Commercial varieties of Kappaphycus and Eucheuma in Malaysia

Phang, Siew-Moi; Yeong, Hui-Yin; Lim, Phaik-Eem; Nor, Adibi Rahiman Md; Gan, Kian Tee

doi:10.22452/mjs.vol29no3.4

Cited by 42 publications

(19 citation statements)

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“…Despite being extensively farmed, the morphologically diverse nature of Kappaphycus and Eucheuma still poses difficulties in species identification [22], [23], [24], [25], [26], [27], [28], even leading to the cultivation of mixed populations that inevitably reduces overall yield [29]. These have resulted in the subsequent employment of molecular phylogenetic studies which all share one main objective – to infer and understand the phylogenetic relationships between Kappaphycus and Eucheuma congeners.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Four Molecular Markers as Potential DNA Barcodes for Red Algae Kappaphycus Doty and Eucheuma J. Agardh (Solieriaceae, Rhodophyta)

et al. 2012

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DNA barcoding has been a major advancement in the field of taxonomy, seeing much effort put into the barcoding of wide taxa of organisms, macro and microalgae included. The mitochondrial-encoded cox1 and plastid-encoded rbcL has been proposed as potential DNA barcodes for rhodophytes, but are yet to be tested on the commercially important carrageenophytes Kappaphycus and Eucheuma. This study gauges the effectiveness of four markers, namely the mitochondrial cox1, cox2, cox2-3 spacer and the plastid rbcL in DNA barcoding on selected Kappaphycus and Eucheuma from Southeast Asia. Marker assessments were performed using established distance and tree-based identification criteria from earlier studies. Barcoding patterns on a larger scale were simulated by empirically testing on the commonly used cox2-3 spacer. The phylogeny of these rhodophytes was also briefly described. In this study, the cox2 marker which satisfies the prerequisites of DNA barcodes was found to exhibit moderately high interspecific divergences with no intraspecific variations, thus a promising marker for the DNA barcoding of Kappaphycus and Eucheuma. However, the already extensively used cox2-3 spacer was deemed to be in overall more appropriate as a DNA barcode for these two genera. On a wider scale, cox1 and rbcL were still better DNA barcodes across the rhodophyte taxa when practicality and cost-efficiency were taken into account. The phylogeny of Kappaphycus and Eucheuma were generally similar to those earlier reported. Still, the application of DNA barcoding has demonstrated our relatively poor taxonomic comprehension of these seaweeds, thus suggesting more in-depth efforts in taxonomic restructuring as well as establishment.

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Section: Introductionmentioning

confidence: 99%

Assessment of Four Molecular Markers as Potential DNA Barcodes for Red Algae Kappaphycus Doty and Eucheuma J. Agardh (Solieriaceae, Rhodophyta)

et al. 2012

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“…Among Asian-Pacific countries, the major economically important seaweed groups have been used for food and feed (humans and animals), materials for industry, traditional medicine, biofertilizers, and as biofuel (bioethanol, biodiesel) (Hong et al 2007;Phang et al 2010).…”

Section: Resultsmentioning

confidence: 99%

Carbon dioxide mitigation potential of seaweed aquaculture beds (SABs)

et al. 2016

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Seaweed aquaculture beds (SABs) that support the production of seaweed and their diverse products, cover extensive coastal areas, especially in the Asian-Pacific region, and provide many ecosystem services such as nutrient removal and CO 2 assimilation. The use of SABs in potential carbon dioxide (CO 2 ) mitigation efforts has been proposed with commercial seaweed production in China, India, Indonesia, Japan, Malaysia, Philippines, Republic of Korea, Thailand, and Vietnam, and is at a nascent stage in Australia and New Zealand. We attempted to consider the total annual potential of SABs to drawdown and fix anthropogenic CO 2 . In the last decade, seaweed production has increased tremendously in the Asian-Pacific region. In 2014, the total annual production of Asian-Pacific SABs surpassed 2.61 × 10 6 t dw. Total carbon accumulated annually was more than 0.78 × 10 6 t y −1 , equivalent to over 2.87 × 10 6 t CO 2 y −1 . By increasing the area available for SABs, biomass production, carbon accumulation, and CO 2 drawdown can be enhanced. The conversion of biomass to biofuel can reduce the use of fossil fuels and provide additional mitigation of CO 2 emissions. Contributions

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“…For example, northeast Sabah and the archipelagos between Sabah and the Philippines are major seaweed farming areas whose output has grown quickly over the last 20 years (Phang, 2006). At present it appears that entirely natural emissions of bromoform in the region are significantly larger than those linked to aquaculture (Leedham et al, 2013), but continued rapid growth in the cultivation of many species with commercial potential (Goh and Lee, 2010; Tan et al, 2013) this situation (Phang et al, 2010). Further, the strength of individual sources is likely to vary over time.…”

Section: Bromoformmentioning

confidence: 99%

Long-term halocarbon observations from a coastal and an inland site in Sabah, Malaysian Borneo

et al. 2014

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Abstract. Short-lived halocarbons are believed to have important sources in the tropics, where rapid vertical transport could provide a significant source to the stratosphere. In this study, quasi-continuous measurements of short-lived halocarbons are reported for two tropical sites in Sabah (Malaysian Borneo), one coastal and one inland (rainforest). We present the observations for C 2 Cl 4 , CHBr 3 , CH 2 Br * 2 (actually ∼ 80 % CH 2 Br 2 and ∼ 20 % CHBrCl 2 ) and CH 3 I from

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Commercial varieties of Kappaphycus and Eucheuma in Malaysia

Cited by 42 publications

References 0 publications

Assessment of Four Molecular Markers as Potential DNA Barcodes for Red Algae Kappaphycus Doty and Eucheuma J. Agardh (Solieriaceae, Rhodophyta)

Assessment of Four Molecular Markers as Potential DNA Barcodes for Red Algae Kappaphycus Doty and Eucheuma J. Agardh (Solieriaceae, Rhodophyta)

Carbon dioxide mitigation potential of seaweed aquaculture beds (SABs)

Long-term halocarbon observations from a coastal and an inland site in Sabah, Malaysian Borneo

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