RESPONSE OF ROOT MESSENGER-RNA POPULATION TO SULFATE SHORTAGE IN MAIZE SEEDLINGS

Roots of ten-days-old seedlings obtained from a maize hybrid grown in complete or in sulphate-deprived medium were used to extract Poly(A)+R NA, The response to sulphate deprivation, which is known to increase t he uptake capacity up to ten times, was manifested also by the express ion of three mRNA species, as shown by the in vitro translation of the mRNA population. One hour after transfer to complete nutrient medium all three mRNAs were still present.