Limitation of Photosynthesis by Carbon Metabolism

The effects of phosphorus limitation on carbon metabolism in diatoms

Phosphorus is an essential element for life, serving as an integral component of nucleic acids, lipids and a diverse range of other metabolites. Concentrations of bioavailable phosphorus are low in many aquatic environments. Microalgae, including diatoms, apply physiological and molecular strategies such as phosphorus scavenging or recycling as well as adjusting cell growth in order to adapt to...

2. Photosynthesis: the Light Reaction and Carbon Metabolism

Photosynthesis and Carbon Balance

The requirements for modelling photosynthesis and related processes within the framework of a Functional-Structural Plant Model (FSPM; cf. Vos et al. this volume) are discussed. A combined local gas (carbon dioxide, water vapour) and radiant energy exchange model (GREM) is presented, that was specified to be embedded into an FSPM. The model accounts for the effect of organ nitrogen content (N) ...

Preparation of radioactive carbon-labeled sugars by photosynthesis.

Carbohydrates, glucose, fructose, sucrose, and starch, labeled in all carbon positions with C14, are useful for the study of intermediate metabolism in living organisms and for many other purposes. Two papers dealing with the synthesis of labeled carbohydrates have already appeared (1, 2), but no detailed methods of preparing the above carbohydrates are available. It is the purpose of this pape...

Effect of iron limitation on photosynthesis in a marine diatom

The response of the marine diatom Phaeodactylum ,tricornutum to Fe deficiency was evaluated in the context of fundamental physiological models of growth and photosynthesis. Fe deficiency induced chlorosis, which decreased Chl a : C ratios and Chl a-specific light-saturated photosynthesis (P,“). In contrast to Pme, (Ye was slightly increased under Fe deficiency, and photosynthesis in Fedeficient...