Changes in the cell size of the diatom<i>Cylindrotheca closterium</i>in a hyperhaline pond

Miranda, Migdalia; Gaviano, M.; Serra, Emilio

doi:10.1080/02757540512331323962

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…For example, salinity level has been shown to affect the spatial distribution of benthic diatoms by modifying their migratory behavior or favoring a drifting strategy (Underwood et al ., ; Sauer et al ., ; Araujo et al ., ). Field and laboratory experiments have also shown that salinity alone or in combination with other physicochemical factors can impact diatom growth (Baek et al ., ; Sogaard et al ., ) and cell size (De Miranda et al ., ), induce changes in photosynthesis and primary production (Radchenko and Il'iash, ; Osborn and Hook, ), elicit oxidative stress responses (Rijstenbil, ; Zhang et al ., ) and induce changes in the morphology of the diatoms' silica shell (frustules; Vrieling et al ., ; Martin‐Cereceda and Cox, ; Trobajo et al ., ; Ligowski et al ., ; Leterme et al ., ). Variation in salinity level can also influence the production of dimethylsulfoniopropionate (Lyon et al ., ; Kettles et al ., ), a biogenic precursor of a climatically active sulfur compound that is involved in cloud formation.…”

Section: Introductionmentioning

confidence: 99%

Physiological adjustments and transcriptome reprogramming are involved in the acclimation to salinity gradients in diatoms

Bussard

Corre

Hubas

et al. 2016

Environmental Microbiology

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Salinity regimes in estuaries and coastal areas vary with river discharge patterns, seawater evaporation, the morphology of the coastal waterways and the dynamics of marine water mixing. Therefore, microalgae have to respond to salinity variations at time scales ranging from daily to annual cycles. Microalgae may also have to adapt to physical alterations that induce the loss of connectivity between habitats and the enclosure of bodies of water. Here, we integrated physiological assays and measurements of morphological plasticity with a functional genomics approach to examine the regulatory changes that occur during the acclimation to salinity in the estuarine diatom Thalassiosira weissflogii. We found that cells exposed to different salinity regimes for a short or long period presented adjustments in their carbon fractions, silicon pools, pigment concentrations and/or photosynthetic parameters. Salinity-induced alterations in frustule symmetry were observed only in the long-term (LT) cultures. Whole transcriptome analyses revealed a down-regulation of nuclear and plastid encoded genes during the LT response and identified only a few regulated genes that were in common between the ST and LT responses. We propose that in diatoms, one strategy for acclimating to salinity gradients and maintaining optimal cellular fitness could be a reduction in the cost of transcription.

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Section: Introductionmentioning

confidence: 99%

Physiological adjustments and transcriptome reprogramming are involved in the acclimation to salinity gradients in diatoms

Bussard

Corre

Hubas

et al. 2016

Environmental Microbiology

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“…Most papers analysed the phytoplankton component of coastal lagoons (e.g. Fiocca et al 1996;De Miranda et al 2005) and, also, of ephemeral/temporary ponds (e.g. Alfinito and Iberite 2013) and lakes (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Sannio et al 1996;Padedda et al 2012). Ecological studies generally correlated the abundance, presence, or fluctuation of algae conditions with physical and chemical water gradients (De Miranda et al 2005;Padedda et al 2012). There are few papers on algal conservation, despite their usefulness for the evaluation of water and, consequently, for wetland conservation and effective monitoring techniques (Lai et al 2010;Manzano et al 2019).…”

