The effects of water stress induced by poly ethylene glycol-6000 (PEG6000) on the growth of bunching onion (Allium fistulosum L.var.caespitosum Makino) were studied.The results showed that the growth of bunching onion was significantly affected by water stress induced by PEG.Plant height,Pseudo-stem diameter, Pseudo-stem weight,total plant weight decreased with the increase of PEG concentrations,the inhibitions of 10% PEG and 20% PEG were greater than those of 15% PEG.Bound water concentration,nature water ...