Journal ArticleDOI
Sheath blight of rice: a review and identification of priorities for future research
TLDR
Rice sheath blight research should prioritise optimising biological control approaches, identification of resistance gene mechanisms and application in genetic improvement and smart farming for early disease detection.Abstract:
Rice sheath blight research should prioritise optimising biological control approaches, identification of resistance gene mechanisms and application in genetic improvement and smart farming for early disease detection. Rice sheath blight, caused by Rhizoctonia solani AG1-1A, is one of the most devasting diseases of the crop. To move forward with effective crop protection against sheath blight, it is important to review the published information related to pathogenicity and disease management and to determine areas of research that require deeper study. While progress has been made in the identification of pathogenesis-related genes both in rice and in the pathogen, the mechanisms remain unclear. Research related to disease management practices has addressed the use of agronomic practices, chemical control, biological control and genetic improvement: Optimising nitrogen fertiliser use in conjunction with plant spacing can reduce spread of infection while smart agriculture technologies such as crop monitoring with Unmanned Aerial Systems assist in early detection and management of sheath blight disease. Replacing older fungicides with natural fungicides and use of biological agents can provide effective sheath blight control, also minimising environmental impact. Genetic approaches that show promise for the control of sheath blight include treatment with exogenous dsRNA to silence pathogen gene expression, genome editing to develop rice lines with lower susceptibility to sheath blight and development of transgenic rice lines overexpressing or silencing pathogenesis related genes. The main challenges that were identified for effective crop protection against sheath blight are the adaptive flexibility of the pathogen, lack of resistant rice varieties, abscence of single resistance genes for use in breeding and low access of farmers to awareness programmes for optimal management practices.read more
Citations
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Genetic engineering of rice for resistance to sheath blight and other agronomic characters
S.K. Datta,C. Quimio,Lina Torrizo,K. Datta,M. F. Alam,E. Abrigo,N. Oliva,M. S. Alejar,S. Biswas,S. Mukthukrishnan,Ingo Potrykus,T. Setter,T. W. Mew,G.S. Khush +13 more
TL;DR: The degree of resistance displayed by the transgenic plants to this pathogen correlated with the level of chitinase expression, which indicated resistance to the sheath blight pathogen Rhizoctonia solani.
Journal ArticleDOI
Understanding sheath blight resistance in rice: the road behind and the road ahead
Kutubuddin A. Molla,Subhasis Karmakar,Johiruddin Molla,Prasad Bajaj,Rajeev K. Varshney,Swapan K. Datta,Karabi Datta +6 more
TL;DR: This review mainly focuses on the effort of better understanding the host–pathogen relationship, finding the gene loci/markers imparting resistance response and modifying the host genome through transgenic development.
Journal ArticleDOI
Gene Pyramiding for Achieving Enhanced Resistance to Bacterial Blight, Blast, and Sheath Blight Diseases in Rice.
J. Ramalingam,Chandavarapu Raveendra,P. Savitha,Venugopal Vidya,Thammannagowda Lingapatna Chaithra,Senthilvel Velprabakaran,R. Saraswathi,A. Ramanathan,Madhavan Pillai Arumugam Pillai,Samudrakani Arumugachamy,C. Vanniarajan +10 more
TL;DR: The present study successfully introgressed Pi54, and qSBR QTLs from Tetep and major effective BB-resistant genes (xa5, xa13, and Xa21) from IRBB60 into the commercial varieties for durable resistance to multiple diseases.
Journal ArticleDOI
Transcriptome analysis of rice leaves in response to Rhizoctonia solani infection and reveals a novel regulatory mechanism
De Peng Yuan,Xiao Feng Xu,Woo Jong Hong,Si Ting Wang,Xin Tong Jia,Yang Liu,Shuang Li,Zhi Min Li,Qian Sun,Qiong Mei,Shuai Li,Ki-Hong Jung,Song Hong Wei,Yuan Hu Xuan +13 more
TL;DR: An RNA sequencing analysis was performed using Rhizoctonia solani inoculated rice leaves after 48 h of inoculation to understand the rice defense mechanism against ShB, and the candidate genes identified will be useful resource for future breeding to enhance resistance againstShB.
Journal ArticleDOI
Strategies to Manage Rice Sheath Blight: Lessons from Interactions between Rice and Rhizoctonia solani.
TL;DR: In this article, the authors summarize the recent advances in studies on molecular interactions between rice and R. solani, and present several effective strategies to generate rice cultivars with enhanced sheath blight resistance.
References
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Journal ArticleDOI
Twenty five years of remote sensing in precision agriculture: Key advances and remaining knowledge gaps
TL;DR: A variety of spectral indices now exist for various precision agriculture applications, rather than a focus on only normalised difference vegetation indices as discussed by the authors, and the spectral bandwidth has decreased dramatically with the advent of hyperspectral remote sensing, allowing improved analysis of specific compounds, molecular interactions, crop stress, and crop biophysical or biochemical characteristics.
Journal ArticleDOI
Exposure to pesticides and the associated human health effects
TL;DR: A comprehensive review on pesticides with respect to their types, environmental distribution, routes of exposure, and health impacts is presented to reduce the impacts of pesticides.
Journal ArticleDOI
High-efficiency TALEN-based gene editing produces disease-resistant rice
TL;DR: TALEN technology is exploited to edit a specific S gene in rice to thwart the virulence strategy of X. oryzae and thereby engineer heritable genome modifications for resistance to bacterial blight, a devastating disease in a crop that feeds half of the world’s population.
Journal ArticleDOI
Targeted mutagenesis in rice using CRISPR-Cas system.
Jin Miao,Dongshu Guo,Jinzhe Zhang,Qingpei Huang,Genji Qin,Xin Zhang,Jianmin Wan,Hongya Gu,Li-Jia Qu +8 more
TL;DR: It is demonstrated in this study that the CRISPR/Cas technology can achieve efficient targeted mutagenesis in transgenic rice and paves the way for large-scale genome editing in rice, which is important for quality improvement and yield increase of rice.