scholarly journals Involvement of secondary metabolites and extracellular lytic enzymes produced by Pseudomonas fluorescens in inhibition of Rhizoctonia solani, the rice sheath blight pathogen

2004 ◽  
Vol 159 (1) ◽  
pp. 73-81 ◽  
Author(s):  
M. Nagarajkumar ◽  
R. Bhaskaran ◽  
R. Velazhahan
Keyword(s):  
Secondary Metabolites ◽  
Rhizoctonia Solani ◽  
Pseudomonas Fluorescens ◽  
Sheath Blight ◽  
Rice Sheath Blight ◽  
Lytic Enzymes

scholarly journals Secondary metabolites of rice sheath blight pathogen Rhizoctonia solani Kühn and their biological activities

2015 ◽  
Vol 14 (1) ◽  
pp. 80-87 ◽  
Author(s):  
Liang XU ◽  
Xiao-han WANG ◽  
Rui-ya LUO ◽  
Shi-qiong LU ◽  
Ze-jian GUO ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Rhizoctonia Solani ◽  
Biological Activities ◽  
Sheath Blight ◽  
Rice Sheath Blight

Effects of straw incorporation on Rhizoctonia solani inoculum in paddy soil and rice sheath blight severity

2013 ◽  
Vol 152 (5) ◽  
pp. 741-748 ◽  
Author(s):  
H. ZHU ◽  
Z. X. WANG ◽  
X. M. LUO ◽  
J. X. SONG ◽  
B. HUANG
Keyword(s):  
Rhizoctonia Solani ◽  
Disease Severity ◽  
Rice Straw ◽  
Paddy Soil ◽  
Sheath Blight ◽  
Soil Productivity ◽  
Rice Sheath Blight ◽  
Important Method ◽  
Pathogen Dynamics ◽  
Straw Incorporation

SUMMARYIncorporation of rice straw into soil has traditionally been an important method of recycling nutrients and improving soil productivity. Currently, although the effects of straw incorporation on disease severity have been documented, the dynamics of the pathogen in soil after straw incorporation are poorly understood. In the present study, rice straw with various proportions of diseased straw was incorporated at three separate locations (SuPu town, SuSong County and FengYang County) in Anhui province, China. The pathogen dynamics in paddy soil and disease severity of sheath blight during two continuous years from April 2010 to April 2012 were investigated. For all three locations, the amount of pathogen inoculum that persisted in the soil increased with increases in the proportion of diseased straw incorporated. Incorporation of 0·3 and 0·5 diseased straw into soil increased the amount of pathogen inoculum in the soil significantly, whereas incorporation of 0·1 diseased straw into soil had no significant effect on the pathogen inoculum compared with the control (no straw incorporated) or disease severity. Incorporation of healthy rice straw (no disease) resulted in a significant decrease in disease severity, whereas proportions of 0·3 and 0·5 diseased straw resulted in a significant increase of disease severity compared with the control. These results suggested that incorporation of diseased straw enhanced pathogen numbers in soil during the whole decomposition period and increased disease severity. To avoid soil-borne disease accumulation, severely diseased straw should be removed from the field or pre-treated before incorporation.

Functional analysis of polygalacturonase gene RsPG2 from Rhizoctonia solani, the pathogen of rice sheath blight

2017 ◽  
Vol 149 (2) ◽  
pp. 491-502 ◽  
Author(s):  
Xijun Chen ◽  
Li Lili ◽  
Yun Zhang ◽  
Jiahao Zhang ◽  
Shouqiang Ouyang ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Rhizoctonia Solani ◽  
Sheath Blight ◽  
Rice Sheath Blight ◽  
Polygalacturonase Gene

scholarly journals Biological Control Activity of Two Isolates of Pseudomonas fluorescens against Rice Sheath Blight

2006 ◽  
Vol 22 (3) ◽  
pp. 289-294 ◽  
Author(s):  
Gyung-Ja Choi ◽  
Jin-Cheol Kim ◽  
Eun-Jin Park ◽  
Yong-Ho Choi ◽  
Kyoung-Soo Jang ◽  
...  
Keyword(s):  
Biological Control ◽  
Pseudomonas Fluorescens ◽  
Sheath Blight ◽  
Rice Sheath Blight ◽  
Control Activity

scholarly journals Rhizoctonia solani AG-1 IA infects both rice and signalgrass in the Colombian Llanos

2016 ◽  
Vol 46 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Lina Maria Ramos-Molina ◽  
Edisson Chavarro-Mesa ◽  
Danilo Augusto dos Santos Pereira ◽  
María del Rosario Silva-Herrera ◽  
Paulo Cezar Ceresini
Keyword(s):  
Rhizoctonia Solani ◽  
Species Complex ◽  
Molecular Detection ◽  
Sheath Blight ◽  
Pathogenicity Test ◽  
Rice Sheath Blight ◽  
Specific Primers ◽  
5.8S Rdna ◽  
Foliar Blight ◽  
Rhizoctonia Oryzae

ABSTRACT Foliar blight and death of signalgrass (Urochloa spp.) pastures are caused by the Rhizoctonia solani fungus. This study aimed at determining which pathogens from the Rhizoctonia species complex are associated with leaf and sheath blight in Urochloa and rice, in the Colombian Llanos. Sympatric areas of Urochloa pastures adjacent to rice cropping areas were sampled using a linear transect system. The pathogens were identified using morphological traits, molecular detection based on specific primers and sequencing of the ITS-5.8S rDNA region. R. solani AG-1 IA predominated as the pathogen associated with foliar blight in all samples from U. brizantha cv. 'Toledo' and hybrid Urochloa cv. 'Mulato'. Besides R. solani AG-1 IA (18 % of the samples), Rhizoctonia oryzae-sativae (71 %) and Sclerotium hydrophilum (11 %) were also detected. In the cross-pathogenicity test, the R. solani AG-1 IA fungus was the most aggressive to Urochloa, while R. oryzae-sativae produced very mild infection symptoms. This is the first report of R. oryzae-sativae and S. hydrophilum associated with the complex of rice sheath blight diseases in Colombia.

Sign in / Sign up

Export Citation Format

Share Document