Abstract
Mechanisms of solar illumination influence on phytoplankton chlorophyll-a fluorescence and photosynthetic activity were investigated in situ by means of lidar implementation of pump-and-probe technique. It has been found that for subsurface phytoplankton the main mechanisms of sunlight regulation were photoinhibition of primary photosynthesis processes by excessive light, dominating at illuminations more than 40 klx, and 'energy-dependent' fluorescence quenching, affecting at illuminations 5-20 klx. Potential role of another regulating mechanisms (photophosphorylation of pigment-protein complexes, spillover, xanthophyll cycle, lipids and pigments photodestruction) are discussed and analyzed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 421-427 |
| Number of pages | 7 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 1922 |
| DOIs | |
| State | Published - Jun 17 1993 |
| Externally published | Yes |
| Event | Laser Study of Macroscopic Biosystems 1992 - Jyvaskyla, Finland Duration: Sep 7 1992 → Sep 11 1992 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering