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Original Article

JVS. 2019; 5(1): 66-75
doi: 23494


Suppression of Cucumber mosaic virus by wind processing and Fusarium equiseti GF19-1

Mohsen Mohamed Elsharkawy,Salem Hamden Homayed,Mohamed Mahmoud Elsawy,Amr Ahmed Khedr.

Abstract
Background
Cucumber mosaic caused by Cucumber mosaic virus (CMV) is a serious threat to crop production all over the world.
Objective
The aim of the current investigation was to evaluate the potential of fan-forced wind and the growth promoting fungus, Fusarium equiseti GF 19-1, as novel and safe management strategies against the invasion of CMV in cucumber plants.
Methods
The fan was operated two times per day (8:00 am and 18:00 pm, each time for 30 min). Moreover, cucumber plants were treated with F. equiseti GF 19-1 or its cell free filtrate (CF) at 1 day before virus inoculation.
Results
The wind velocity (2.8 m/s) resulted in decreased virus severity and titre compared with the control. However, the potential of wind velocity lower or higher than 2.8 was less effective on CMV. Additionally, the severity and titre of CMV were significantly reduced in GF19-1 treated plants in comparison with the control. Quantitative real-time PCR results exhibited increased transcription levels of pathogenesis related genes, chitinase, PAL1 and LOX1.
Conclusion
In cucumber, treatments with artificially generated wind and root colonizing F. equiseti GF19-1 or its CF elicited induced resistance against CMV infection, leading to a restriction of pathogen growth and disease development.

Key words: Cucumber mosaic virus; Induced resistance; Plant growth promoting fungi; Wind processing; Cucumber; qRT-PCR.



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