Ecophysiological aspects of biomass production in higher plants

Abstract

Photosynthesis as a cosmic process of local entropy decrease is the basic phenomenon for life on Earth. Biomass production is energetically understood as a long-term storage of hydrogen. Endogeneously, the hierarchy of energy storage begins with the electric and proton gradient across the thylakoid membrane. At all higher levels of energy-converting system, efficiency is determined by the interactions between the autotrophic and heterotrophic part of the studied biosystem. Specially, the regulatory function of anabolic and catabolic reduction charge is discussed. From the frame of exogeneous factors, the action of calcium in connection with calmodulin is described as a second messenger.Summarizing, the findings are integrated into the energy-overflow concept in which the loss terms act as system stabilizers especially under injuring conditions.

Biomass production of 17 poplar clones in a short-rotation coppice culture on a waste disposal site and its relation to soil characteristics

“…In wet and low oxygenic soils, a high manganese content may result in toxicity effects, because of oxidation and reduction reactions in the soil. Hoffmann (1985) showed the long-lasting effect of permanent or stagnant water to be the main factor influencing growth of poplar, depending on clone. In other studies, soil bases calcium and magnesium, and the nutrients nitrogen and phosphorus showed to be the most limiting for plant growth (Gilmore, 1976;Bowersox and Ward, 1977).…”

The Dilemma of Plants: To Grow or Defend

“…Under growth-limiting conditions, end-product accumulation can result in feedback inhibition of photosynthesis (Neales and Incoll, 1968;Foyer, 1987Foyer, , 1988Korner , 1991;Lux more, 1991). Photosynthates, however, may be shunted into secondary metabolic pathways minimizing the accumulation of photosynthetic end products at their site of synthesis, possibly resulting in increased carbon accumulation ( overflow metabolism) (Hoffmann, 1985;Haslam, 1986;Moleetal., 1988;Waterman and Mole, 1989).…”