Enhancement of disease resistance, growth potential, and photosynthesis in tomato (Solanum lycopersicum) by inoculation with an endophytic actinobacterium, Streptomyces thermocarboxydus strain BPSAC147

Ajit Kumar Passari, Kalidas Upadhyaya, Garima Singh, Ahmed M. Abdel-Azeem, Sugitha Thankappan, Sivakumar Uthandi, Abeer Hashem, Elsayed Fathi Abd-Allah, Jahangir Ahmed Malik, Alqarawi As, Vijai Kumar Gupta, Sanjay Ranjan, Bhim Pratap Singh*

*Corresponding author for this work

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Abstract

Biotic stresses in plants have a significant impact on agricultural productivity. In the present study, in vivo experiments were conducted to determine the physiological responses of tomato (Solanum lycopersicum L.) seedlings by inoculation with an endophytic actinobacterium, Streptomyces thermocarboxydus isolate BPSAC147 under greenhouse conditions. Further, photochemical quantum yield of photosystem II (PSII) (Fv/Fm), photochemical quenching (qP) and non-photochemical (NPQ) were calculated in seedlings inoculated with S. thermocarboxydus (T1) and were compared with control (T0) plants. Furthermore, the electron transport rate (ETR) of PSII exhibited a significant increase in T1 plants, relative to T0 plants. These results indicate that inoculation of tomato seedlings with S. thermocarboxydus had a positive effect on the process of photosynthesis, resulting in enhanced chlorophyll fluorescence parameters due to increased ETR in the thylakoid membrane. GC-MS analysis showed significant differences in the volatile compounds in the different treatments performed under greenhouse conditions. The present study suggests that S. thermocarboxydus can be used as new biocontrol agent to control Fusarium wilt in tomato crops and enhance productivity by enhancing photosynthesis.

Original languageEnglish
Article numbere0219014
JournalPLoS ONE
Volume14
Issue number7
Early online date3 Jul 2019
DOIs
Publication statusFirst published - 3 Jul 2019
Externally publishedYes

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    Passari, A. K., Upadhyaya, K., Singh, G., Abdel-Azeem, A. M., Thankappan, S., Uthandi, S., Hashem, A., Abd-Allah, E. F., Malik, J. A., As, A., Gupta, V. K., Ranjan, S., & Singh, B. P. (2019). Enhancement of disease resistance, growth potential, and photosynthesis in tomato (Solanum lycopersicum) by inoculation with an endophytic actinobacterium, Streptomyces thermocarboxydus strain BPSAC147. PLoS ONE, 14(7), [e0219014]. https://doi.org/10.1371/journal.pone.0219014