Effect of water stress on proline accumulation of genetically modified potatoes (Solanum tuberosum L.) generating fructans.

This study aimed to investigate the effect of water stress on the accumulation of proline in the leaves of transgenic potato lines generating fructans. The results of the series of bifactorial experiments in 2002 and 2003 indicated an increase of the proline level in leaves of all potato lines examined under water deficit. In addition, an increase in proline concentration during plant development was observed.