IF 3.2 3区生物学

Algae Pub Date : 2022-12-15 DOI: 10.4490/algae.2022.37.11.24

S. P. Mihindukulasooriya, H. Kim, Jinhee Cho, Kalahe Hewage Iresha Nadeeka Madushani Herath, Jiwon Yang, Duong Thi Thuy Dinh, Mi-Ok Ko, Y. Jeon, G. Ahn, Y. Jee

{"title":"Polyphenol-rich Sargassum horneri alleviates atopic dermatitis-like skin lesions in NC/Nga mice by suppressing Th2-mediated cytokine IL-13","authors":"S. P. Mihindukulasooriya, H. Kim, Jinhee Cho, Kalahe Hewage Iresha Nadeeka Madushani Herath, Jiwon Yang, Duong Thi Thuy Dinh, Mi-Ok Ko, Y. Jeon, G. Ahn, Y. Jee","doi":"10.4490/algae.2022.37.11.24","DOIUrl":"https://doi.org/10.4490/algae.2022.37.11.24","url":null,"abstract":"Atopic dermatitis (AD) is one of major skin inflammatory diseases characterized by excessive Th2-mediated immune responses. Recent evidence provides that interlukin-13 (IL-13) plays the role of a key Th2 cytokine that drives the inflammation underlining AD. Due to adverse effects of commercially available synthetic drugs, the need for treatments based on natural products is gaining much attention. Sargassum horneri is an edible brown algae known for beneficial bioactivities including anti-inflammation. We investigated if polyphenol-rich S. horneri extracts (SHE) could suppress AD-like skin lesions in NC/Nga mice and if that involved inhibition of the infiltration of Th2-mediated cytokine IL-13. We observed markedly increased infiltration of IL-13 positive cells in AD-like skin lesions of mice but SHE treatments decreased it. Also, the dermal expression of IL-13 was sufficient to cause inflammatory responses in mice skin resembling human AD. SHE suppressed the dermal infiltration of inflammatory cells where IL-13 plays a crucial role in skin tissues and in the recruitment of inflammatory cells. Furthermore, it was confirmed that SHE reduced T cell, dendritic cell, and macrophage populations in spleen. Moreover, SHE decreased the collagen deposition in skin and ear dermis resulting in reduced fibrosis that occurs in AD due to excessive collagen. Taken together, our results reveal that SHE suppressed the infiltration of inflammatory cells into skin dermis by decreasing the infiltration of IL-13 positive cells. Therefore, SHE could be taken as a useful therapeutic agent to alleviate AD.","PeriodicalId":7628,"journal":{"name":"Algae","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42637298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Morphological and molecular characterization of the genus Coolia (Dinophyceae) from Bahía de La Paz, southwest Gulf of California 加利福尼亚湾西南部Bahía de La Paz的Coolia属(恐龙科)的形态和分子特征

IF 3.2 3区生物学

Algae Pub Date : 2022-09-15 DOI: 10.4490/algae.2022.37.9.2

L. Morquecho, I. Gárate-Lizárraga, H. Gu

{"title":"Morphological and molecular characterization of the genus Coolia (Dinophyceae) from Bahía de La Paz, southwest Gulf of California","authors":"L. Morquecho, I. Gárate-Lizárraga, H. Gu","doi":"10.4490/algae.2022.37.9.2","DOIUrl":"https://doi.org/10.4490/algae.2022.37.9.2","url":null,"abstract":"The genus Coolia A. Meunier 1919 has a global distribution and is a common member of epiphytic dinoflagellate assemblages in neritic ecosystems. Coolia monotis is the type species of the genus and was the only known species for 76 years. Over the past few decades, molecular characterization has unveiled two species complexes that group morphologically very similar species, so their limits are often unclear. To provide new knowledge on the biogeography and species composition of the genus Coolia, 16 strains were isolated from Bahía de La Paz, Gulf of California. The species were identified by applying morphological and molecular approaches. The morphometric characteristics of all isolated Coolia species were consistent with the original taxa descriptions. Phylogenetic analyses (large subunit [LSU] rDNA D1 / D2 and internal transcribed spacer [ITS] 1 / 5.8S / ITS2) revealed a species assemblage comprising Coolia malayensis, C. palmyrensis, C. tropicalis, and the C. cf. canariensis lineage. This is the first report of Coolia palmyrensis and C. cf. canariensis in Mexico and C. tropicalis in the Gulf of California. Our results strengthen the biogeographical understanding of these potentially harmful epiphytic dinoflagellate species.","PeriodicalId":7628,"journal":{"name":"Algae","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44705871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Structural characterization and anti-inflammatory activity of fucoidan isolated from Ecklonia maxima stipe Ecklonia maxima柄褐藻糖胶的结构特征及抗炎活性

