Effects of Fluorescent Pseudomonads with ACC Deaminase Activity on Growth Characteristics of Canola (Brassica napus L.) under Salinity Condition

Salinity stress is of great importance due to reducing crop yield in arid and semiarid areas of the world. This research was conducted to evaluate of fluorescent pseudomonads with ACC deaminase activity on growth characteristics of canola (Brassica napus L.) under salinity conditions. The experiment was conducted by factorial experiments on the basis of completly randomized design with four replicationas and under controlled conditions in a green house. The bacterial species included P. p11، P. p. 108، P. f. 169 and P. f. 196 and the control; the salinity levels were 0. 335 (control)، 5، 10، and 15 dS/m created by diluting a highly natural saline water by various degrees. According to the results inoculation with the selected species was effective on alleviating the unfavorable effects of salinity on canola growth during the vegetative and reproductive growth stages. Increase in salinity reduced plant height، leaf area index، fresh and dry weight، relative water content، leaf water potential، fertile ears، biological and grain yield. It، however، increased stomatal resistance. The mean comparisons indicated that at each level of salinity inoculation with the selected bacteria decreased the negative effects of salinity on the examined parameters.