Effects of high temperature and low pH on photosystem 2 photochemistry in spinach thylakoid membranes

Mathur, Sonal; Singh, Pooja; Mehta, Pooja; Jajoo, Anjana

doi:10.1007/s10535-011-0180-x

Cited by 6 publications

(3 citation statements)

References 32 publications

(23 reference statements)

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“…The JIP-test is a valid and rapid technique to investigate the plant photosynthetic functions regarding the structure and behavior of PSII based on the theory of energy flux in biomembrane (Strasser et al 2004). Abiotic stresses, such as temperature (Chen and Cheng 2009, Mathur et al 2011, Snider et al 2018, heavy metal (Appenroth et al 2001, Li et al 2010, salt (Lu et al 2003), and drought (Shao et al 2010, Rapacz et al 2019, altered the shape of the OJIP transient. In our study, the more pronounced decrease of fluorescence yield by Al stress was found in C. grandis leaves than that of C. sinensis (Fig.…”

Section: Discussionmentioning

confidence: 99%

Special issue in honour of Prof. Reto J. Strasser - The photosynthetic performance of two Citrus species under long-term aluminum treatment

Zhang¹,

Li²,

Chen³

et al. 2020

Photosynt.

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The effect of Al stress on leaf pigment contents, chlorophyll (Chl) a fluorescence transient, and leaf gas exchange of Citrus sinensis and Citrus grandis were investigated in sandy culture with nutrient solution (control) or supplemented by 0.5 mM AlCl3•6H2O (Al toxic) for 54 weeks. We found a significant decline of Chl a, carotenoids (Car), Ch a/b, and Car/Chl (a+b) in C. grandis caused by Al stress. Except the significant increase of Car/Chl (a+b), no remarkable difference was found in C. sinensis. The Al-induced downregulation of CO2 assimilation was related to the imbalance of reduction and oxidation of primary quinone acceptor of PSII in two Citrus species. Compared to C. grandis, increasing ratio of Car/Chl (a+b) for photooxidation protection and decreasing inhibition of electron transfer contributed to electron conversion efficiency maintenance of PSII under Al stress in C. sinensis, a relatively Al-tolerant species.

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Section: Discussionmentioning

confidence: 99%

Special issue in honour of Prof. Reto J. Strasser - The photosynthetic performance of two Citrus species under long-term aluminum treatment

Zhang¹,

Li²,

Chen³

et al. 2020

Photosynt.

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“…when all Q A is reduced. An increase in the F 0 value may occur due to many combined processes, such as functional disconnection of LHCII from the PSII complex or accumulation of inactive RCs (Mathur et al 2011). The Area above the fluorescence curve between F 0 and F m is proportional to the pool size of the electron acceptors Q A on the reducing side of PSII.…”

Section: Relative Chl Contentmentioning

confidence: 99%

Impact of intraspecific competition on photosynthetic apparatus efficiency in potato (Solanum tuberosum) plants

Olechowicz¹,

Chomontowski²,

Olechowicz³

et al. 2018

Photosynt.

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Unfavourable growth conditions significantly determine the yield of crop plants. Intraspecific competition is a condition in which plants compete with each other for environmental resources. An excessive density contributes to increased competition within species, which results in disruption of photosynthesis process. According to this idea, experiments were conducted to investigate the photosynthetic response of potato (Solanum tuberosum) plants to excessive congestion. Two potato varieties of different earliness classes (Vineta and Satina) were used to evaluate the efficiency of the photosynthetic apparatus based on chlorophyll (Chl) fluorescence measurements under stress conditions. Changes in Chl contents of the tested plants were also analysed. In relation to intraspecific competition, we can conclude that the Vineta variety was less sensitive to this stress factor. In contrast, the photosynthetic apparatus of the Satina variety showed less efficient functioning under these conditions. In this study, the application of Chl fluorescence was presented for the first time in order to analyse the effects of intraspecific competition in plants.

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“…Chlorophyll is another molecule that can be used to evaluate the status of a microalgae culture. This pigment, which is an effective indicator of the physiological state of the photosynthetic apparatus, can be conveniently deactivated and degraded by changes in temperature and pH since it is very sensitive to these factors [125,126]. A recent study, carried out by Takahashi, assessed a new method to quantify a Chlorella population and its status based on chlorophyll integrity, using an image-based cell counter with a fluorescent filter for chlorophyll detection [127].…”

Section: Biomarkers: Indicators Of Microalgal Culture Statusmentioning

confidence: 99%

Microalgae culture quality indicators: a review

Bermejo

Filali

Taidi

2021

Critical Reviews in Biotechnology

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Microalgae are photosynthetic microorganisms that have generated increasing interest in recent years due to their potential applications. Their biological capacity to grow faster than higher plants and their ability to convert solar energy into biomass and other bioactive molecules, has led to the development of various culture systems in order to produce different high-value products with commercial interest. The industrialization of the microalgae cultivation process requires the introduction of standardized quality parameters. In order to obtain bioactive compounds with high added value at a commercial level, it is necessary to sustainably produce biomass at a large scale. Such a process would imply specific stress conditions, such as variation in temperature, light or pH. These environmental conditions would make it more difficult to maintain the viability of the culture and protect the yield and condition of the target molecules. The physiological and biochemical impact of these stress factors on the microalgae biomass can be potentially measured by the presence and activity of various biochemical indicators called biomarkers. This review presents an overview of the main techniques that exist for assessing the "quality" of microalgae cultures through quantification of cell viability and vitality by monitoring specific markers indicative of the status of the culture.

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Effects of high temperature and low pH on photosystem 2 photochemistry in spinach thylakoid membranes

Cited by 6 publications

References 32 publications

Special issue in honour of Prof. Reto J. Strasser - The photosynthetic performance of two Citrus species under long-term aluminum treatment

Special issue in honour of Prof. Reto J. Strasser - The photosynthetic performance of two Citrus species under long-term aluminum treatment

Impact of intraspecific competition on photosynthetic apparatus efficiency in potato (Solanum tuberosum) plants

Microalgae culture quality indicators: a review

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