deprived of nitrogen (N), phosphorous (P) and potassium (K) were treated with either a 0.4% Kelpak® solution or a 10−4M PA solution (a combination of putrescine
deprived of nitrogen (N), phosphorous (P) and potassium (K) were treated witheither a 0.4% Kelpak® solution or a 10−4M PA solution (a combination of putrescine