Growth and photosynthesis acclimated response of the cyanobacterium Fischerella sp. FS 18 exposed to extreme conditions: alkaline pH, limited irradiance, and carbon dioxide concentration

Shokravi, Shadman; Bahavar, Nadia

doi:10.1007/s00792-021-01244-x

Cited by 4 publications

(10 citation statements)

References 41 publications

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“…Cyanobacteria are a self-sufficient system that is widely distributed across terrestrial and aquatic environments; and terrestrial cyanobacteria plays a fundamental role in the biological cycle of agriculture (Mareš et al 2014 ; Shokravi and Bahavar 2021a ). They produce various bio-available elements such as Nitrogen and phosphorus, which are the essential nutrients for plant cultivation (Chittora et al 2020 ).…”

Section: Introductionmentioning

confidence: 99%

“…Nearly nothing is known about the mechanisms of cellular survival, cell stability, or growth of cyanobacteria under extreme alkaline conditions (Jangir et al 2021 ). Elevated pH (alkalinity) directly influences growth rate and cell yield (de Souza Santos et al 2011 ; Shokravi and Bahavar 2021a , b ), enzyme activity (Li et al 2013 ), biosorption (El-Din 2017 ), resistance to oxidative stress (Summerfield et al 2013 ), and protection (Pathak et al 2018 ). It also strongly affects the cyanobacterial abundance (Krausfeldt et al 2019 ; Nguyen and Rittmann 2015 ).…”

Section: Introductionmentioning

confidence: 99%

“…It also strongly affects the cyanobacterial abundance (Krausfeldt et al 2019 ; Nguyen and Rittmann 2015 ). While in some cyanobacteria, the growth decreased with the increasing alkalinity (Shokravi and Bahavar 2021a ). Therefore, evaluation the effects of different pHs on cyanobacteria is important.…”

Section: Introductionmentioning

confidence: 99%

“…Time (age of the culture) is another essential factor in the resistance and growth in different conditions (Alcorta et al 2019 ) which less has been considered (Bouazzara et al 2020 ; Jangir et al 2021 ). Exposure to initial hours of new condition may create a significant effect on physiological activities during the next hours (Abbasi et al 2019 ; Shokravi and Bahavar 2021a ). However, there is increasing evidence that the combined environmental factors can be modulated by other factors and led to regulation, acclimation, and adaptation (Müller et al 1993 ; Shokravi and Bahavar 2021a ).…”

Section: Introductionmentioning

confidence: 99%

“…Exposure to initial hours of new condition may create a significant effect on physiological activities during the next hours (Abbasi et al 2019 ; Shokravi and Bahavar 2021a ). However, there is increasing evidence that the combined environmental factors can be modulated by other factors and led to regulation, acclimation, and adaptation (Müller et al 1993 ; Shokravi and Bahavar 2021a ). Therefore, studying environmental fluctuations in the short-time regime on cyanobacteria is essential to serve the sustainable development economy in the future.…”

Section: Introductionmentioning

confidence: 99%

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Acclimation response and ability of growth and photosynthesis of terrestrial cyanobacterium Cylindrospermum sp. strain FS 64 under combined environmental factors

Bahavar

Shokravi

2022

Arch Microbiol

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This investigation tested the hypothesis that the native cyanobacteria can acclimatize and grow under the combination of environmental factors and/or how does their process change with the age of culture? Here, we tried to combine multiple factors to simulated what happens in natural ecosystems. We analyzed the physiological response of terrestrial cyanobacterium, Cylindrospermum sp. FS 64 under combination effect of different salinity (17, 80, and 160 mM) and alkaline pHs (9 and 11) at extremely limited carbon dioxide concentration (no aeration) up to 96 h. Our evidence showed that growth, biomass, photosystem II, and phycobilisome activity significantly increased under 80 mM salinity and pH 11. In addition, this combined condition led to a significant increase in maximum light-saturated photosynthesis activity and photosynthetic efficiency. While phycobilisomes and photosystem activity decreased by increasing salinity (160 mM) which caused decreased growth rates after 96 h. The single-cell study (CLMS microscopy) which illustrated the physiological state of the individual and active-cell confirmed the efficiency and effectiveness of both photosystems and phycobilisome under the combined effect of 80 mM salinity and pH 11.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acclimation response and ability of growth and photosynthesis of terrestrial cyanobacterium Cylindrospermum sp. strain FS 64 under combined environmental factors

