Mohammad S .Ibrahim^(1)*  ,Yaser A. Hammad ⁽¹⁾ and  Salim Raahe⁽²⁾

(1). Soil and Water Department, Faculty of Agriculture, Tishreen University, Latakia, Syria.

(2). Plant Protection Department, Faculty of Agriculture, Tishreen University, Latakia, Syria

 (*Corresponding author: Mohammad. S. Ibrahim. E-Mail: mohammad.ibrahim@tishreen.edu.sy).

Received: 24/07/2019                               Accepted: 25/08/2019

Abstract

This study is aimed to study the effect of using four species of bacteria (PGPR) Azotobacter chroococcum, Rhizobium leguminosarum, Bacillus megaterium and Frateuria aurantia on growth, and reducing the effect of Cucumber mosaic virus (CMV) on pepper plants in a greenhouse experiment. The observed growth parameters were: (surface leaf area, its index, concentration of vitamin C, and concentration of salicylic acid) in a greenhouse expirment in Tartous in the season 2016/2017. The results revealed that the inoculation single or mixed led to significant increasing in the whole treatments compared with the non-inoculated healthy control, and the effect of CMV in the inoculated plants was reduced and increasing in growth parameters compared with the non-inoculated healthy control. However, the single inoculation with Frateuria aurantia gave the best significant increasing compared with the other strains Bacillus megaterium, Rhizobium leguminosarum and Azotobacter chroococcum and the treatment of the four bacterial species was the best and with significant differences The surface leaf area was 9843 cm²/ plant, and its index was 1.96 m²/m². The concentration of vitamin C in the peppers was 228 mg /100 g. The concentration of salicylic acid in the leaves of the peppers was 82.87 μg / g fresh.

Keyword: PGPR, CMV, Pepper, Inoculation.

Full paper in Arabic: PDF