Effects of temperature on growth and fatty acid synthesis in the cyclopoid copepod Paracyclopina nana

Lee, Seung-Hwi; Lee, Min Chul; Puthumana, Jayesh; Park, Jun Chul; Kang, Sujin; Han, Jeonghoon; Shin, Kyung‐Hoon; Park, Heum Gi; Om, Ae-Son; Lee, Jae‐Seong

doi:10.1007/s12562-017-1104-2

Cited by 22 publications

(15 citation statements)

References 48 publications

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“…However, whereas species like the pike silverside Chirostorma estor reduced the enzymatic activities of PUFA biosynthesis at lower salinities (Fonseca-Madrigal et al 2012), other species like Siganus canaliculatus enhanced the PUFA biosynthesising genes when subjected to reduced salinity (Xie et al 2015). The latter response appears to operate in the monogonont rotifer Brachionus koreanus, in which elongases and desaturases, some of which have putative roles in PUFA biosynthesis, were downregulated after exposure to high salinity (Lee et al 2017b).…”

Section: Regulation Of Pufa-biosynthesising Desaturases and Elongasesmentioning

confidence: 99%

Desaturases and elongases involved in polyunsaturated fatty acid biosynthesis in aquatic invertebrates: a comprehensive review

2018

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Invertebrates represent a large proportion of the biomass in aquatic ecosystems, particularly in the ocean. In recent years, invertebrates have been well-consolidated models in evolutionary developmental biology research and, consequently, genomic and transcriptomic sequence databases from a plethora of species across the animal kingdom have become available. This has provided an excellent source of evidence confirming that invertebrates operate endogenous mechanisms for PUFA production. The present paper reviews the current knowledge of gene complement and, where possible, the function of desaturases and elongases with pivotal roles in PUFA biosynthesis of aquatic invertebrates. More specifically, this review covers three major enzyme types, namely ωx desaturases, front-end desaturases and elongases, that have been characterised from species of sponges, cnidarians, molluscs, annelids, crustaceans, rotifers, echinoderms and non-vertebrate chordates (amphioxus and sea squirt). These studies have shown that invertebrates operate alternative and unusual pathways of PUFA biosynthesis involving gene families with complex phylogeny and functional diversity. Consequently, research in this area provides potentially valuable molecular tools in the form of genes that can be used in the biotechnological production of n-3 products.

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Section: Regulation Of Pufa-biosynthesising Desaturases and Elongasesmentioning

confidence: 99%

Desaturases and elongases involved in polyunsaturated fatty acid biosynthesis in aquatic invertebrates: a comprehensive review

2018

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“…Proportional changes of lipid composition in response to temperature changes are a major cellular response to adjust membrane fluidity. In aquatic invertebrates, alterations in temperature have been repeatedly connected to expression changes in genes related to lipid metabolism [63,66]. Several ELOVL genes have also been characterized for their adaptive function in Brachionus koreanus , and although their expression was downregulated after exposure to high salinity, the impact of functionally relevant mutations is still unknown [67,68].…”

Section: Discussionmentioning

confidence: 99%

Within species expressed genetic variability and gene expression response to different temperatures in the rotifer Brachionus calyciflorus sensu stricto

et al. 2019

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Genetic divergence is impacted by many factors, including phylogenetic history, gene flow, genetic drift, and divergent selection. Rotifers are an important component of aquatic ecosystems, and genetic variation is essential to their ongoing adaptive diversification and local adaptation. In addition to coding sequence divergence, variation in gene expression may relate to variable heat tolerance, and can impose ecological barriers within species. Temperature plays a significant role in aquatic ecosystems by affecting species abundance, spatio-temporal distribution, and habitat colonization. Recently described (formerly cryptic) species of the Brachionus calyciflorus complex exhibit different temperature tolerance both in natural and in laboratory studies, and show that B. calyciflorus sensu stricto (s.s.) is a thermotolerant species. Even within B. calyciflorus s.s., there is a tendency for further temperature specializations. Comparison of expressed genes allows us to assess the impact of stressors on both expression and sequence divergence among disparate populations within a single species. Here, we have used RNA-seq to explore expressed genetic diversity in B. calyciflorus s.s. in two mitochondrial DNA lineages with different phylogenetic histories and differences in thermotolerance. We identify a suite of candidate genes that may underlie local adaptation, with a particular focus on the response to sustained high or low temperatures. We do not find adaptive divergence in established candidate genes for thermal adaptation. Rather, we detect divergent selection among our two lineages in genes related to metabolism (lipid metabolism, metabolism of xenobiotics).

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“…The second species was described by Lee and Chang (2019) from a shallow littoral (25 m) on the East Coast and intertidal sands on the West Coast of South Korea. The third species was described by Smirnov (1935) from Vladivostok (Russia) and was subsequently reported also from China (Shen 1979), Japan (Ueda et al 2001), and South Korea (Chang 2009(Chang , 2010; interestingly, this cyclopinid has become a model organism for various genomic and physiological studies in recent years (Jeong et al 2015;Lee et al 2015Lee et al , 2017. Chang (2011) also mentioned unidentified specimens belonging to the genus Cyclopina Claus, 1863 accompanying Cyclopinoides orientalis, but it is unclear if these were collected in South Korea or Japan.…”

Section: Introductionmentioning

confidence: 96%

Four new Cyclopina (Copepoda, Cyclopinidae) from South Korea

Karanovic¹

2020

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Copepods are well studied in South Korea, with the exception of marine non-parasitic cyclopoids, and especially cyclopinids; only three species were found so far here, and only one of them is endemic. A survey of intertidal interstitial faunas from sandy beaches revealed four endemic members of the genus Cyclopina Claus, 1863, which represents the first record of the largest cyclopinid genus in South Korea. A detailed study of their morphology revealed numerous differences, including in rarely studied cuticular organs. Some of these micro-characters could easily be homologised and showed little intraspecific variability, which might prove invaluable for matching sexes and reconstructing phylogenetic relationships. Cyclopina busanensissp. nov. is described from both sexes collected near Busan (South Coast of South Korea), and is most similar to the only congener from Japan: C. kiraensis Horomi, 1984. Cyclopina koreanasp. nov. is described from both sexes collected near Gangneung (East Coast), and has no close relatives among currently known species. Cyclopina curtijejusp. nov. is described from two females from Jeju (off South Coast); it is possibly closely related to C. smirnovi Herbst, 1982, but the latter is known from a single male from the Russian Far East. Cyclopina widosp. nov. is described from both sexes from Wido (West Coast), and shows numerous reductions in segmentation and armature of appendages, most of them probably a consequence of its diminutive size. A table of 26 discrete and continuous characters commonly used in the taxonomy of this group is provided for 48 valid species and subspecies of Cyclopina.

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Effects of temperature on growth and fatty acid synthesis in the cyclopoid copepod Paracyclopina nana

Cited by 22 publications

References 48 publications

Desaturases and elongases involved in polyunsaturated fatty acid biosynthesis in aquatic invertebrates: a comprehensive review

Desaturases and elongases involved in polyunsaturated fatty acid biosynthesis in aquatic invertebrates: a comprehensive review

Within species expressed genetic variability and gene expression response to different temperatures in the rotifer Brachionus calyciflorus sensu stricto

Four new Cyclopina (Copepoda, Cyclopinidae) from South Korea

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