THE CONTROL OF TUBER FORMATION IN SOLANUM-ANDIGENUM CONVAR. ZHUKOVSKII

The effects of chlorocholine chloride (CCC) and short days (SD) on CO2 exchange in leaves, the partition of C-14-assimilates, and biomass ac cumulation in tubers of potato species Solanum andigenum convar. zhuko vskii Lechn., which forms tubers only under SD conditions, were studie d. CCC and SD improved biomass accumulation and increased starch conte nt in tubers at the expense of reduced deposits of current photosyntha tes in stems. The conclusion was reached that CCC and SD exerted simil ar action due to their influence on the balance of the endogenous horm ones involved in the control of tuber formation and growth.