Gene expression profile of marine Chlorella strains from different latitudes: stress and recovery under elevated temperatures

Barati, Bahram; Lim, Phaik Eem; Gan, Sook Yee; Poong, Sze-Wan; Phang, Siew Moi

doi:10.1007/s10811-018-1588-x

Cited by 9 publications

(7 citation statements)

References 63 publications

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“…It has been shown more recently that desmid microalgae (Stamenković and Hanelt, 2013) and Chlorella spp. (Barati et al, 2018) strains displayed physiological responses towards temperature that matched the locations from which they had been isolated.…”

Section: Introductionmentioning

confidence: 78%

“…(Stamenković and Hanelt, 2013) and Chlorella spp. (Barati et al, 2018) strains isolated from different geographical regions from tropical to glacial. It is remarkable that the overall highest biomass productivity of the ePBR simulations corresponded to the Buenos Aires strain under mean weather conditions of Jujuy, which resulted 40% more productive than the native strain (Fig.…”

Section: Comparison Of Biomass Productivity Of Selected Native Strains From Lowor High-irradiance Geographical Sitesmentioning

confidence: 99%

“…strain appeared to be tolerant to a wider range of high temperatures and recovered sooner from stressing high temperatures than a temperate or a tropical Chlorella sp. strains (Barati et al, 2018). This physiological response is quite often displayed by some microbes from extreme environments that slowdown its metabolism under the prevailing stressing conditions but efficiently activate pathways for biomass production during short periods of permissive conditions (Piette et al, 2011).…”

Section: Comparison Of Biomass Productivity Of Selected Native Strains From Lowor High-irradiance Geographical Sitesmentioning

confidence: 99%

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Effect of matching microalgal strains origin and regional weather condition on biomass productivity in environmental photobioreactors

Coronel

Nascimento

Curatti

2019

Bioresource Technology Reports

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It is generally assumed that increased microalgal biomass productivity on any particular geographical site would be most likely achieved by strains native to that region. However, direct assessment of that hypothesis remains challenging. Here we isolated and biochemically characterized twenty-six microalgal strains from one of the regions with the highest irradiances of the planet. Biomass and lipids productivity of phylogenetically-close Scenedesmus strains native to regions of contrasting irradiances performed similarly under laboratory culture conditions. Culture simulations in environmental photobioreactors, mimicking regional weather conditions, broadly showed physiological responses of these strains according to their origin. However, under the mean weather conditions of a predicted highly productive region, an exotic strain from a lower irradiance zone resulted 40% more productive than a phylogenetically close-relative native strain. These results challenge the generalized view of the convenience of using native microalgae to increase productivity and broadens the discussion towards alternative scenarios.

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Section: Introductionmentioning

confidence: 78%

Section: Comparison Of Biomass Productivity Of Selected Native Strains From Lowor High-irradiance Geographical Sitesmentioning

confidence: 99%

Section: Comparison Of Biomass Productivity Of Selected Native Strains From Lowor High-irradiance Geographical Sitesmentioning

confidence: 99%

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Effect of matching microalgal strains origin and regional weather condition on biomass productivity in environmental photobioreactors

Coronel

Nascimento

Curatti

2019

Bioresource Technology Reports

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“…Our work adds to a growing body of research on how heat stress affects psychrophilic eukaryotes (Hwang, Jung & Jin 2008;Chong, Chu, Othman & Phang 2011;Possmayer et al 2011;Boo et al 2013;Suet al 2016;Barati, Lim, Gan, Poong & Phang 2018;Poonget al 2018), a topic that is particularly relevant given recent trends in climate change. The Antarctic continent is one of the most rapidly warming locations on Earth (Chapman & Walsh 2007).…”

Section: Resultsmentioning

confidence: 89%

Constitutively Up-regulated Carbon Metabolism is an Adaptation to Low Temperature in the Antarctic Psychrophile Chlamydomonas sp. UWO241