IF 3.2 3区生物学

Algae Pub Date : 2022-09-15 DOI: 10.4490/algae.2022.37.9.12

Hyo-Geun Lee, D. Nagahawatta, N. M. Liyanage, H. Jayawardhana, Fengqi Yang, Jun-Geon Je, Min-Cheol Kang, Hyun-Soo Kim, Y. Jeon

{"title":"Structural characterization and anti-inflammatory activity of fucoidan isolated from Ecklonia maxima stipe","authors":"Hyo-Geun Lee, D. Nagahawatta, N. M. Liyanage, H. Jayawardhana, Fengqi Yang, Jun-Geon Je, Min-Cheol Kang, Hyun-Soo Kim, Y. Jeon","doi":"10.4490/algae.2022.37.9.12","DOIUrl":"https://doi.org/10.4490/algae.2022.37.9.12","url":null,"abstract":"Enzyme-assisted hydrolysis is frequently used as a cost-effective and efficient method to obtain functional ingredients from bioresources. This study involved the enzyme-assisted hydrolyzation and purification of fucoidan from Ecklonia maxima stipe and the investigation of its anti-inflammatory activity in lipopolysaccharide (LPS)-induced RAW 264.7 cells. Fucoidans of Viscozyme-assisted hydrolysate from E. maxima (EMSFs) harvested in Jeju, Korea. Structural and chemical characterizations were performed using fourier transform infrared spectroscopy, scanning electron microscope, and monosaccharide analysis. Among fucoidans, EMSF6 was rich in fucose and sulfate and had a similar structural character to commercial fucoidan. EMSF6 showed a strong inhibitory effect on nitric oxide generation in LPS-induced RAW 264.7 cells and significantly decreased the production of LPS-induced pro-inflammatory cytokines, including interleukin-6, interleukin-1β, and tumor necrosis factor α. The anti-inflammatory potential of EMSF6 was mediated through the downregulation of inducible nitric oxide synthase and cyclooxygenase-2 expression. Thus, fucoidans from E. maxima stipe are promising candidates for functional food products.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"1 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41799066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Seaweed ethnobotany of eastern Sorsogon, Philippines 菲律宾索索贡东部的海藻民族植物学

IF 3.2 3区生物学

Algae Pub Date : 2022-09-15 DOI: 10.4490/algae.2022.37.8.16

Richard V. Dumilag, Teresa Haide R. Belgica, Lynn Mendoza, Janet M. Hibay, Abel E. Arevalo Jr., M. A. Malto, Elden Orgela, Mabille Longavela, Laurence Elmer H. Corral, Ruby Olipany, C. F. Ruiz, Cynthia B. Mintu, Benilda Laza, Mae H. San Pablo, Jinky D. Bailon, Leny D. Berdin, Franklin Calaminos, S. Gregory, A. Omoto, Vivien L. Chua, L. Liao

