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Antifungal activity and role of Terminalia extracts in imparting resistance in barley against spot blotch by modulating metabolic defense mechanisms
Nitika Khattar1 , Rajni Sharma1 , Amrinder Kaur2 , ROHIT CHHABRA * 3
1- Department of Botany, Punjab Agricultural University, Ludhiana
2- Department of Plant Pathology, Punjab Agricultural University, Ludhiana
3- Department of Botany, Punjab Agricultural University , rohitchhabra325.rr@gmail.com
Abstract:   (276 Views)
The objective of the current investigation was to examine the effects of botanically-induced resistance against the Bipolaris sorokiniana causing spot blotch disease in susceptible barley cultivar (PL 426). Different concentrations of botanical extracts prepared from leaf, fruit and bark of Terminalia bellerica and Terminalia chebula were tested against B. sorokiniana using poisoned food approach. The ethanolic and aqueous fruit extracts resulted in more than 70% mycelial inhibition of B. sorokiniana. The foliar spray of promising doses of botanical extracts was done 2 days prior to inoculation under in-vivo conditions. The physiological and biochemical variations were recorded after treatments from 1 to 7 days after treatment (DAT). Foliar spraying of botanical extracts resulted in an increase in total phenol content in inoculated barley plants from 1 DAT to 7 DAT. The malondialdehyde content was significantly lower in plants treated with botanicals as compared to inoculated and uninoculated controls. The activity of peroxidase and phenylalanine ammonia lyase was significantly higher in all plants sprayed with botanical extracts as compared to controls. Furthermore, botanicals reduced the percentage of disease severity in treated plants while increasing the percentage of yield increase. Plants treated with T. chebula fruit extracts had the highest yield increase, followed by T. bellerica fruit extracts. From the present study, it can be concluded that the fruit extracts of T. chebula and T. bellerica are a promising approach for the eco-friendly management of spot blotch.
 
Keywords: Barley, spot blotch, Bipolaris sorokiniana, extracts, resistance
Full-Text [PDF 792 kb]   (254 Downloads)    
Article Type: Original Research | Subject: Biological control
Received: 2023/01/26 | Accepted: 2024/01/11 | Published: 2024/03/31
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.