Paenibacillus sp. S1S22 Suşu ile Ulva lactuca Ekstresinin Kombine Kullanımının Domates Bitkisinin Büyümesi Üzerine Etkilerinin Belirlenmesi

Abstract

In recent years, plant growth promoting bacteria (PGPB) have been used as biofertilizers that increase agricultural productivity and plant resistance to changing environmental conditions such as drought, salinity and heat stress. One of the proposed new approaches to increase plant productivity, especially under stress conditions, is using algae extracts, naturally occurring bioactive compounds. Paenibacillus sp. S1S22 isolated from sediment was tested for its performance in indole acetic acid production (IAA), nitrogen (N) fixation, phosphate solubilization, proteolytic activity, and cellulose activity. It was also determined antimicrobial activity against different pathogens of this strain. Tomato seeds were incubated with the S1S22 strain, and the S1S22 strain supplemented U. lactuca. It was used as a control group that seeds were incubated with deionized water. We obtained results and demonstrated the addition of Ulva lactuca extract to tomato seedlings incubated with Paenibacillus sp. S1S22 strain increased the root and stem length compared to the control. The results indicate that macroalgae in combination with PGPR may be a much more effective way of promoting plant growth.