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. 2022 May 3:13:881116.
doi: 10.3389/fpls.2022.881116. eCollection 2022.

Rhizoctonia solani Kühn Pathophysiology: Status and Prospects of Sheath Blight Disease Management in Rice

Manoranjan Senapati  1 , Ajit Tiwari  1 , Neha Sharma  1 , Priya Chandra  2 , Bishnu Maya Bashyal  2 , Ranjith Kumar Ellur  1 , Prolay Kumar Bhowmick  1 , Haritha Bollinedi  1 , K K Vinod  1 , Ashok Kumar Singh  1 , S Gopala Krishnan  1
Affiliations

Rhizoctonia solani Kühn Pathophysiology: Status and Prospects of Sheath Blight Disease Management in Rice

Manoranjan Senapati et al. Front Plant Sci. .

Abstract

Sheath blight caused by necrotrophic fungus Rhizoctonia solani Kühn is one of the most serious diseases of rice. Use of high yielding semi dwarf cultivars with dense planting and high dose of nitrogenous fertilizers accentuates the incidence of sheath blight in rice. Its diverse host range and ability to remain dormant under unfavorable conditions make the pathogen more difficult to manage. As there are no sources of complete resistance, management through chemical control has been the most adopted method for sheath blight management. In this review, we provide an up-to-date comprehensive description of host-pathogen interactions, various control measures such as cultural, chemical, and biological as well as utilizing host plant resistance. The section on utilizing host plant resistance includes identification of resistant sources, mapping QTLs and their validation, identification of candidate gene(s) and their introgression through marker-assisted selection. Advances and prospects of sheath blight management through biotechnological approaches such as overexpression of genes and gene silencing for transgenic development against R. solani are also discussed.

Keywords: Rhizoctonia solani; biological control; disease resistance; resistance QTLs; rice sheath blight (ShB); transgenic rice.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

FIGURE 1
FIGURE 1
Symptom of sheath blight disease in rice; left side shows the initial symptoms appear on leaf sheath starting from water level, and the right side shows the disease spread up to panicle.
FIGURE 2
FIGURE 2
Disease cycle of sheath blight of rice caused by Rhizoctonia solani AG1-IA.
FIGURE 3
FIGURE 3
Geographical distribution of sheath blight disease occurrence in different countries of the world.
FIGURE 4
FIGURE 4
A consolidated chromosomal map showing the QTLs mapped and the markers linked to sheath blight resistance in rice. qSHB, qSB, qSBR, and qSBD indicate the quantitative trait loci for sheath blight disease resistance.
FIGURE 5
FIGURE 5
Genes are being utilized for the development of transgenics and their mode of action in conferring resistance to sheath blight disease of rice. The blue circle indicates the genes, the details of their mode of action are given in Table 5.
See this image and copyright information in PMC

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