{"title":"Seaweed ethnobotany of eastern Sorsogon, Philippines","authors":"Richard V. Dumilag, Teresa Haide R. Belgica, Lynn Mendoza, Janet M. Hibay, Abel E. Arevalo Jr., M. A. Malto, Elden Orgela, Mabille Longavela, Laurence Elmer H. Corral, Ruby Olipany, C. F. Ruiz, Cynthia B. Mintu, Benilda Laza, Mae H. San Pablo, Jinky D. Bailon, Leny D. Berdin, Franklin Calaminos, S. Gregory, A. Omoto, Vivien L. Chua, L. Liao","doi":"10.4490/algae.2022.37.8.16","DOIUrl":"https://doi.org/10.4490/algae.2022.37.8.16","url":null,"abstract":"Knowledge on the seaweeds of eastern Sorsogon in the Philippines is uneven. Not only is eastern Sorsogon among the areas of high seaweed diversity but locals there have interacted with seaweeds for ages. Despite seaweeds’ assumed importance to Sorsoganon, ethnobotanical records are missing. In this study, we documented the traditional knowledge on seaweed use and determined the rate of knowledge transmission among the locals of eastern Sorsogon. Vernacular names and modes of preparation were given of the 12 identified species bearing culinary and medicinal importance. Ten species were eaten while three were used therapeutically. Based on ethnobotanical indices, Caulerpa chemnitzia ecad turbinata and Gelidiella acerosa were the most important seaweeds. The least cited was Caulerpa racemosa. Our study demonstrated that most of the seaweed resources in eastern Sorsogon remain largely untapped, as the identified ethnotaxa were only about 5% of the total seaweed species diversity reported for the area. The seaweed knowledge in eastern Sorsogon appeared to be homogenous across age groups with primary sources of knowledge biased towards female relatives (mothers and grandmothers) and to children as inheritors. Cessation of seaweed knowledge may come at a potential cost, as a significant fraction of the population did not transmit their knowledge to others. Our study furthered the interest in providing sophisticated resource management recommendations that consider the relationships of traditional and scientific knowledge of seaweed selection and use in eastern Sorsogon and beyond.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"1 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71069436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Incorporating concepts of biodiversity into modern aquaculture: macroalgal species richness enhances bioremediation efficiency in a lumpfish hatchery 将生物多样性的概念纳入现代水产养殖:大型藻类物种丰富度提高了块鱼孵化场的生物修复效率

IF 3.2 3区生物学

Algae Pub Date : 2022-09-15 DOI: 10.4490/algae.2022.37.5.12

Jessica Knoop, S. Barrento, Roberto Lewis, B. Walter, J. Griffin

{"title":"Incorporating concepts of biodiversity into modern aquaculture: macroalgal species richness enhances bioremediation efficiency in a lumpfish hatchery","authors":"Jessica Knoop, S. Barrento, Roberto Lewis, B. Walter, J. Griffin","doi":"10.4490/algae.2022.37.5.12","DOIUrl":"https://doi.org/10.4490/algae.2022.37.5.12","url":null,"abstract":"Aquaculture is one of the fastest growing food producing sectors; however, intensive farming techniques of finfish have raised environmental concerns, especially through the release of excessive nutrients into surrounding waters. Biodiversity has been widely shown to enhance ecosystem functions and services, but there has been limited testing or application of this key ecological relationship in aquaculture. This study tested the applicability of the biodiversity-function relationship to integrated multi-trophic aquaculture (IMTA), asking whether species richness can enhance the efficiency of macroalgal bioremediation of wastewater from finfish aquaculture. Five macroalgal species (Chondrus crispus, Fucus serratus, Palmaria palmata, Porphyra dioica, and Ulva sp.) were cultivated in mono- and polyculture in water originating from a lumpfish (Cyclopterus lumpus) hatchery. Total seaweed biomass production, specific growth rates (SGR), and the removal of ammonium (NH4 +), total oxidised nitrogen (TON), and phosphate (PO4 3-) from the wastewater were measured. Species richness increased total seaweed biomass production by 11% above the average component monoculture, driven by an increase in up to 5% in SGR of fast-growing macroalgal species in polycultures. Macroalgal species richness further enhanced ammonium uptake by 25%, and TON uptake by nearly 10%. Phosphate uptake was not improved by increased species richness. The increased uptake of NH4 + and TON with increased macroalgal species richness suggests the complementary use of different nitrogen forms (NH4 + vs. TON) in macroalgal polycultures. The results demonstrate enhanced bioremediation efficiency by increased macroalgal species richness and show the potential of integrating biodiversity- function research to improve aquaculture sustainability.","PeriodicalId":7628,"journal":{"name":"Algae","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47101703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of light-emitting diodes on protoplast regeneration from gametophytic cells of the commercial kelp Undaria pinnatifida (Laminariales, Phaeophyceae) 发光二极管对海带配子体细胞原生质体再生的影响

