Hanan Kawas *(1) Omar Hamudi(2) Ahmad Ahmad(3) Imad Ismail(4)
(1). Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria.
(2). Agricultural Research Center of Latakia, General Commission for Scientific Agriculture Research (GCSAR), Damascus, Syria.
(3). Agricultural Research Center of Tartous, (GCSAR), Damascus, Syria.
(4). Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria.
(*Corresponding author: Eng. Hanan Kawas. E-Mail: hanankawas1@gmail.com).
Received: 18/12/2016 Accepted: 14/02/2017
Abstract
This research was conducted to study the effect of four bacterial strains (PGPR): Pseudomonas chlororaphis MA342, Serratia plymuthica HRO-C48, Bacillussubtillis B2g and B. subtillis FZB27 to improve the growth of tomato plants in the greenhouse. Bacterial strains were applied to the seeds in a concentration of (1010 cfu/ml), of each bacterial strain. The results showed the treatment with bacteria improved peroxidase enzyme activity at a rate of (2.15-6.35) % after 78 days of treatment compared with non-treated control (0.002) n mol, and a rate of (60.71- 232.14) % after 94 days compared with non-treated control (0.056) n mol. The treatment with bacteria increased the height of plant at a rate of (1-21.37)% compared with non-treated control (57.83) cm, and increased fresh weight of foliage at a rate of (9.25-122.56)% compared with non-treated control (317)g, while it increased dry weight of foliage at a rate of (3.89- 61.98)% compared with non-treated control (111.33)g, and increased fresh root weight at a rate of (22.39-310.48)% compared with non-treated control (22.33)g, and increased root dry weight at a rate of (9.09- 33.27)% compared with non-treated control (5.5)g, and increased number of fruits at a rate of (7.73-54.73)% compared with non-treated control (8.66 fruit), and increased weight of fruits at a rate of (5.69-60.33)% compared with non-treated control (105.33)g . The strain B27 had the highest values of the studied traits.
Key words: PGPR, Pseudomonas chlororaphis MA342, Serratia plymuthica HRO-C48, Bacillus subtillis B2g, B. subtillis FZB27, Tomato.
Full paper in Arabic: PDF