Molecular Imaging for Plant Physiology(3): Parametric Images of Photosynthesis against Temperature Conditions

Abstract

The Positron Emitting Tracer Imaging System (PETIS) and caron-11-labeled carbon dioxide (¹¹CO₂) can image carbon kinetics and parametric images of photosynthesis. With an exposure ¹¹CO₂ -gas to a leaf, PETIS experiments were performed against several temperature conditions in one individual plant. In order to make photosynthetic parametric images quantitatively, all time activity curves each pixels were fitted to a tracer kinetic model, the photosynthetic compartment model. These results are reasonable response against temperature conditions, and important to discuss photosynthesis in plant physiology and agriculture. Kinetic parameters are fitted enough with pixel-by-pixel analysis, so that our method suggest that a parametric imaging of photosynthesis, which is indicative of a plant molecular imaging.