بررسی تاثیر جدایه‌های قارچ تریکودرما Trichoderma spp. و باکتری Bacillus subtilis در فاکتورهای رشدی گیاه گوجه‌فرنگی در شرایط گلخانه

The effect of microorganisms on plant growth has been seen in the cultivation of many products. Different fungi and bacteria are known to play multiple roles in nature, such as plant endophytes, plant disease antagonists, rhizosphere colonizers, and plant growth promoters. In this research, the effect of Trichoderma spp., Bacillus subtilis, salicylic acid and humic acid were investigated in increasing tomato growth in greenhouse conditions. Fungus isolates belong to T. harzianum and T. longibrachiatum including one commercial strain (Trichorun) and three indigenous strains, bacterial isolates belong to B. subtilis including one commercial strain (Serenade) and five indigenous strains, salicylic acid and humic acid, in two forms foliar spraying of aerial parts and root inoculation was done in the form of a completely random design in five repetitions. The treatments were used individually and in combination. Stem diameter, root volume, root and aerial parts fresh and dry weight were used as growth indicators in this test. The results of the experiments showed that the combined treatment of the Trichorun with Serenade and the indigenous treatment of T. harzianum 2, all of which were used as root inoculation, caused a significant increase in stem diameter of 22.49 and 23.02 %, 61.68 and 67.28 % of root volume, 74.37 and 61.17 % of root fresh weight, 48.82 and 40.51 % of root dry weight, 24.08 and 33.26 % of aerial parts fresh weight, and 39.73 and 31.15 % of aerial parts dry weight of tomato respectively compared to control. The lowest yield was related to the control. The use of these antagonistic agents in the root of the plant can, in addition to controlling pathogenic agents, improve growth, increase productivity and make the plant resistant to pests and diseases.