Antagonistic Potential of Isolates of Trichoderma spp. and Pseudomonas fluorescens Against Rice Sheath Blight Pathogen Rhizoctonia solani In vitro

2018 ◽  
Vol 6 (5) ◽  
pp. 391-395
Author(s):  
Chrianjeevi, N. ◽  
Keyword(s):  
Rhizoctonia Solani ◽  
Pseudomonas Fluorescens ◽  
Sheath Blight ◽  
Rice Sheath Blight ◽  
Trichoderma Spp ◽  
Antagonistic Potential

scholarly journals Evolution from Natural β-Carboline Alkaloids to Obtain 1,2,4,9-tetrahydro-3-thia-9-aza-fluorene Derivatives as Potent Fungicidal Agents against Rhizoctonia solani

2018 ◽  
Vol 19 (12) ◽  
pp. 4044 ◽  
Author(s):  
Junmin Xi ◽  
Zhijun Zhang ◽  
Qi Zhu ◽  
Guohua Zhong
Keyword(s):  
Rhizoctonia Solani ◽  
Fungicidal Activity ◽  
Sheath Blight ◽  
Potential Candidate ◽  
Oxygen Species ◽  
Rice Sheath Blight ◽  
Validamycin A ◽  
Rice Disease

Rice sheath blight, caused by Rhizoctonia solani, is a globally important rice disease and the increasing resistance of this pathogen highlights the need for new active compounds against rice sheath blight. In this study, natural β-carboline alkaloids were optimized to obtain a series of 1,2,4,9-tetrahydro-3-thia-9-aza-fluorene derivatives and evaluated for their fungicidal activity and mode of action against R. solani. Of these compounds, 18 exhibited significant in vitro fungicidal activity against R. solani, with an EC50 value of 2.35 μg/mL, and was more active than validamycin A. In vivo bioassay also demonstrated that 18 displayed superior protective and curative activities as compared to validamycin A. Mechanistically, 18 not only induced the loss of mitochondrial membrane potential and accumulation of reactive oxygen species, but also interfered with DNA synthesis. Therefore, compound 18 displayed pronounced in vitro and in vivo fungicidal activity against R. solani and could be used as a potential candidate for the control of rice sheath blight.

scholarly journals In vitro and in vivo antifungal properties of silver nanoparticles against Rhizoctonia solani , a common agent of rice sheath blight disease

2016 ◽  
Vol 11 (3) ◽  
pp. 236-240 ◽  
Author(s):  
Meysam Soltani Nejad ◽  
Gholam Hosein Shahidi Bonjar ◽  
Mehrdad Khatami ◽  
Abbas Amini ◽  
Sonia Aghighi
Keyword(s):  
Silver Nanoparticles ◽  
Rhizoctonia Solani ◽  
Sheath Blight ◽  
Rice Sheath Blight ◽  
Sheath Blight Disease ◽  
Antifungal Properties ◽  
Blight Disease

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
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