Psii photochemical efficiency

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August undefined, 2024

WebPhotosystem II (PSII) thermostability and acclimation effects on PSII photochemical efficiency were analyzed in thirty field grown winter wheat (Triticum aestivum L.) genotypes using prompt chlorophyll a fluorescence kinetics before and after dark heat treatment. WebApr 11, 2024 · In this paper, PSII photochemical efficiency (Fv/fm) was measured, and the QY values were shown in Fig. 3 after water stress was simulated on each of the groups of test corn. It can be seen that, when there is a greater degree of water stress, the QY value decreases. After the water stress, QY is restored to 92%, 82%, and 74% of the control ...

Plants Free Full-Text Leaf Gas Exchange and Photosystem II ...

WebContext 1 ... maximum photochemical efficiency of PSII (Fv/Fm) and the effective photochemical efficiency of PSII (ΦPSII) showed a significant decrease in Brigitta and … WebMay 24, 2013 · PSI (Photosystem I) photochemical capacity was not influenced even under severe heat stress at 48°C. Thus, PSI oxidation was prolonged and PSI re-reduction did not reach normal level. The inhibition of electron transport between PSII and PSI can reduce the possibility of PSI photoinhibition under heat stress. coventry jaguar building

Light-induced structural changes and the site of O=O bond

WebPSII assumed values of 0.20 to 0.50 from unscaled values of 0.02 to 0.06 for the early growing season. Our results show that the SIF data product may be analogous to … http://www.phycollab.org/2024/ briarwood ford used trucks

Dissection of Photosynthetic Electron Transport Process in Sweet …

Rate Constants of PSII Photoinhibition and its Repair, and PSII ...

WebJan 29, 2024 · PSII photochemical efficiency (measured from the F v /F m ratio), NPQ, and qL were monitored through in vivo chlorophyll fluorescence determination with the Imaging PAM (Heinz-Walz) 53 or ... Web1 day ago · The parameters included the maximum photochemical efficiency (Fv/Fm) of PSII, the actual photochemical quantum yield of PSII (ΦPSII), non-photochemical … briarwood health and rehab indianapolisWebThe photosynthetic efficiency of plants is directly linked to their ability to convert atmospheric carbon dioxide energy in the form of sugar in a process referred to as carbon fixation. This process, mediated by an enzyme known as RuBisCo, is essential for plant growth and, probably, plant yield. coventry jaguar toronto

"WebSUMMARY We determined the response of photochemical efficiency to desiccation and salinity in an edible brown alga, Saccharina japonica (var. japonica), using a pulse … " - Psii photochemical efficiency

Psii photochemical efficiency

Frontiers Maximal Efficiency of PSII as a Marker of

WebApr 11, 2024 · In this paper, PSII photochemical efficiency (Fv/fm) was measured, and the QY values were shown in Fig. 3 after water stress was simulated on each of the groups of … WebMaximal photochemical efficiency of PSII (Fv/Fm, A), the effective quantum yield of PSII photochemistry (ΦPSII, B), photochemical quenching coefficient (qP, C), the maximum …

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WebMar 2, 2024 · The mechanism of O=O bond formation, however, remains obscure owing to the lack of intermediate-state structures. Here we describe the structural changes in PSII … WebApr 11, 2024 · The reductions in the photochemical efficiency of PSII (ΦPSII) at 400 μmol mol −1 external CO 2 levels caused by the cycling of CO 2 concentration, which occurred in four of the five species examined, provide a new explanation of reduced photosynthesis rates for a given sub-stomatal CO 2 concentration, which has frequently been reported in ...

WebApr 1, 2000 · Photochemical processes Photochemical quenching parameters always relate to the relative value of F m ′ and Ft. The most useful is the parameter that measures the efficiency of Photosystem II photochemistry, Φ PSII ( Genty et al ., 1989 ). This is calculated as: Φ P S I I = ( F m ′ − F t) / F m ′ 1 WebJun 3, 2024 · In general, the maximum quantum yield of the PSII (F v /F m) describes the maximum efficiency for an absorbed photon to induce a photochemical event at the …

WebIt also can lower the efficiency of photosynthetic electron transport by disrupting photochemical conversion in photosystemII (PSII) (Sun et al., 2012;Wang et al., 2014aWang et al., , 2014b Wang ... WebApr 11, 2024 · The OsRCAOE lines showed significantly higher initial Rubisco activity and activation state, net photosynthetic rate, and PSII photochemical quantum yield than …

Web1 day ago · The parameters included the maximum photochemical efficiency (Fv/Fm) of PSII, the actual photochemical quantum yield of PSII (ΦPSII), non-photochemical quenching (NPQ), and apparent electron transfer efficiency (ETR). There were six repeats in each treatment. 4.5. Relative Water Content of the Leaves.

WebFeb 16, 2024 · The expression of performance index PI ABS is the product of three independent characteristics: the density of active RC per PSII antenna chlorophyll … briarwood health and rehab tucker gaWebOct 28, 2024 · Experiment 1: the effects of emersion under 50% humidity on PSII photochemical efficiency and its recovery following seawater rehydration. The samples … coventry jewellers town centreWebThe obtained results indicate that the maximal efficiency of PSII in sorghum plants is a non-destructive method for defining the degree of growth and may be used as a marker of … coventry jaguar parts ukWebApr 20, 2024 · The parameter of maximum photochemical efficiency of PSII (the ratio of variable (Fv) to maximum (Fm) fluorescence, Fv/Fm) is commonly used as an indicator of the photosynthetic capacity and ... briarwood health and rehabilitation center gaWebUnder a growth light of 10-65 µmol photons m -2 s -1 with a broader spectral range, the PSI:PSII ratio is ∼2.5:1 in Synechocystis ( Fraser et al., 2013 ). Therefore, a FractionPSII of 0.29 (i.e., 1/3.5) was used to calculate ETRPSII in the empty-vector control grown at 25 µmol photons m -2 s -1. briarwood health and rehab reviewsWebSep 1, 2001 · PSII quantum efficiency was measured as described above. The rate of non‐cyclic electron transport associated with Rubisco and its partitioning to CO 2 assimilation and photorespiration were calculated ( Ghashghaie and Cornic, 1994 ). briarwood health associatesWebUnder high irradiance, the maximum Pn and ETR were reached at 24 °C. Increased irradiance decreased the PSII operating efficiency and increased NPQ, while both high irradiance … coventry jaguar parts