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Google Scholar Butler, W. The methodology has been described and protocols given for measurements of both reaction centers and whole cells Boichenko et al. Google Scholar Leigh, J.
It was also reported that in laboratory experiments, nutrient limitation lowers quantum yields Cleveland et al. Google Scholar Pellin, M. Google Scholar Netzel, T. In such cases, the denominator used is the total light energy impinging on the area studied. A rapid decrease in the very first minutes of exposure was followed by a slower decline over the next few hours, probably due to harm to different components of the photosynthetic apparatus Fig. Google Scholar Kononenko, A.
Linear regression of the quantum yield vs. Figure 8. Importance 5. This ecological efficiency parameter is always considerably smaller than the quantum yield, since usually all of the solar energy is absorbed by phototrophs, except in dense plant cover or hypertrophic water bodies. Google Scholar Parson, W. Google Scholar Pellegrino, F.
Singer, ed. Google Scholar Mathis, P. Google Scholar Paschenko, V. We thank Sharon Victor for editorial assistance. In our efforts to comprehend nature and to gain insights into mechanisms of fundamental biological processes, the great advantages offered by laser equipment have been clearly demonstrated by striking progress in photosynthetic research. The effect of nutrient limitation on the relative photosynthetic energy storage in the three algae, Nannochloropsis sp.
It was also reported that in laboratory experiments, nutrient limitation lowers quantum yields Cleveland et al. If a change is seen then, energy utilization has changed and the xanthophyll cycle will be implicated.
Alterations in the photoinduced absorption changes after treatment of isolated chloroplasts with large pulses of the ruby laser, Arch. Stable isotopes The main drawback of the above methods is their inability to measure the rate of respiratory O2 uptake in the light, and it is assumed that the rates of dark and light uptakes are equal. Paris D: — Photoacoustics Energetics of photosynthesis determined by pulsed photoacoustics.