Biological Control of Bacterial Blight of Rice

Gnanamanickam, S. S.

doi:10.1007/978-90-481-2465-7_5

Cited by 7 publications

(5 citation statements)

References 23 publications

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“…Bacterial blight has become one of the most severe and prevalent rice diseases globally ( Leach et al, 1992 ; Adhikari et al, 1995 ). Strategies for managing this disease include cultivating disease-resistant rice varieties, application of chemical pesticides, and the use of antagonistic bacteria, many of which were recovered from the rhizosphere, phyloplane, or endophytic tissues of rice or other plant sources ( Gnanamanickam, 2009 ; Gangwar, 2013 ; Krishnan et al, 2014 ; Chung et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Bacterial Blight Induced Shifts in Endophytic Microbiome of Rice Leaves and the Enrichment of Specific Bacterial Strains With Pathogen Antagonism

Yang

Zhang

et al. 2020

Front. Plant Sci.

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The endophytic microbiome plays an important role in plant health and pathogenesis. However, little is known about its relationship with bacterial blight (BB) of rice caused by Xanthomonas oryzae pv. oryzae (Xoo). The current study compared the community compositional structure of the endophytic microbiota in healthy and BB symptomatic leaves of rice through a metabarcoding approach, which revealed BB induced a decrease in the alpha-diversity of the fungal communities and an increase in the bacterial communities. BB-diseased rice leaves were enriched with saprophytic fungi that are capable of decomposing plant cell walls (e.g. Khuskia spp. and Leptosphaerulina spp.), while healthy rice leaves were found to be significantly more abundant with plant pathogens or mycotoxin-producing fungi (e.g. Fusarium, Magnaporthe, and Aspergillus). The endophytic bacterial communities of BB-diseased leaves were significantly enriched with Pantoea, Pseudomonas, and Curtobacterium, strains. Pantoea sp. isolates from BB leaves are identified as promising candidates for the biocontrol of BB for their ability to inhibit in vitro growth of Xoo, suppress the development of rice BB disease, and possess multiple PGP characteristics. Our study revealed BB-induced complexed changes in the endophytic fungal and bacterial communities of rice leaves and demonstrated that BB-associated enrichment of some endophytic bacterial taxa, e.g. Pantoea sp. isolates, may play important roles in suppressing the development of BB disease in rice.

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Section: Introductionmentioning

confidence: 99%

Bacterial Blight Induced Shifts in Endophytic Microbiome of Rice Leaves and the Enrichment of Specific Bacterial Strains With Pathogen Antagonism

Yang

Zhang

et al. 2020

Front. Plant Sci.

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“…and Pseudomonas spp. also have been used to suppress rice leaf blight 10 . However, pathogen variation and the lack of suitable biological agents limit the efficacy of biological controls, although such measures remain a suitable method for disease control and management because they are environmentally friendly.…”

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confidence: 99%

Niclosamide inhibits leaf blight caused by Xanthomonas oryzae in rice

Kim

Song

Jeong

et al. 2016

Sci Rep

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Rice leaf blight, which is caused by the bacterial pathogen Xanthomonas oryzae pv. oryzae (Xoo), results in huge losses in grain yield. Here, we show that Xoo-induced rice leaf blight is effectively controlled by niclosamide, an oral antihelminthic drug and molluscicide, which also functions as an anti-tumor agent. Niclosamide directly inhibited the growth of the three Xoo strains PXO99, 10208 and K3a. Niclosamide moved long distances from the site of local application to distant rice tissues. Niclosamide also increased the levels of salicylate and induced the expression of defense-related genes such as OsPR1 and OsWRKY45, which suppressed Xoo-induced leaf wilting. Niclosamide had no detrimental effects on vegetative/reproductive growth and yield. These combined results indicate that niclosamide can be used to block bacterial leaf blight in rice with no negative side effects.

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“…oryzae Xoo , and is one of the most destructive diseases of this essential crop. The disease can lead to yield losses of up to 50 or 60 % in tropical regions throughout Asia Adhikari et al, 1994;Dinh et al, 2008;Gnanamanickam, 2009 and it has occurred in many rice cultivating areas of Vietnam Dinh et al, 2008 . In addition to using chemicals and oil-separation method Hop et al, 2011 .…”

Section: B a C T E R I A L B L I G H T B B O F R I C E I S C A U S E mentioning

confidence: 99%

Biological Control of Xanthomonas Oryzae pv. Oryzae Causing Rice Bacterial Blight Disease by Streptomyces toxytricini VN08-A-12, Isolated from Soil and Leaf-litter Samples in Vietnam

et al. 2014

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A total of 2690 actinomycete strains were screened as potential biological control agents in controlling rice bacterial blight BB in Vietnam. From these microorganisms, seventeen actinomycete strains were found to be capable of inhibiting all 10 major Xoo races isolated from Xoo-infected rice leaves. One strain, namely VN08-A-12, contained effective characteristics in selectively inhibiting all 10 Xoo races in vitro, but did not inhibit most of the other tested microorganisms. Therefore, VN08-A-12 was subsequently selected for rice field trials for two seasons on two rice cultivars SS1 and KD18. Results showed VN08-A-12 was not only able to reduce Xoo lesion lengths in the two rice cultivars lesion length reduction of up to 38.3 % , but it also significantly reduced Xoo-related yield loss in infected rice cultivars from the field yield loss reduction of up to 43.2 % . Interestingly, the culture of this strain also increased the rice yield in healthy rice cultivars from 2.66 % to 16.98 % for SS1 and from 3.11 % to 5.94 % for KD18 cultivar . The strain VN08-A-12 was shown to be identical to Streptomyces toxytricini. To our knowledge, this is the first study reporting S. toxytricini as a beneficial biological agent for the control of BB in rice.

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Biological Control of Bacterial Blight of Rice

Cited by 7 publications

References 23 publications

Bacterial Blight Induced Shifts in Endophytic Microbiome of Rice Leaves and the Enrichment of Specific Bacterial Strains With Pathogen Antagonism

Bacterial Blight Induced Shifts in Endophytic Microbiome of Rice Leaves and the Enrichment of Specific Bacterial Strains With Pathogen Antagonism

Niclosamide inhibits leaf blight caused by Xanthomonas oryzae in rice

Biological Control of Xanthomonas Oryzae pv. Oryzae Causing Rice Bacterial Blight Disease by Streptomyces toxytricini VN08-A-12, Isolated from Soil and Leaf-litter Samples in Vietnam

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