The effect of temperature on growth and development of cultivars of radish under winter conditions

Leaf and root growth and development of 7 early radish cultivars and strains were studied at a series of constant temperatures varying from 10°C to 26°C under winter conditions. Maximum leaf growth was observed at 23°C, maximum root growth initially at 14°C and later on at 10°C. Total dry matter production was highest at 23°C. Between the cultivars/strains distinct differences in rate of leaf and root growth were noted, but no clear interactions of temperature X cultivar/strain were found. The prospects of shortening the growing-period in winter of early radish by means of regulating environmental factors and plant breeding are discussed.