Effect of solubilizing phosphate bacteria Pseudomonas putida on salt tolerance of two sunflower cultivars

Subject Areas : Journal of Plant Ecophysiology

M.  Yosefirad ¹ (گروه زراعت ، دانشکده کشاورزی، واحد ساوه، دانشگاه آزاد اسلامی، ساوه، ایران)
F.  Moghimi ² (گروه زراعت ، دانشکده کشاورزی، واحد ساوه، دانشگاه آزاد اسلامی، ساوه، ایران)

Received: 2014-12-08 Accepted : 2015-02-26 Published : 2016-09-01

Keywords: bacteria inoculation, Tolerance index, Yield and yield component of sunflower, Phosphate concentration,

Abstract :

This study aimed to investigate the effect of solubilizing phosphate bacteria Pseudomonas putida on salt tolerance of two sunflower cultivars in crop year 2010 in greenhouse of Islamic Azad University, was performed. The experiment was done as factorial based on randomized complete block design in three replications. First factor consist of non inoculation and inoculation of sunflower seeds with Pseudomonas putida, and second factor consist of two sunflower cultivars of Alstar and Progress and third factor was three levels of salinity control (0.6), 5 and 7 ds/m. Salinity decreased shoot dry weight, plant height, leaf number in plant, seed number per head, seed hundred weight, seed yield and phosphate content and concentration in studied varieties. All studied traits in inoculated plants with bacteria, in both conditions of stress salinity and non-stress were larger than non inoculated plants. Alstar cultivar was more salinity tolerant than to progress cultivar, but Progress to bacterial inoculation showed a better response in salinity condition. The research results showed that inoculated plants with bacteria had salt tolerance greater than non inoculated plants. Thus it can be stated that Pseudomonas putida increased salinity tolerance of sunflower in salinity stress condition.