Die Bedeutung des Wechselspiels von Photosynthese, Blattpopulation und Pflanzlicher Architektur für Wachstum und Konkurrenzkraft

Abstract

Significance of interactions between leaf photosynthesis, leaf populations, and plant architecture for growth and competitive ability. — Shifts in assimilate partitioning may enhance or compensate for changes in leaf photosynthesis, since the efficiency of assimilate use in particular architectures and/or in leaf population growth may be more important for plant growth than photosynthetic activity per leaf. This is shown (1) comparing seasonal photosynthetic capacity with actual daily carbon balances over the season in Eucalyptus pauciflora Sieb. ex Spreng., (2) in growth experiments with Raphanus spec, applying SO2 fumigation and different combinations of N-nutrition, light and photoperiod, and (3) for representative woody species of a secondary forest succession in Central Europe. A conceptional model to predicting and explaining processes on higher levels of integration from lower levels is discussed.