Effect of Iron Availability on Induction of Systemic Resistance to Fusarium Wilt of Chickpea by Pseudomonas spp..
10.4489/MYCO.2005.33.1.035
- Author:
Ratul SAIKIA
1
;
Alok K SRIVASTAVA
;
Kiran SINGH
;
Dilip K ARORA
;
Min Woong LEE
Author Information
1. National Bureau of Agriculturally Important Microorganisms (NBAIM), Kushmaur, Mau - 275101, UP, India. aroradilip@yahoo.co.in
- Publication Type:Original Article
- Keywords:
Fusarium oxysporum f. sp. ciceri;
Fusarium wilt;
Pseudobactin;
Pseudomonas spp.;
Salicylic acid
- MeSH:
Biological Assay;
Chromatography, Liquid;
Cicer*;
Colon;
Fusarium*;
Iron*;
Plants;
Pseudomonas fluorescens;
Pseudomonas*;
Salicylic Acid;
Wool
- From:Mycobiology
2005;33(1):35-40
- CountryRepublic of Korea
- Language:English
-
Abstract:
Selected isolates of Pseudomonas fluorescens (Pf4-92 and PfRsC5) and P. aeruginosa (PaRsG18 and PaRsG27) were examined for growth promotion and induced systemic resistance against Fusarium wilt of chickpea. Significant increase in plant height was observed in Pseudomonas treated plants. However, plant growth was inhibited when isolates of Pseudomonas were used in combination with Fusarium oxysporum f. sp. ciceri (FocRs1). It was also observed that the Pseudomonas spp. was colonized in root of chickpea and significantly suppressed the disease in greenhouse condition. Rock wool bioassay technique was used to study the effect of iron availability on the induction of systemic resistance to Fusarium wilt of chickpea mediated by the Pseudomonas spp. All the isolates of Pseudomonas spp. showed greater disease control in the induced systemic resistance (ISR) bioassay when iron availability in the nutrient solution was low. High performance liquid chromatography (HPLC) analysis indicated that all the bacterial isolates produced more salicylic acid (SA) at low iron (10microM EDDHA) than high iron availability (10microFe3+ EDDHA). Except PaRsG27, all the three isolates produced more pseudobactin at low iron than high iron availability.
