La iPAR afectó la dinámica de llenado y de acumulación relativa de aceite en frutos de girasol del híbrido DKG-100.

DOSIO, G.A.A.; IZQUIERDO N.G.; AGUIRREZÁBAL, L.A.N.

Revista Facultad de Agronomía UBA

Universidad de Buenos Aires

Lugar: Buenos Aires; Año: 1997 vol. 17 p. 117 - 122

0325-9250

The objective of this study was determinate if the effect of variations in cumulative intercepted photosinthetically active radiation (iPARc), during grain filling period, on individual dry weight and relative oil content of one sunflower hibryd, is due to changes in duration and/or growth rate in linear fase of the growing curve. After end of fecundation four treatments were made to variate iPARc (72, 100, 133 and 256 % of the control). Fruit dry weight and oil relative content curves were made for all treatments. Temperature was measure in sunflower heads of all treatments. Variations of iPARc affected oil relative content in the way of changes in linear phase duration of the curve. Individual dry weight growth rate was only lower in 72 % iPARc treatment, while duration were only different for 256 % treatment. Temperature could not permite explain the effects on the studied acumulation dynamics.