interordinal relationships between the freshwater orders Batrachospermales and Thoreales within the Nemaliophycidae is not well resolved due to limited taxon sampling.

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Diversity of freshwater red algae (Rhodophyta) in Malaysia and Indonesia from morphological and molecular data

Cited by 40 publications

References 28 publications

Three gene phylogeny of the Thoreales (Rhodophyta) reveals high species diversity

Three gene phylogeny of the Thoreales (Rhodophyta) reveals high species diversity

Caloglossa beccarii (Delesseriaceae, Rhodophyta) from freshwater rivers in Kerala, India, a critical new record

Organization of plastid genomes in the freshwater red algal order Batrachospermales (Rhodophyta)

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