scholarly journals Control of bacterial leaf blight and rice blast with antagonist microbial in the agroecosystem of irrigated rice

2021 ◽  
Vol 653 (1) ◽  
pp. 012137
Author(s):  
A B Pustika ◽  
K Yolanda ◽  
Sudarmaji
Keyword(s):  
Rice Blast ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Irrigated Rice

Evaluation of Improvement Effect of Restorer Lines on Pyramiding Genes Re-sistant to Rice Blast, Bacterial Leaf Blight and Brown Planthopper

2016 ◽  
Vol 42 (1) ◽  
pp. 31 ◽  
Author(s):  
Jue LOU ◽  
Wen-Qing YANG ◽  
Zhong-Xing LI ◽  
Tian-Kuan LUO ◽  
Yong-Chu XIE ◽  
...  
Keyword(s):  
Rice Blast ◽  
Brown Planthopper ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Improvement Effect

scholarly journals A Meta-Analysis of Quantitative Trait Loci Associated with Multiple Disease Resistance in Rice (Oryza sativa L.)

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1491
Author(s):  
Ilakiya Sharanee Kumar ◽  
Kalaivani Nadarajah
Keyword(s):  
Functional Analysis ◽  
Disease Resistance ◽  
Quantitative Trait Loci ◽  
Candidate Genes ◽  
Quantitative Trait ◽  
Rice Blast ◽  
Sheath Blight ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Defense Genes

Rice blast, sheath blight and bacterial leaf blight are major rice diseases found worldwide. The development of resistant cultivars is generally perceived as the most effective way to combat these diseases. Plant disease resistance is a polygenic trait where a combinatorial effect of major and minor genes affects this trait. To locate the source of this trait, various quantitative trait loci (QTL) mapping studies have been performed in the past two decades. However, investigating the congruency between the reported QTL is a daunting task due to the heterogeneity amongst the QTLs studied. Hence, the aim of our study is to integrate the reported QTLs for resistance against rice blast, sheath blight and bacterial leaf blight and objectively analyze and consolidate the location of QTL clusters in the chromosomes, reducing the QTL intervals and thus identifying candidate genes within the selected meta-QTL. A total of twenty-seven studies for resistance QTLs to rice blast (8), sheath blight (15) and bacterial leaf blight (4) was compiled for QTL projection and analyses. Cumulatively, 333 QTLs associated with rice blast (114), sheath blight (151) and bacterial leaf blight (68) resistance were compiled, where 303 QTLs could be projected onto a consensus map saturated with 7633 loci. Meta-QTL analysis on 294 QTLs yielded 48 meta-QTLs, where QTLs with membership probability lower than 60% were excluded, reducing the number of QTLs within the meta-QTL to 274. Further, three meta-QTL regions (MQTL2.5, MQTL8.1 and MQTL9.1) were selected for functional analysis on the basis that MQTL2.5 harbors the highest number of QTLs; meanwhile, MQTL8.1 and MQTL9.1 have QTLs associated with all three diseases mentioned above. The functional analysis allows for determination of enriched gene ontology and resistance gene analogs (RGAs) and other defense-related genes. To summarize, MQTL2.5, MQTL8.1 and MQTL9.1 have a considerable number of R-genes that account for 10.21%, 4.08% and 6.42% of the total genes found in these meta-QTLs, respectively. Defense genes constitute around 3.70%, 8.16% and 6.42% of the total number of genes in MQTL2.5, MQTL8.1 and MQTL9.1, respectively. This frequency is higher than the total frequency of defense genes in the rice genome, which is 0.0096% (167 defense genes/17,272 total genes). The integration of the QTLs facilitates the identification of QTL hotspots for rice blast, sheath blight and bacterial blight resistance with reduced intervals, which helps to reduce linkage drag in breeding. The candidate genes within the promising regions could be utilized for improvement through genetical engineering.

scholarly journals Riboflavin-based BioDoctorTM Induced Disease Resistance against Rice Blast and Bacterial Leaf Blight Diseases

2016 ◽  
Vol 22 (3) ◽  
pp. 202-207
Author(s):  
Beom Ryong Kang ◽  
Song Hee Han ◽  
Chul Hong Kim ◽  
Young Cheol Kim
Keyword(s):  
Disease Resistance ◽  
Rice Blast ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Induced Disease Resistance

scholarly journals Ginger Essential Oils-Loaded Nanoemulsions: Potential Strategy to Manage Bacterial Leaf Blight Disease and Enhanced Rice Yield

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3902
Author(s):  
Abdullahi Adamu ◽  
Khairulmazmi Ahmad ◽  
Yasmeen Siddiqui ◽  
Intan Safinar Ismail ◽  
Norhayu Asib ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Electron Microscope ◽  
Essential Oils ◽  
Disease Severity ◽  
Rice Yield ◽  
Cell Structure ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Control Treatment ◽  
Promising Alternative

The bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. oryzae (Xoo) is one of the most serious rice diseases, causing huge yield losses worldwide. Several technologies and approaches have been opted to reduce the damage; however, these have had limited success. Recently, scientists have been focusing their efforts on developing efficient and environmentally friendly nanobactericides for controlling bacterial diseases in rice fields. In the present study, a scanning electron microscope (SEM), transmission electron microscope (TEM), and a confocal laser scanning microscope (CLSM) were utilized to investigate the mode of actions of ginger EOs on the cell structure of Xoo. The ginger EOs caused the cells to grow abnormally, resulting in an irregular form with hollow layers, whereas the dimethylsulfoxide (DMSO) treatment showed a typical rod shape for the Xoo cell. Ginger EOs restricted the growth and production of biofilms by reducing the number of biofilms generated as indicated by CLSM. Due to the instability, poor solubility, and durability of ginger EOs, a nanoemulsions approach was used, and a glasshouse trial was performed to assess their efficacy on BLB disease control. The in vitro antibacterial activity of the developed nanobactericides was promising at different concentration (50–125 µL/mL) tested. The efficacy was concentration-dependent. There was significant antibacterial activity recorded at higher concentrations. A glasshouse trial revealed that developed nanobactericides managed to suppress BLB disease severity effectively. Treatment at a concentration of 125 μL/mL was the best based on the suppression of disease severity index, AUDPC value, disease reduction (DR), and protection index (PI). Furthermore, findings on plant growth, physiological features, and yield parameters were significantly enhanced compared to the positive control treatment. In conclusion, the results indicated that ginger essential oils loaded-nanoemulsions are a promising alternative to synthetic antibiotics in suppressing Xoo growth, regulating the BLB disease, and enhancing rice yield under a glasshouse trial.

Bacterial leaf blight of sweet pepper (Capsicum annuum) caused by Pseudomonas cichorii in Japan

2013 ◽  
Vol 80 (1) ◽  
pp. 103-107 ◽  
Author(s):  
Rie Gappa-Adachi ◽  
Yasuaki Morita ◽  
Yoshifumi Shimomoto ◽  
Shigeharu Takeuchi
Keyword(s):  
Capsicum Annuum ◽  
Sweet Pepper ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Pseudomonas Cichorii
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