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Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP) >
BVAAP Vol.19 [2011] >
BVAAP Vol.19(2) [December 2011] >
| Title: | Bio control of Rhizoctonia solani Root-Rot by AM fungi and Pseudomonas fluorescens |
| Authors: | Neeraj
Singh, Kanchan |
| Issue Date: | Dec-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Experiments were carried out under field conditions to study the
effect of two arbuscular mycorrhizal fungal (AMF) bio control agents against
root-rot pathogen Rhizoctonia solani infecting Phaseolus vulgaris (Rabi Rajma).
Bio control agents viz, AMF and Pseudomonas fluorescens (Pf) alone or
in combination promoted plant-growth and reduced the root-rot disease severity.
Both the AM fungi induced better plant growth and decreased disease incidence
as compared to control i.e. R. solani (Rs) alone treatment. Besides
combined AMF, P. fluorescens also proved beneficial for disease control.
AMF+Pf combinations gave better results against root-rot disease. Bacterial
suspension of P. fluorescens inhibited the mycelial growth of R. solani and also
facilitated the AMF colonization in plant roots resulting in the increased
plant growth and biomass. A comparative study of cellular total soluble sugars,
ortho-dihydric phenol, flavonols and epicuticular wax was also done. Sugar content
was at minimum 75 days after sowing (DAS) in untreated control plants as
compared to plants inoculated with either AMF or Pf or either of the two
combined with R. solani. Epicuticular wax content of rajma leaves
forms physical barrier against various pathogens protecting the plants. It was
also significantly increased when the plants were treated with different AMF as
compared to diseased control. However, wax content decreased in R. solani alone treated
plants 75 DAS as compared to that 45 DAS. |
| Page(s): | 134-138 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-2412 (Online); 0771-7706 (Print) |
| Source: | BVAAP Vol.19(2) [December 2011]
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