Sulphur supply to peas (Pisum sativum L.) influences symbiotic N2 fixation
H.W. Scherer, S. Pacyna, N. Manthey, M. Schulzhttps://doi.org/10.17221/3348-PSECitation:Scherer H.W., Pacyna S., Manthey N., Schulz M. (2006): Sulphur supply to peas (Pisum sativum L.) influences symbiotic N2 fixation. Plant Soil Environ., 52: 72-77.
In a pot experiment (culture substrate: perlite with a granulometric composition 0–3 mm) with peas (Pisum sativum L.) we studied the influence of sulphur supply on S and N concentrations, yield formation, symbiotic N2 fixation and available amounts of glucose and sucrose. Under S deficiency conditions S and N concentrations as well as the amounts of glucose and sucrose in shoots and nodules were significantly reduced. We assume that the reduced amounts of available photosynthate with suboptimal S supply could become limiting to energy production and as carbon skeletons for ammonia assimilation, and therefore cause a lower N2 fixation and a reduced yield formation.Keywords:
peas; sulphur supply; carbohydrates; symbiotic N2 fixation