Das Kompensationsvermögen der Weizenähre in Abhängigkeit vom Temperaturniveau während der Kornausbildungsperiode

Compensation capacity of wheat ears depending on temperature level during grain-filling period
In order to investigate the compensation capacity, effects of sterilization treatments on dry matter storage within spikelets and florets of wheat ears, growing in different temperatures during grain-filling period were tested. Alternatively proximal or distal florets from 6 spikelets in the central region were removed at different stages. — Grain weight/ear remained 40% smaller in the high compared with the low temperature level. With high temperature sterilization of proximal florets allowed more additional florets in distal positions to develop grains than with low temperature. Beyond of this in both levels single grain weights in the basal and the apical region of the ear increased. Compensation effects, especially by additional grains decreased as later the treatments were done. Relatively the grain weight loss by sterilization was compensated to a higher degree in high than in low temperatures.