IF 3.2 3区生物学

Algae Pub Date : 2022-06-15 DOI: 10.4490/algae.2022.37.6.7

José Avila-Peltroche, B. Won, T. Cho

{"title":"Effects of light-emitting diodes on protoplast regeneration from gametophytic cells of the commercial kelp Undaria pinnatifida (Laminariales, Phaeophyceae)","authors":"José Avila-Peltroche, B. Won, T. Cho","doi":"10.4490/algae.2022.37.6.7","DOIUrl":"https://doi.org/10.4490/algae.2022.37.6.7","url":null,"abstract":"Light-emitting-diodes (LEDs) are a lighting source useful for the precise evaluation of light quality effect on biological systems. Despite the importance of light spectra on the regeneration of land plant protoplasts (“naked cells”), this factor has not been tested yet on protoplasts from multicellular algae. This study reports on the effects of pure primary colors (red, blue, and green), dichromatic (red plus blue, RB, 1 : 2) and white LEDs on protoplast regeneration from male and female Undaria pinnatifida gametophytes. We also evaluated the effect of different light spectra on pigment composition (chlorophyll a, chlorophyll c, and fucoxanthine), and the light intensities under the best condition on the regeneration process. In the early stages, blue or RB LEDs increased the percentage of dividing female protoplasts, whereas red, blue, and RB LEDs enhanced that of dividing male protoplasts. In the later stages, RB LEDs showed a positive effect only on the percentage of multiple rhizoid-like protrusions (male gametophyte). They also increased the final area of both regenerated gametophytes. The LEDs did not affect pigment composition in female gametophytes. In male gametophytes, in contrast, they reduced chlorophyll c, while blue, RB, and green LEDs decreased fucoxanthin. Under RB LEDs, the optimal light intensity was 80 μmol photons m-2 s-1 for female gametophytes and 40 to 60 μmol photons m-2 s-1 for male gametophytes. Our results suggest that dichromatic LED illumination (red–blue) improves regeneration of U. pinnatifida gametophyte-isolated protoplasts. Thus, dichromatic LEDs might a suitable light source for enhancing protoplast regeneration in brown seaweeds.","PeriodicalId":7628,"journal":{"name":"Algae","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45585107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Recent advances in seaweed seedling production: a review of eucheumatoids and other valuable seaweeds 海藻幼苗生产的最新进展：桉树和其他有价值的海藻综述

IF 3.2 3区生物学

Algae Pub Date : 2022-06-15 DOI: 10.4490/algae.2022.37.5.11

Calvin Jiksing, McMarshall M. Ongkudon, Vun Yee Thien, K. Rodrigues, W. T. L. Yong

{"title":"Recent advances in seaweed seedling production: a review of eucheumatoids and other valuable seaweeds","authors":"Calvin Jiksing, McMarshall M. Ongkudon, Vun Yee Thien, K. Rodrigues, W. T. L. Yong","doi":"10.4490/algae.2022.37.5.11","DOIUrl":"https://doi.org/10.4490/algae.2022.37.5.11","url":null,"abstract":"Modern seaweed farming relies heavily on seedlings from natural beds or vegetative cuttings from previous harvests. However, this farming method has some disadvantages, such as physiological variation in the seed stock and decreased genetic variability, which reduces the growth rate, carrageenan yield, and gel strength of the seaweeds. A new method of seedling production that is sustainable, scalable, and produces a large number of high-quality plantlets is needed to support the seaweed farming industry. Recent use of tissue culture and micropropagation techniques in eucheumatoid seaweed production has yielded promising results in increasing seed supply and growing uniform seedlings in large numbers in a shorter time. Several seaweed species have been successfully cultured and regenerated into new plantlets in laboratories using direct regeneration, callus culture, and protoplast culture. The use of biostimulants and plant growth regulators in culture media increases the seedling quality even further. Seedlings produced by micropropagation grew faster and had better biochemical properties than conventionally cultivated seedlings. Before being transferred to a land-based grow-out system or ocean nets for farming, tissue-cultured seedlings were recommended to undergo an acclimatization process to increase their survival rate. Regular monitoring is needed to prevent disease and pest infestations and grazing by herbivorous fish and turtles during the farming process. The current review discusses recent techniques for producing eucheumatoid and other valuable seaweed farming materials, emphasizing the efficiency of micropropagation and the transition from laboratory culture to cultivation in land-based or open-sea grow-out systems to elucidate optimal conditions for sustainable seaweed production.","PeriodicalId":7628,"journal":{"name":"Algae","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43576751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Development of an automatic system for cultivating the bioluminescent heterotrophic dinoflagellate Noctiluca scintillans on a 100-liter scale 百升异养异养双鞭毛藻夜光藻自动培养系统的研制

