Photosynthetic Responses of Plants to Excess Light: Mechanisms and Conditions for Photoinhibition, Excess Energy Dissipation and Repair

Allahverdiyeva, Yagut; Aro, Eva‐Mari

doi:10.1007/978-94-007-1579-0_13

Cited by 25 publications

(18 citation statements)

References 175 publications

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“…This acute inhibition of primary processes in BSC could be attributed to high PAR values and low availability of water. However, interactions with other factors that may result in an increased sensitivity to photoinhibition may not be omitted since some of them may play a role even at low light (Allahverdiyeva et Aro 2012). In lichens from cold Earth regions, primary photochemical processes of photosynthesis in photosystem II (PS II) and thylakoid membrane of a chloroplast are effective at low above-zero temperature.…”

Section: Discussionmentioning

confidence: 99%

Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard)

Sehnal¹,

Barták²,

Váczi³

2014

Czech Polar Rep.

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In polar ecosystems, primary producers have to cope with a very harsh climate that limits the time available for growth and biomass production. In this study, diurnal measurement of photosynthetic processes in biological soil crust and a lichen were carried out in Petuniabukta, Spitsbergen. For field measurements, a method of induced fluorescence of chlorophyll was used. Measurements of photosynthetic activity were taken as repetitive measurements of effective quantum yield of photosystem II (Φ PSII ). The short-term field measurements were carried out for 10 days in summer 2014. Φ PSII was recorded each 5 minutes as well as microclimatic data (air temperature, air humidity, photosynthetically active radiation -PAR). The microclimatic parameters were recorded by a datalogger. In general, physiological activity of both biological soil crust and a lichen showed daily courses. Tested lichen was Cladonia rangiferina and the most dominant species in biological soil crust was Nostoc sp. Typically, most of Φ PSII values ranged 0.6 -0.7 in both model organisms. The results have shown that photosynthetic activity was strongly correlated with all observed abiotic factors in both study objects. Particularly important was the relation found between PAR and Φ PSII in biological soil crust. When the biological soil crust was exposed to high PAR doses of irradiation (about 2300 µmol m -2 s -1 ) photoinhibition of primary processes of photosynthesis was observed as Φ PSII decrease, while photosynthetic activity of lichen remained at same level. Furthermore, it has been demonstrated increasing that in situ photosynthetic activity increased in both biological soil crust and lichen with a decrease in temperature.

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Section: Discussionmentioning

confidence: 99%

Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard)

Sehnal¹,

Barták²,

Váczi³

2014

Czech Polar Rep.

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“…Exposure of plant leaves to light levels in excess of what can be utilized in photosynthesis often results in a decline in photosynthetic activity or destruction in the photosynthetic apparatus. This high-intensity light effect is known as photoinhibition (Allahverdieva and Aro, 2012;Ohad et al, 2011). Numerous experiments prove that photoinhibition can also be induced by low light (Tyystjärvi, 2013).…”

Section: Discussionmentioning

confidence: 99%

Function of terahertz spectra in monitoring the decomposing process of biological macromolecules and in investigating the causes of photoinhibition

Zhang

Lian

Kuang

2016

Sci. China Life Sci.

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Chlorophyll a and -carotene play an important role in harvesting light energy, which is used to drive photosynthesis in plants. In this study, terahertz (THz) and visible range spectra of chlorophyll a and -carotene and their changes under light treatment were investigated. The results show that the all THz transmission and absorption spectra of chlorophyll a and -carotene changed upon light treatment, with the maximum changes at 15 min of illumination indicating the greatest changes of the collective vibrational mode of chlorophyll a and -carotene. The absorption spectra of chlorophyll a in the visible light region decreased upon light treatment, signifying the degradation of chlorophyll a molecules. It can be inferred from these results that the THz spectra are very sensitive in monitoring the changes of the collective vibrational mode, despite the absence of changes in molecular configuration. The THz spectra can therefore be used to monitor the decomposing process of biological macromolecules; however, visible absorption spectra can only be used to monitor the breakdown extent of biological macromolecules.chlorophyll a, -carotene, light, terahertz spectra Citation:Qu, Y., Zhang, S., Lian, Y., and Kuang, T. (2017). Function of terahertz spectra in monitoring the decomposing process of biological macromolecules and in investigating the causes of photoinhibition. Sci China Life Sci 60, 307 -312.

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“…This excess can cause photoinhibition of the reaction centres of PSII (Allahverdiyeva and Aro, 2012). While photoinhibition is reversible, full recovery may take hours (Campbell and Tyystjärvi, 2012) and can inhibit CO2 assimilation (Hikosaka et al, 2004).…”

Section: The Physiology Of Photosynthesis In Plantsmentioning

confidence: 99%

“…While photoinhibition is reversible, full recovery may take hours (Campbell and Tyystjärvi, 2012) and can inhibit CO2 assimilation (Hikosaka et al, 2004). Different strategies may be used by the system to reduce photoinhibition (Allahverdiyeva and Aro, 2012), of which non-photochemical quenching (NPQ) is considered one of the most important (Kramer et al, 2004a). NPQ consists of a regulated increase in the dissipation of excitations as heat in PSIIac, such that a smaller fraction of the energy reaches the reaction centre.…”

Section: The Physiology Of Photosynthesis In Plantsmentioning

confidence: 99%

“…The process of PSII repair consists of several steps: (i) degradation of damaged protein D1, (ii) synthesis de novo of protein D1, and (iii) assembly of new PSII units (Aro et al, 1993). Several proteases participate in the degradation of protein D1, including two main families: Deg and FtsH proteases (Allahverdiyeva and Aro, 2012). Failure to slow down PSII repair in A. thaliana by knocking out a specific Deg protease has been interpreted as the coexistence of multiple pathways for protein D1 degradation (Huesgen et al, 2006), which would make identifying specific targets difficult.…”

Section: Photoinhibitionmentioning

confidence: 99%

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Dynamic photosynthesis under a fluctuating environment: a modelling-based analysis

Sierra

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Photosynthetic Responses of Plants to Excess Light: Mechanisms and Conditions for Photoinhibition, Excess Energy Dissipation and Repair

Cited by 25 publications

References 175 publications

Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard)

Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard)

Function of terahertz spectra in monitoring the decomposing process of biological macromolecules and in investigating the causes of photoinhibition

Dynamic photosynthesis under a fluctuating environment: a modelling-based analysis

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