Section: Discussionmentioning

confidence: 99%

Where we Come from and where to Go: Six Decades of Botanical Studies in the Mediterranean Wetlands, with Sardinia (Italy) as a Case Study

et al. 2021

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Plants are key elements of wetlands due to their evolutionary strategies for coping with life in a water-saturated environment, providing the basis for supporting nearly all wetland biota and habitat structure for other taxonomic groups. Sardinia, the second largest island of the Mediterranean Basin, hosts a great variety of wetlands, of which 16 are included in eight Ramsar sites. The 119 hydro- and hygrophilous vascular plant taxa from Sardinia represent the 42.6% and 37.9% of the number estimated for Italy and Europe, respectively. Moreover, around 30% of Sardinia’s bryological flora, which is made up of 498 taxa, is present in temporary ponds. An overview at regional scale considering algae is not available, to our knowledge, even though several specific studies have contributed to their knowledge. In order to find the most investigated research themes and wetland types, identify knowledge gaps and suggest recommendations for further research, we present a first attempt to outline the work that has been hitherto done on plants in lentic habitats in Sardinia. Three plant groups (algae, bryophytes and vascular plants), and five research themes (conservation, ecology, inventory, palaeobotany and taxonomy) were considered. After a literature review, we retained 202 papers published from 1960 to 2019. We found that studies on vascular plants, as plant group, were disproportionately more numerous, and inventories and ecology were the most investigated research themes. Although efforts have recently been made to fill these long-lasting gaps, there is a need for updating the existing information through innovative methods and integrative approaches.

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“…Cylindrotheca closterium is a marine eukaryotic unicellular diatom, and the cell shape is fusiform, 12 ~ 23 µm in length and 23 µm in width [13,14]. The microalgal species C. closterium is widely sought due to its ability to synthesize large amounts of lipid bodies and for its high biomass productivity, making it an ideal choice for the production of food, feed, nutraceuticals, and biofuel [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effects of light qualities on growth, lipid contents and fatty acids profiles of Cylindrotheca closterium

Zhang

Peng

Yong

et al. 2021

Preprint

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Background Marine diatoms were considered as a promising alternative to microbial resources for the development of biofuels, food additives, medicines and chemical materials. Light of wavelength is a principal element that can easily be controlled in microalgal scale-culture and influence the growth, pigment composition, and lipids accumulation of algal cells. With the increasing implementation of light-emitting diodes (LEDs) in microalgal production systems (photobioreactors), a measure of light quality controlled by LED could be suitable to improve microalgal yields. Results In this study, Cylindrotheca Closterium, a widely used diatom, influenced by five light quality (white, red, blue, green and yellow light) was tested for its effects of growth rates, chlorophylls contents, total lipids contents and fatty acids compositions. The growth and chlorophyll experiments also showed that the green and yellow light significantly improve the growth rates and chlorophylls contents than other groups (P < 0.05). The group white light showed the greatest increases in total lipid contents of C. closterium (P < 0.05). The group blue light had the highest polyunsaturated fatty acids (PUFAs) proportion (P < 0.05), while the group white showed the lowest PUFAs and the highest saturated fatty acids (SFAs) and monounsaturated fatty acids (MUFAs) proportions (P < 0.05). The proportions of SFAs and MUFAs were negatively correlated with growth, chlorophylls, and lipids. And the proportion of PUFAs and n-3 PUFA was positively correlated with growth chlorophylls, and lipids. Principal component analysis showed that the fatty acid composition differed among light quality groups. Conclusion In summary, green light and yellow light were conductive to boosting the growth and chlorophylls accumulation of C. closterium. White light increased total lipid yields, while blue light was superior in increasing the production of unsaturated fatty acids, especially on the timnodonic acid (EPA). The application of two-step methods to increase the production of biomass and fatty acids is an effective measure for the cultivation of C. closterium; green light is used to increase the growth, followed by white light cultivation to improve total lipids or blue light to enhance the proportion of PUFAs of C. closterium.

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Changes in the cell size of the diatomCylindrotheca closteriumin a hyperhaline pond

Cited by 11 publications

References 16 publications

Physiological adjustments and transcriptome reprogramming are involved in the acclimation to salinity gradients in diatoms

Physiological adjustments and transcriptome reprogramming are involved in the acclimation to salinity gradients in diatoms

Where we Come from and where to Go: Six Decades of Botanical Studies in the Mediterranean Wetlands, with Sardinia (Italy) as a Case Study

Effects of light qualities on growth, lipid contents and fatty acids profiles of Cylindrotheca closterium

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