IF 3.2 3区生物学

Algae Pub Date : 2022-06-15 DOI: 10.4490/algae.2022.37.6.8

Ji Hyun You, H. Jeong, Sang Ah Park, Jin Hee Ok, Hee Chang Kang, S. Eom, A. Lim

{"title":"Development of an automatic system for cultivating the bioluminescent heterotrophic dinoflagellate Noctiluca scintillans on a 100-liter scale","authors":"Ji Hyun You, H. Jeong, Sang Ah Park, Jin Hee Ok, Hee Chang Kang, S. Eom, A. Lim","doi":"10.4490/algae.2022.37.6.8","DOIUrl":"https://doi.org/10.4490/algae.2022.37.6.8","url":null,"abstract":"Noctiluca scintillans is a heterotrophic dinoflagellate that causes red-colored oceans during the day (red tides) and glowing oceans at night (bioluminescence). This species feeds on diverse prey, including phytoplankton, heterotrophic protists, and eggs of metazoans. Thus, many scientists have conducted studies on the ecophysiology of this species. It is easy to cultivate N. scintillans at a scale of <1 L, but it is difficult to cultivate them at a scale of >100 L because N. scintillans cells usually stay near the surface, while prey cells stay below the surface in large water tanks. To obtain mass-cultured N. scintillans cells, we developed an automatic system for cultivating N. scintillans on a scale of 100 L. The system consisted of four tanks containing fresh nutrients, the chlorophyte Dunaliella salina as prey, N. scintillans for growth, and N. scintillans for storage, respectively. The light intensities supporting the high growth rates of D. salina and N. scintillans were 300 and 20 μmol photons m-2 s-1, respectively. Twenty liters of D. salina culture from the prey culture tank were transferred to the predator culture tank, and subsequently 20 L of nutrients from the nutrient tank were transferred to the prey culture tank every 2 d. When the volume of N. scintillans in the predator culture tank reached 90 L 6 d later, 70 L of the culture were transferred to the predator storage tank. To prevent N. scintillans cells from being separated from D. salina cells in the predator culture tank, the culture was mixed using an air pump, a sparger, and a stirrer. The highest abundance of N. scintillans in the predator culture tank was 45 cells mL-1, which was more than twice the highest abundance when this dinoflagellate was cultivated manually. This automatic system supplies 100 L of N. scintillans pure culture with a high density every 10 d for diverse experiments on N. scintillans.","PeriodicalId":7628,"journal":{"name":"Algae","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45255173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Phylogeographic patterns in cryptic Bostrychia tenella species (Rhodomelaceae, Rhodophyta) across the Thai-Malay Peninsula 泰国-马来半岛上隐藏式柔嫩Bostrychia tenella物种(Rhodomelaceae, Rhodophyta)的系统地理格局

