Potassium monophosphate, potassium diphosphate, potassium permanganate, calcium oxide and potassium phophate buffer (pH 7) as well as acibenzolar-S-methyl for comparison were tested for their capacity to suppress tomato bacterial speck disease caused by Pseudomonas syringae pv. tomato. Basal leaves of tomato plants (cv. PS1296) were sprayed with the above mentioned chemicals and the upper leaves were inoculated with a suspension of the bacterium at 106 cfu ml-1, 3 days after the treatments. Among the chemicals used, potassium phosphate buffer treatment significantly and systemically protected tomato plants from the disease at lesser extent respect to the acibenzolar-S-methyl. The protection was observed with reductions in percentage of leaf surface infected, number of bacterial spots per leaflet, spot diameter and bacterial growth in planta. Further experiments are in progress to establish whether the resistance is mediated by salicylic acid.
Evaluation of some chemicals as inducers of resistance in tomato plants against Pseudomonas syringae pv. tomato.
SILVESTRI, SIMONA;MORETTI, Chiaraluce;FERRANTE, PATRIZIA;BUONAURIO, Roberto
2007
Abstract
Potassium monophosphate, potassium diphosphate, potassium permanganate, calcium oxide and potassium phophate buffer (pH 7) as well as acibenzolar-S-methyl for comparison were tested for their capacity to suppress tomato bacterial speck disease caused by Pseudomonas syringae pv. tomato. Basal leaves of tomato plants (cv. PS1296) were sprayed with the above mentioned chemicals and the upper leaves were inoculated with a suspension of the bacterium at 106 cfu ml-1, 3 days after the treatments. Among the chemicals used, potassium phosphate buffer treatment significantly and systemically protected tomato plants from the disease at lesser extent respect to the acibenzolar-S-methyl. The protection was observed with reductions in percentage of leaf surface infected, number of bacterial spots per leaflet, spot diameter and bacterial growth in planta. Further experiments are in progress to establish whether the resistance is mediated by salicylic acid.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
