BURKHOLDERIA SP. KCTC 11096BP MODULATES PEPPER GROWTH AND RESISTANCE AGAINST PHYTOPHTHORA CAPSICI

 

SANG-MO KANG¹, MUHAMMAD HAMAYUN², MUHAMMAD WAQAS^1,2, JIN-HO KIM⁴,

ZABTA KHAN SHINWARI⁵ AND IN-JUNG LEE^1*

 

¹School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University,

Daegu 702-701, South Korea

²Department of Botany, Abdul Wali Khan University Mardan, Pakistan

³Department of Agriculture, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan

⁴Division of Ecology and Environmental System, Kyungpook National University, Sangju 741-711, South Korea

⁵Department of Biotechnology, Quaid-i-Azam University Islamabad, Pakistan

*Corresponding author’s email: ijlee@knu.ac.kr; Tel: + 82-53-950-5708 (Office), Fax: + 82-53-958-6880

 

Abstract

 

Biological control of crop diseases is desirable for sustainable agriculture as it minimizes chemical inputs in the agricultural system and promotes eco-friendly environment. We analyzed the favorable role of Burkholderia sp. KCTC 11096BP against the pathogen Phytophthora capsici in pepper. We screen thirty rhizobateria for their anti-pathogen activity, and found that Burkholderia sp. KCTC 11096BP exhibits maximum growth inhibition of the pathogen P. capsici. The bacterium inoculation to pepper plants significantly enhanced growth attributes of pepper in infected and control treatments. The total proteins (10.9%), and the amino acids viz. glycine (4.08 ug/g), leucine (3.3 ug/g), and alanine (3.26 ug/g) were preset in considerably higher quantities in Burkholderia sp. applied treatments as compare to control. The systemic acquired resistance (SAR) of the host plant was up-regulated by Burkholderia sp. KCTC, as endogenous salicylic acid (235.5 ng/g) and jasmonic acid (22.8 ng/g) levels were found higher in such treatments. It was concluded that Burkholderia sp. KCTC 11096BP mitigates the adverse effects of P. capsici on pepper crop and can improve crop productivity at the field level.

 

Key words: Burkholderia sp. KCTC 11096BP, Phytophthora capsici, Pepper, Plant protection.