IF 3.2 3区生物学

Algae Pub Date : 2022-06-15 DOI: 10.4490/algae.2022.37.6.4

Jakaphan Bulan, S. Maneekat, G. Zuccarello, N. Muangmai

{"title":"Phylogeographic patterns in cryptic Bostrychia tenella species (Rhodomelaceae, Rhodophyta) across the Thai-Malay Peninsula","authors":"Jakaphan Bulan, S. Maneekat, G. Zuccarello, N. Muangmai","doi":"10.4490/algae.2022.37.6.4","DOIUrl":"https://doi.org/10.4490/algae.2022.37.6.4","url":null,"abstract":"Genetic diversity and distribution patterns of marine macroalgae are increasingly being documented in Southeast Asia. These studies show that there can be significant levels of genetic diversity and isolation between populations on either side of the Thai-Malay Peninsula. Bostrychia tenellla is a common filamentous red seaweed in the region and the entity is represented by at least two cryptic species. Despite being highly diverse and widespread, genetic variation and population structure of this species complex remains understudied, especially around the Thai-Malay Peninsula. We analyzed genetic diversity and inferred the phylogeographic pattern of specimens identified as B. tenella using the plastid RuBisCo spacer from samples from the Andaman Sea and the Gulf of Thailand. Our genetic analysis confirmed the occurrence of the two cryptic B. tenella species (B and C) along both coasts. Cryptic species B was more common in the area and displayed higher genetic diversity than species C. Historical demographic analyses indicated a stable population for species B, but more recent population expansion for species C. Our analyses also revealed that both cryptic species from the Andaman Sea possessed higher genetic diversity than those of the Gulf of Thailand. We also detected moderate to high levels of gene flow and weak phylogeographic structure of cryptic species B between the two coasts. In contrast, phylogeographic analysis showed genetic differences between populations of both cryptic species within the Andaman Sea. Overall, these results suggest that cryptic B. tenella species around Thai-Malay Peninsula may have undergone different demography histories, and their patterns of genetic diversity and phylogeography were likely caused by geological history and regional sea surface current circulation in the area.","PeriodicalId":7628,"journal":{"name":"Algae","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44376404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Phylogeography of the economic seaweeds Chondrus (Gigartinales, Rhodophyta) in the northwest Pacific based on rbcL and COI-5P genes 基于rbcL和COI-5P基因的西北太平洋经济海藻Chondrus（巨藻目，红藻门）的系统发育地理学

IF 3.2 3区生物学

Algae Pub Date : 2022-06-15 DOI: 10.4490/algae.2022.37.5.29

M. Yang, M. Kim

{"title":"Phylogeography of the economic seaweeds Chondrus (Gigartinales, Rhodophyta) in the northwest Pacific based on rbcL and COI-5P genes","authors":"M. Yang, M. Kim","doi":"10.4490/algae.2022.37.5.29","DOIUrl":"https://doi.org/10.4490/algae.2022.37.5.29","url":null,"abstract":"The red algal genus Chondrus have long been used as raw materials for carrageenan and dietary fiber in health foods. Despite the importance of genetic information in safeguarding natural seaweed resources, knowledge of the population genetics of Chondrus in the northwest Pacific is limited. In this study, genetic diversity and phylogeographic structure of 45 populations (777 specimens) of Chondrus from Korea, China, and Japan were evaluated based on mitochondrial COI- 5P gene sequences, and phylogenetic relationships were confirmed based on plastid rbcL gene sequences. Molecular analyses assigned the specimens in this study to three Chondrus species: C. nipponicus, C. ocellatus, and C. giganteus; phenotype-based species classification was impossible owing to their high morphological plasticity. We found moderate intraspecific genetic diversity and a shallow phylogeographic structure in both for C. nipponicus and C. ocellatus, and low intraspecific genetic diversity in C. giganteus. Each of the three species exhibited high-level intraspecific gene flow among regions based on the most common haplotypes (CN1 for C. nipponicus, CO1 for C. ocellatus, and CG1 for C. giganteus). Our comprehensive genetic information provides insights into the phylogeographic patterns and intraspecific diversity of the economically important Chondrus species. It also highlights the need to conserve existing natural Chondrus resources through continuous monitoring of genetic diversity and phylogeographic pattern.","PeriodicalId":7628,"journal":{"name":"Algae","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45169787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

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