Differential methods of inoculation of plant growth-promoting rhizobacteria induce synthesis of phenylalanine ammonia-lyase and phenolic compounds differentially in chickpea.
Foliar spray and micro-injection of plant growth-promoting rhizobacterial species, viz. Pseudomonas fluorescens and P. aeruginosa on chickpea induced synthesis of phenylalanine ammonia-lyase (PAL) when tested against Sclerotinia sclerotiorum. Induction of PAL was also associated with increased synthesis of phenolic compounds such as tannic, gallic, caffeic, chlorogenic and cinnamic acids. Treatment with P. fluorescens was found to be more effective in inducing phenolic compounds as compared to P. aeruginosa. However, persistence of PAL activity was observed more with P. aeruginosa. Although both the inoculation methods were effective, foliar application was found to be superior to micro-injection in terms of rapid PAL activity leading to the synthesis of phenolic compounds.
Basha
S A
SA
Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, India.
Sarma
B K
BK
Singh
D P
DP
Annapurna
K
K
Singh
U P
UP
D000898:Antibiosis; D001203:Ascomycota / Q000472:pathogenicity*; D002109:Caffeic Acids / Q000378:metabolism; D002726:Chlorogenic Acid / Q000378:metabolism; D029863:Cicer / Q000378:metabolism / Q000382:microbiology*; D002934:Cinnamates / Q000378:metabolism; D005707:Gallic Acid / Q000378:metabolism; D010572:Pest Control, Biological / Q000379:methods; D010650:Phenylalanine Ammonia-Lyase / Q000378:metabolism*; D010935:Plant Diseases / Q000382:microbiology; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology; D011550:Pseudomonas aeruginosa / Q000254:growth & development / Q000378:metabolism*; D011551:Pseudomonas fluorescens / Q000254:growth & development / Q000378:metabolism*; D013634:Tannins / Q000378:metabolism
D002109:Caffeic Acids; D002934:Cinnamates; D013634:Tannins; C029010:cinnamic acid; D002726:Chlorogenic Acid; D005707:Gallic Acid; D010650:Phenylalanine Ammonia-Lyase; C040048:caffeic acid