Bahavar

Shokravi

2022

Arch Microbiol

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The Effect of Short Term Alkalinity on Photosynthesis Apparatus in Soil Cyanobacterium Fischerella sp. FS 18 - Ecophysiological Approach

et al. 2023

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The possibility of change in the phycobilisome status, photosynthetic pigments, ratios and light parameters of soil cyanobacteria <i>Fischerella</i> sp. FS 18 has been investigated by two pre-treatment factors, with neutral and extreme alkaline pH (7 and 9) over a short period. After purification, cyanobacteria were subjected to extreme alkaline treatment for under one hour at 20 min intervals (20, 40 and 60 min). A sample was selected as a control without pre-treatment. Colorimetric assays (phycocyanin, alophycocyanin, phycoerythrin, chlorophyll) and a comparison of the combined effect of time and alkalinity on photosystemic ratios were performed through photophysiology. The photosynthesis - light curves were compared with direct measurements. The results showed that the combination of time and alkalinity after 20 min of inoculation significantly increased the performance of the photosystem and stability of the phycobilin system. The 40 min time interval, under both neutral and alkaline conditions, significantly increased the yield of photosystem II, increased the production of the first photosystem compared to the second system, increased the linear fraction of the photosynthesis-light curve, and reduced the energy needed to achieve maximum photosynthesis. Maximal photosynthesis was entirely different at 40 min pretreatment conditions versus without pretreatment. Concerning the 20 and 60 min time intervals, the results show no specific regularity or trend. Production of light collecting antennas is influenced by both time and alkalinity. Two important conclusions from this study include: applying pre-treatment times, even at 60 min or less, cause a significant change in the structure and performance of the photosynthetic apparatus; as well as,-using simple alkaline pretreatments in a very short time period, saving energy whilst, photosynthesis and cyanobacterial materialization can be significantly increased.

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Photosynthesis Versatility in Under One-Hour of Salinity Treatment in the Cyanobacterium Fischerella ambigua str. FS18

Tahri,

Shokravi,

Ebadi

et al. 2023

Inter J Algae

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The effect of salinity (80 and 160 mM) was studied on the photosynthetic apparatus of the native cyanobacterium <i>Fischerella ambigua</i> str. FS 18 over a limited time scale (20, 40, and 60 min). 160 mM salinity for 40 and 60 min had stimulating effects on the photosystem II and phycobilisomes. 80 mM treatment for 20 and 40 min had an excitatory impact on the photosystem and phycobilisome yet were destructive by 60 min for both. The stimulatory and harmful effects of salinity and time are more than that of the sample under conditions without increasing salinity). The photosystem ratios play a key role in damages. 80 mM salinity for 20 min increases the photosystem ratio (PSII : PSI) from 1.24 to 3.28. Similarly, a salinity shock of 160 mM for 20 min reduces the photosystem ratio from 1.24 to 0.34. Photosystem ratios can be determined as pinpointsin the effects of short-time salinity treatments.

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Growth and photosynthesis acclimated response of the cyanobacterium Fischerella sp. FS 18 exposed to extreme conditions: alkaline pH, limited irradiance, and carbon dioxide concentration

Cited by 4 publications

References 41 publications

Acclimation response and ability of growth and photosynthesis of terrestrial cyanobacterium Cylindrospermum sp. strain FS 64 under combined environmental factors

Acclimation response and ability of growth and photosynthesis of terrestrial cyanobacterium Cylindrospermum sp. strain FS 64 under combined environmental factors

The Effect of Short Term Alkalinity on Photosynthesis Apparatus in Soil Cyanobacterium Fischerella sp. FS 18 - Ecophysiological Approach

Photosynthesis Versatility in Under One-Hour of Salinity Treatment in the Cyanobacterium Fischerella ambigua str. FS18

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