Temperature-dependent growth rate and photosynthetic performance of Antarctic symbiotic alga Trebouxia sp. cultivated in a bioreactor

Balarinová, Kateřina; Váczi, Peter; Barták, Miloš; Hazdrová, Jana; Forbelská, Marie

doi:10.5817/cpr2013-1-4

Cited by 12 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It indicates that 23°C is well above the survival temperature for all the photobionts in this study and 15°C is about the upper limit for the two highly specialized lichen species, which only occur with a narrow distribution range in the Antarctic. The finding is in line with other studies indicating a possible adaptation of Antarctic photobionts to colder growing conditions (Balarinová, Váczi, Barták, Hazdrová, & Forbelská, ). Photobiont death makes it difficult to interpret changes in NP/R, especially at 23°C, but also partly at 15°C for the two temperature‐sensitive lichen species.…”

Section: Discussionsupporting

confidence: 92%

Can Antarctic lichens acclimatize to changes in temperature?

Colesie

Büdel

Hurry

et al. 2017

Global Change Biology

View full text Add to dashboard Cite

The Antarctic Peninsula, a tundra biome dominated by lichens and bryophytes, is an ecozone undergoing rapid temperature shifts. Such changes may demand a high physiological plasticity of the local lichen species to maintain their role as key drivers in this pristine habitat. This study examines the response of net photosynthesis and respiration to increasing temperatures for three Antarctic lichen species with different ecological response amplitudes. We hypothesize that negative effects caused by increased temperatures can be mitigated by thermal acclimation of respiration and/or photosynthesis. The fully controlled growth chamber experiment simulated intermediate and extreme temperature increases over the time course of 6 weeks. Results showed that, in contrast to our hypothesis, none of the species was able to down-regulate temperature-driven respiratory losses through thermal acclimation of respiration. Instead, severe effects on photobiont vitality demonstrated that temperatures around 15°C mark the upper limit for the two species restricted to the Antarctic, and when mycobiont demands exceeded the photobiont capacity they could not survive within the lichen thallus. In contrast, the widespread lichen species was able to recover its homoeostasis by rapidly increasing net photosynthesis. We conclude that to understand the complete lichen response, acclimation processes of both symbionts, the photo- and the mycobiont, have to be evaluated separately. As a result, we postulate that any acclimation processes in lichen are species-specific. This, together with the high degree of response variability and sensitivity to temperature in different species that co-occur spatially close, complicates any predictions regarding future community composition in the Antarctic. Nevertheless, our results suggest that species with a broad ecological amplitude may be favoured with on-going changes in temperature.

show abstract

Section: Discussionsupporting

confidence: 92%

Can Antarctic lichens acclimatize to changes in temperature?

Colesie

Büdel

Hurry

et al. 2017

Global Change Biology

View full text Add to dashboard Cite

show abstract

“…The study will focus not only on taxonomy of the mat-forming species, but also on their physiological properties, temperature and irradiation optima during controlled growth in photobioreactors in particular (see e.g. Balarinová et al 2013).…”

Section: Resultsmentioning

confidence: 99%

Biodiversity of freshwater algae and cyanobacteria on deglaciated northern part of James Ross Island, Antarctica. A preliminary study.

Skácelová¹,

Barták²,

Coufalík³

et al. 2013

Czech Polar Rep.

Self Cite

View full text Add to dashboard Cite

The authors thank to the infrastructure of the CzechPolar for providing facilities necessary for sample collection, their storage and handling before microscopic study. Help of Gema Gonzales with microscopic analyses is acknowledged. Daniel Nývlt work of this paper has been supported by the project "Employment of Best Young Scientists for International Cooperation Empowerment" (CZ.1.07/2.3.00/30.0037) co-financed from European Social Fund and the state budget of the Czech Republic. The authors also acknowledge the help provided by Jiří Komárek (Třeboň, CZ) in determination of some cyanobacteria.

show abstract

“…Furthermore, gross oxygen production increased with temperature up to 35 °C in E. mirabilis and to 25 °C in D. epiphytica ( Figure 2 ). Tolerance of low rather than high temperatures has been reported for lichen photobionts [ 52 , 53 ], which are known to be adapted to low PFDs [ 54 ]. A previous study [ 55 ] also reported that two lichen photobionts were more sensitive to light than four strains of free-living algae.…”

Section: Discussionmentioning

confidence: 99%

Metabolite Profiling in Green Microalgae with Varying Degrees of Desiccation Tolerance

et al. 2022

View full text Add to dashboard Cite

Trebouxiophyceae are microalgae occupying even extreme environments such as polar regions or deserts, terrestrial or aquatic, and can occur free-living or as lichen photobionts. Yet, it is poorly understood how environmental factors shape their metabolism. Here, we report on responses to light and temperature, and metabolic adjustments to desiccation in Diplosphaera epiphytica, isolated from a lichen, and Edaphochlorella mirabilis, isolated from Tundra soil, assessed via growth and photosynthetic performance parameters. Metabolite profiling was conducted by GC–MS. A meta-analysis together with data from a terrestrial and an aquatic Chlorella vulgaris strain reflected elements of phylogenetic relationship, lifestyle, and relative desiccation tolerance of the four algal strains. For example, compatible solutes associated with desiccation tolerance were up-accumulated in D. epiphytica, but also sugars and sugar alcohols typically produced by lichen photobionts. The aquatic C. vulgaris, the most desiccation-sensitive strain, showed the greatest variation in metabolite accumulation after desiccation and rehydration, whereas the most desiccation-tolerant strain, D. epiphytica, showed the least, suggesting that it has a more efficient constitutive protection from desiccation and/or that desiccation disturbed the metabolic steady-state less than in the other three strains. The authors hope that this study will stimulate more research into desiccation tolerance mechanisms in these under-investigated microorganisms.

show abstract

Temperature-dependent growth rate and photosynthetic performance of Antarctic symbiotic alga Trebouxia sp. cultivated in a bioreactor

Cited by 12 publications

References 24 publications

Can Antarctic lichens acclimatize to changes in temperature?

Can Antarctic lichens acclimatize to changes in temperature?

Biodiversity of freshwater algae and cyanobacteria on deglaciated northern part of James Ross Island, Antarctica. A preliminary study.

Metabolite Profiling in Green Microalgae with Varying Degrees of Desiccation Tolerance

Contact Info

Product

Resources

About