Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810023166
Authors: PRITI SUBHASHRAO SABNIS
Advisor: MAHADEV SWAMY
Title: STUDIES ON PLANT GROWTH PROMOTING RHIZOBACTERIA (PGPR) ASSOCIATED WITH CHILLI (Capsicum annuum L.) GROWN IN TUBABHADRA PROJECT (TBP) COMMAND AREA OF KARNATAKA
Language: en
Type: Thesis
Agrotags: null
Abstract: Use of plant growth promoting rhizobacteria (PGPR) for the benefit of agriculture is gaining worldwide importance and acceptance and appears to be the trend for the future. PGPR are bioresources which may be viewed as a novel and potential tool for increase the plant growth via direct or indirect mechanisms. Considering their importance a totally 40 Pseudomonas and 40 Azospirillum strains of PGPR isolated from chilli rhizosphere and rhizoplane grown in TBP area of Karnataka. On the basis of morphological, physiological and biochemical characteristic, 28 isolate belonging to P. fluorescence genus and 22 isolates belonging to the genus A. lipoferum . Out of 40 isolates of Pseudomonas 30 isolates capable of producing siderophore, 32 isolate were positive for IAA production and 17 isolate able to solubilize the phosphorus. 21 strains of P. fluorescence significantly inhibited the mycellial growth of F. Oxysporum. The per cent of inhibition ranges between 2.22% to 25.66%.Among all the isolate PS-5 strain isolated from manvi taluq of raichur district were showed maximum inhibition of F. Oxysporum with highest 25.66 inhibition per cent .The amount of nitrogen fixed and IAA production by Azospirillum isolates ranged from 3.99 mg of N/g to 19.92 mg of N/g of malate source utilized and IAA ranges from 7.63 to 35.73 μg/50 ml of medium. The Azospirillum isolate AZP-26 belong to Yerdhal place of TBP area able to produce maximum IAA production as well as maximum nitrogen fixing capacity compare to control and reference strain of Azospirillum under in vitro conditions i.e.,35.73 μg/50 ml of medium and 19.92 mg of N/g of malate , respectively. These beneficial and free living bacteria enhance emergence, colonize roots, stimulate the growth and increase the yield of plant. Thus Pseudomonas and Azospirillum are the potential PGPR for providing substantial benefits to the Agriculture.
Subject: Agricultural Microbiology
Theme: STUDIES ON PLANT GROWTH PROMOTING RHIZOBACTERIA (PGPR) ASSOCIATED WITH CHILLI (Capsicum annuum L.) GROWN IN TUBABHADRA PROJECT (TBP) COMMAND AREA OF KARNATAKA
These Type: M.Sc
Issue Date: 2012-06-30
Appears in Collections:Thesis

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