Photoacoustic Action Spectra of Bundle-Sheath Cells of Zea Mays

Popovic, Radovan; Leblanc, Roger M.; Beauregard, Marc

doi:10.1007/978-94-009-3535-8_148

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…The composition of pigments in vivo has been measured by taking pa spectra from leaves (Buschmann & Prehn 1981Veeranjaneyulu & Das 1982;Nagel & Lichtenthaler 1988), fruits , flower petals (Li et al 1983), isolated cells (Carpentier & Matijs 1986;Beauregard et al 1987;Popovic et al 1987), chloroplasts , immobilized membranes (Thomasset et al 1982) and pigment complexes (Dienstbier et al 1984;Frackowiak et al 198s). Figure 7 gives an example of a pa spectrum of an intact radish cotyledon.…”

Section: (I) Pigment Compositionmentioning

confidence: 99%

“…A specific spectral decrease of heat dissipation measured with isolated photosystem II particles, in which the electron flow was suppressed or activated by the addition of an electron acceptor and electron donor, led to the assumption that pheophytin might be involved in an energy storage process (Fragata 1987). Specific reactions of photosynthetic electron flow were investigated by measuring photoacoustic spectra of isolated bundle-sheath cells of maize after addition of different reaction agents (Popovic et al 1987).…”

Section: (Iv) Pigment Activitymentioning

confidence: 99%

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Photoacoustic measurements: application in plant science

Buschmann

1989

Phil. Trans. R. Soc. Lond. B

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By means of the photoacoustic effect light-induced heat can be detected, which is produced during non-radiative de-excitation following absorption of light. This paper gives an overview of the current knowledge of photoacoustic measurements. First, the principle of detection and the different instrumentations are outlined in general. Then the applications of photoacoustic measurements in plant science and in particular in photosynthesis research are described in detail, ( a ) The induction kinetics of intact leaves at high modulation frequencies (where the signal is only determined by heat production) are contrasted with those at low modulation frequencies (where the signal can be determined by photosynthetic oxygen evolution superimposed on the heat production). Examples for ( b ) the determination of time constants and for ( c ) the measurement of the time delay between the excitation and the detection of the signal (phase) are given. Finally, ( d ) photoacoustic spectra are described. These can be used to determine the pigment composition, the depth profile, the efficiency of energy transfer and the pigment activity of a sample.

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