Method for confirming actinic light intensity in chlorophyll fluorescence induction curve measurement
A technology for determining the method of chlorophyll fluorescence, which is applied in the field of determination of actinic light intensity in the measurement of chlorophyll fluorescence induction curve, can solve the problems of low degree of decline and unrepresentative test results, etc., and achieve simple implementation, wide application range and operability strong effect
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Embodiment 1
[0058] figure 2 It is the chlorophyll fluorescence induction curve of the pothos radish in one embodiment of the present invention. Take a healthy live pothos (Scindapsus aureun) (Fv / Fm>0.8), clamp the leaves with a dual-channel PAM-100 measuring system DUAL-PAM-100 (Walz, Germany), and cover the whole leaves with a black cloth. Set 10 light intensity gradients from low to high in the instrument software DualPAM v1.9 (9, 89, 127, 211, 342, 522, 696, 861, 1064 and 1323 μmol m -2 the s -1 ), and set the illumination time of each light intensity gradient to 20s, and then measure the fast light curve according to the conventional method. After the measurement, use the equation P=Pm (1-e -α·PAR / Pm ) e -β·PAR / Pm Non-linear fitting is carried out to obtain the half-saturated light intensity Ik = 142μmol m -2 the s -1 . Select the light intensity closest to Ik in the light intensity list, 127 μmol m -2 the s -1 As the actinic light intensity, and then measure the chlorophyll...
Embodiment 2
[0060] image 3 It is the chlorophyll fluorescence induction curve of the sorrel under different actinic light intensities according to one embodiment of the present invention. Take healthy safflower wood sorrel (Oxalis corymbosa DC.) leaves (Fv / Fm>0.8), use the dual-channel PAM-100 measurement system DUAL-PAM-100 (Walz, Germany) to clamp the leaves, and soak the petioles in water. Cover the entire leaf with a black cloth. Set 10 light intensity gradients from low to high in the instrument software DualPAM v1.9 (49, 89, 127, 211, 342, 522, 696, 861, 1064 and 1323 μmol m -2 the s -1 ), and set the illumination time of each light intensity gradient to 20s, and then measure the fast light curve according to the conventional method. After the measurement, use the equation P=Pm (1-e -α·PAR / Pm ) e -β·PAR / Pm Non-linear fitting is carried out to obtain the half-saturated light intensity Ik = 263μmol m -2 the s -1 . Select the light intensity 127 μmol m far below Ik in the light ...
Embodiment 3
[0062] Figure 4 It is the chlorophyll fluorescence induction curve of the camphor tree of one embodiment of the present invention under different actinic light intensities. Take healthy camphor tree (Cinnamomum camphora (L.) Presl.) leaves (Fv / Fm>0.8), clamp the leaves with the leaf clip 2030-B of the portable modulation chlorophyll fluorescence instrument MINI-PAM (Walz, Germany), and soak the petioles in In water, cover the entire leaf with a black cloth. Eight light intensity gradients (116, 207, 312, 427, 620, 816, 1143 and 1504 μmol m -2 the s -1 ), and set the illumination time of each light intensity gradient to 20s, and then measure the fast light curve according to the conventional method. After the measurement, use the equation P=Pm (1-e -α·PAR / Pm ) e -β·PAR / Pm Non-linear fitting is carried out to obtain the half-saturated light intensity Ik = 286μmol m -2 the s -1 . Use the light intensity 312 μmol m closest to Ik in the light intensity list -2 the s -1 T...
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