Ramez M. Al Shami^*(1) Imad D. Ismail⁽¹⁾ and Yaser Hammad⁽²⁾

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

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

(*Corresponding author: Eng. Ramez M. Al Shami. E-Mail: ramezalshami924@gemail.com).

Received: 30/06/2017                              Accepted: 03/10/2017

Abstract

This experiment aimed to study the effect of three species of plant growth promoting rhizobacteria (Frateuria aurantia, Bacillus megaterium and Azotobacter chroococcum) by inoculated seeds or seedlings of tomato plants on suppressed the effect of Cucumber mosaic virus (CMV) in greenhouse in Tartus. Total phenols and photosynthesis pigments (chlorophyll A, B and carotenoids) were observed in fresh leaves of tomato plant after 30 Days of infection. Results showed, that treatment with single bacteria Frateuria aurantiawas was significantly higher in total phenol compared  with Bacillus megateriumor, Azotobacter chroococcum, compared with the control healthy or infected. However, the bacteria Azotobacter chroococcum gave a significant increase in photosynthesis pigments compared with Bacillus megaterium or Frateuria aurantia. On the other hand, the mixed treatment of ABF+CMV (seeds and seedlings) showed highest increase in total phenol (37.75 and 47.09 mg/100g) consequently, photosynthesis pigments (chlorophyll A 0.973 and 1.065 mg/g), (chlorophyll B 0.872 and 0.903mg/g) and (carotenoids 0.972 and 0.995 mg/g) respectively. The increase in total phenols and photosynthesis pigments leads to the ability ofrhizobacterto stimulate systemic resistance and reduce the effect of the virus on tomato plants.

Keywords: CMV, PGPR, Tomato, Total phenols, Photosynthesis pigments.

Full paper in Arabic: PDF