photosystem I (in Stroma) or photosystem II (in Granna)?
chlorophyll a or chlorophyll b?
Because of the formation of radicals ions like plastosemiquinone, photosystem 2, linked to water oxidation, is more sensitive to abiotic stress than photosystem 1. Notice also that ATP-synthase is affected by drought (FEBS Letters, 1992, 303, 233-236).
The salt, water, chilling and drought stress negatively affect on photosystem II and chlorophyll a.
Hello Faride Noroozi shahri, perhaps you will find good answers in this link, you just need to download the epub or pdf version to read the research topic.
regards
www.frontiersin.org/research-topics/5623/structure-and-function-of-chloroplasts
Because of the formation of radicals ions like plastosemiquinone, photosystem 2, linked to water oxidation, is more sensitive to abiotic stress than photosystem 1. Notice also that ATP-synthase is affected by drought (FEBS Letters, 1992, 303, 233-236).
Please note that PSII damage plays a physiological role, while PSI damage needs to be prevented.
Article Photosystem II photoinhibition-repair cycle protects Photosy...
PSII is more sensitive to abiotic stress. However, PSI can be photoinhibited in differend abiotic stress conditions as flutuating light, salinity etc...Please check:
[1] J.V.A. Cerqueira, J.A.G. Silveira, F.E.L. Carvalho, J.R. Cunha, M.C. Lima Neto, The regulation of P700 is an important photoprotective mechanism to NaCl-salinity in Jatropha curcas, Physiol. Plant. (2019). doi:10.1111/ppl.12908.
M. Zivcak, M. Brestic, K. Kunderlikova, O. Sytar, S.I. Allakhverdiev, Repetitive light pulse-induced photoinhibition of photosystem I severely affects CO2 assimilation and photoprotection in wheat leaves, Photosynth. Res. 126 (2015) 449–463. doi:10.1007/s11120-015-0121-1.
T. Sejima, D. Takagi, H. Fukayama, A. Makino, C. Miyake, Repetitive short-pulse light mainly inactivates photosystem i in sunflower leaves, Plant Cell Physiol. 55 (2014) 1184–1193. doi:10.1093/pcp/pcu061.
D. Takagi, S. Takumi, M. Hashiguchi, T. Sejima, C. Miyake, Superoxide and Singlet Oxygen Produced within the Thylakoid Membranes Both Cause Photosystem I Photoinhibition, Plant Physiol. 171 (2016) 1626–1634. doi:10.1104/pp.16.00246.
M. Kono, I. Terashima, Elucidation of Photoprotective Mechanisms of PSI Against Fluctuating Light photoinhibition, Plant Cell Physiol. 57 (2016) 1405–1414. doi:10.1093/pcp/pcw103.
Mostly PS-II and Chl- a are more sensitive to stress because under stress conditions. ROS responsible for membrane breakdown so different ROS breakdown the thylakoid membrane, PS- II are located in thylakoid membrane so its effect most while chl- a is in reaction center of PS- II so its more sensitive .
PSII is more sensitive for most of the adverse conditions. Remember that PSII photoinhibition can also be a photoprotective mechanism, not only a consequence of PSII damage.
Although more sensitive, PSII recovers much faster than PSI and this is why PSI damage is usually said to be more harmful than PSII damage.
Lima-Melo, Y., Gollan, P.J., Tikkanen, M., Silveira, J.A.G. and Aro, E.-M. (2019) Consequences of photosystem-I damage and repair on photosynthesis and carbon use in Arabidopsis thaliana. Plant J. 97, 1061 – 1072.
Barth, C., Krause, G.H. and Winter, K. (2001) Responses of photosystem I compared with photosystem II to high-light stress in tropical shade and sun leaves. Plant, Cell Environ. 24, 163 – 176.
Huang, W., Zhang, S.B. and Cao, K.F. (2010) The different effects of chilling stress under moderate illumination on photosystem II compared with photosystem I and subsequent recovery in tropical tree species. Photosynth. Res. 103, 175 – 182.
Li, X.-G., Wang, X.-M., Meng, Q.-W. and Zou, Q. (2004) Factors limiting photosynthetic recovery in sweet pepper leaves after short-term chilling stress under low irradiance. Photosynthetica, 42, 257 – 262.
Zhang, S. and Scheller, H.V. (2004) Photoinhibition of photosystem I at chilling temperature and subsequent recovery in Arabidopsis thaliana. Plant Cell Physiol. 45, 1595 – 1602.
Sonoike, K. (2011) Photoinhibition of photosystem I. Physiol. Plant. 142, 56 – 64.
Zhang, Z., Jia, Y., Gao, H., Zhang, L., Li, H. and Meng, Q. (2011) Characterization of PSI recovery after chilling-induced photoinhibition in cucumber (Cucumis sativus L.) leaves. Planta, 234, 883 – 889.
Tikkanen, M. and Grebe, S. (2018) Switching off photoprotection of photosystem I – a novel tool for gradual PSI photoinhibition. Physiol. Plant. 162, 156 – 161.
Photosystem II and chlorophyll a, also please see the attached papers.
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