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Biopriming of microprapagated banana plants at pre- or post-BBTV inoculation stage with rhizosphere and endophytic bacteria determines their ability to induce systemic resistance against BBTV in cultivar Grand Naine, Biocontrol Science and Technology

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Title Biopriming of microprapagated banana plants at pre- or post-BBTV inoculation stage with rhizosphere and endophytic bacteria determines their ability to induce systemic resistance against BBTV in cultivar Grand Naine, Biocontrol Science and Technology
 
Creator R. Manohar Jebakumar and R. Selvarajan.
 
Subject Endophytes; bioformulations; biocontrol; banana bunchy top virus; management
 
Description Not Available
Rhizospheric and endophytic bacteria isolated from the roots and
corms of banana were tested to find out their efficiency in
controlling against banana bunchy top virus (BBTV). Bioformulations
of mixtures of endophytic Bacillus pumilus and B. subtilis isolated
from banana cv. Grand Naine and rhizobacterial isolate
Pseudomonas fluorescens (Pf1) were found to be effective in
increasing the growth and physiological parameters such as
pseudostem girth and height, number of leaves, phyllochron, and
leaf area in biohardened plants under greenhouse study. The
consortia of bioformulation mixture of B. pumilus, B. subtilis, and
P. fluorescens I showed 61.62% disease reduction over control. The
defence enzymes such as peroxidase (POX), polyphenol oxidase
(PPO), phenylalanine ammonia lyase (PAL), and total phenol were
induced to an elevated level in biohardened plants. The applications
of bioformulations to plants led to delay the symptom expression
for 63.75 to 70.50 days compared to control after challenge
inoculation with the virus in 34–67% of plants that exhibited the
symptoms till 150 DAI. However, biohardening of plants with the
same combinations of bacteria three days after BBTV inoculation led
to express the symptoms 29.16 to 36.71 days and there was a
significant decrease in plant growth parameters. Biopriming prior to
BBTV infection has attributed to the enhanced plant growth and
resistance against BBTV whereas, the same treatments after virus
inoculation did not induce resistance. This study has proved that the
time of application of consortia of bio-inoculants determines their
effect of induced resistance to BBTV in micropropagated plants.
Not Available
 
Date 2018-11-20T04:43:33Z
2018-11-20T04:43:33Z
2018-10-01
 
Type Research Paper
 
Identifier 10.1080/09583157.2018.1514583
0958-3157
http://krishi.icar.gov.in/jspui/handle/123456789/12185
 
Language English
 
Relation Not Available;
 
Publisher Taylor & Francis Group