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maximum fluorescence intensity (F M ). The chlorophyll a fluorescence emission was induced by the strong light pulses and then was determined and digitized between 10 μs and 320 ms. The OJIP curve was analyzed by the JIP test as described in Table 1

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., 2008 ). The kinetic transient fluorescence shows a polyphasic fluorescence rise consisting of a sequence of phases, denoted as O, J, I, and P [OJIP test ( Strasser and Tsimilli-Michael, 2001 )]. In our study, OJIP measurements were taken at ≈0930 hr

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, compared with the control. OJIP fluorescence transient and parameter analysis. The chlorophyll a fluorescence transient test was used to determine the effect of moderate shading on the photochemistry of PSII of bermudagrass leaves treated with

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excitation fluorometer (Handy-PEA; Hansatech, UK) in mid-May. The leaves were first adapted in the dark for 30 min, then exposed to saturated, pulsed light. The fast fluorescence kinetic induction curves (OJIP) were measured with the Handy-PEA and analyzed

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statistical differences at P < 0.05 among the treatments according to Duncan’s multiple range tests. Photosynthesis system. OJIP fluorescence transient was analyzed to examine the impact of NO on photosynthesis system. In our study, the OJIP curves dropped

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recorded and used as original data in the OJIP-test ( Strasser and Tsimilli-Michael, 2001 ). These include the F m (step P), the fluorescence intensity at 50 μs [ F 0 (step O)], 100 μs ( F 100 ), 300 μs ( F 300 ), 2 ms (step J), and 30 ms (Step I). In Dec

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standard (purity 98.6%, gas chromatography–mass spectrometry certified) was purchased from CHMSRV-PM (Westchester, NY). The test solutions were prepared by a serial dilution of a stock solution of 1 mg·L −1 BDE-47 dissolved in N,N-dimethylformamide (DMF

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determination of the maximal quantum yield of PSII (Fv/Fm) ( Pinior et al., 2005 ). Fluorescence values at time intervals corresponding to the step O-J-P were recorded and used as original data in the OJIP-test ( Strasser and Tsimilli-Michael, 2001 ). These

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the OJIP test. Cold RZT induced inhibition in all the parameters. The F v /F m values of tomato plants exposed to 10 °C root temperature at stage 1 decreased significantly in relation to the values of control plants (20 °C), indicating an inhibition

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replicated measurements were conducted for determination of photosynthetic parameters and used to calculate sd s. A t test was used to compare the measurement of yellow vine leaves with the measurement of normal cranberry leaves to decide whether they are

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