Cvetkovska

Szyszka‐Mroz

Malczewski

et al. 2021

Preprint

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The Antarctic alga Chlamydomonas sp. UWO241 is an obligate psychrophile that thrives in the cold but is unable to survive at moderate, seemingly innocuous temperatures. We dissect the responses of UWO241 to temperature stress using global metabolomic approaches. UWO241 exhibits slow growth at 4°C, a temperature closest to its natural habitat, and faster growth at higher temperatures of 10-15°C. We demonstrate that the slower growth-rate characteristic of UWO241 at 4⁰C is not necessarily a hallmark of stress. UWO241 constitutively accumulates high levels of protective metabolites including soluble sugars, polyamines and antioxidants at a range of steady-state temperatures. In contrast, the mesophile Chlamydomonas reinhardtii accumulates these metabolites only during cold stress. Despite low growth rates, 4°C-grown UWO241 cultures had a higher capacity to respond to heat stress (24°C) and accumulated increased amounts of antioxidants, lipids and soluble sugars, when compared to cultures grown at 10-15°C. We conclude that the slower growth rate and the unique psychrophilic physiological characteristic of UWO241 grown at 4⁰C result in a permanently re-routed steady-state metabolism, which contributes to its increased resistance to heat stress. Our work adds to the growing body of research on temperature stress in psychrophiles, many of which are threatened by climate change.

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“…Allelopathic damage to the PSII systems is also suggested by the responses of the genes located in the D1-D2 protein [54,82]. PsbA and PsbD, encoding the D1 and D2 subunits of the PSII complex, constitute the heterodimeric photochemical reaction center [80].…”

Section: Discussionmentioning

confidence: 99%

Allelopathic Inhibition by the Bacteria Bacillus cereus BE23 on Growth and Photosynthesis of the Macroalga Ulva prolifera

Zhang

Zhao

et al. 2020

JMSE

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Bacteria-derived allelopathic effects on microalgae blooms have been studied with an aim to develop algicidal products that may have field applications. However, few such studies have been conducted on macroalgae. Therefore, a series of experiments was conducted to investigate the impacts of different concentrations of cell-free filtrate of the bacteria Bacillus cereus BE23 on Ulva prolifera. Excessive reactive oxygen species (ROS) were produced when these cells were exposed to high concentrations of filtrate relative to f/2 medium. In such conditions, the antioxidative defense system of the macroalga was activated as shown by activities of the enzymes superoxide dismutase (SOD) and catalase (CAT) and upregulation of the associated genes upMnSOD and upCAT. High concentrations of filtrate also inhibited growth of U. prolifera, and reduced chlorophyll a and b, the photosynthetic efficiency (Fv/Fm), and the electron transport rate (rETR). Non-photochemical quenching (NPQ) was also inhibited, as evidenced by the downregulation of the photoprotective genes PsbS and LhcSR. Collectively, this evidence indicates that the alteration of energy dissipation caused excess cellular ROS accumulation that further induced oxidative damage on the photosynthesis apparatus of the D1 protein. The potential allelochemicals were further isolated by five steps of extraction and insolation (solid phase–liquid phase–open column–UPLC–preHPLC) and identified as N-phenethylacetamide, cyclo (L-Pro-L-Val), and cyclo (L-Pro-L-Pro) by HR-ESI-MS and NMR spectra. The diketopiperazines derivative, cyclo (L-Pro-L-Pro), exhibited the highest inhibition on U. prolifera and may be a good candidate as an algicidal product for green algae bloom control.

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Gene expression profile of marine Chlorella strains from different latitudes: stress and recovery under elevated temperatures

Cited by 9 publications

References 63 publications

Effect of matching microalgal strains origin and regional weather condition on biomass productivity in environmental photobioreactors

Effect of matching microalgal strains origin and regional weather condition on biomass productivity in environmental photobioreactors

Constitutively Up-regulated Carbon Metabolism is an Adaptation to Low Temperature in the Antarctic Psychrophile Chlamydomonas sp. UWO241

Allelopathic Inhibition by the Bacteria Bacillus cereus BE23 on Growth and Photosynthesis of the Macroalga Ulva prolifera

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