Article
Genetics & Heredity
Xinyao He, Philomin Juliana, Muhammad R. Kabir, Krishna K. Roy, Rabiul Islam, Felix Marza, Gary Peterson, Gyanendra P. Singh, Aakash Chawade, Arun K. Joshi, Ravi P. Singh, Pawan K. Singh
Summary: A genome wide association study was conducted on wheat genotypes to identify stable resistance to wheat blast (WB), with most resistant accessions being carriers of the 2NS region and some exhibiting moderate resistance in the 2AS region. Significant marker-trait associations were found on chromosomes 1BS, 2AS, 6BS, and 7BL, with consistent MTAs on 2AS at the 2NS/2AS translocation region.
FRONTIERS IN GENETICS
(2021)
Article
Agronomy
Gustavo Bilibio dos Santos, Mauricio Antonio de Oliveira Coelho, Emerson Medeiros Del Ponte
Summary: This study aimed to understand and predict yield losses due to wheat blast using visual assessment of two disease variables. The results showed a negative correlation between the incidence and severity of wheat blast and yield. When the incidence or severity reached 10%, the predicted yield losses were 18.4% and 26.1% respectively.
EUROPEAN JOURNAL OF PLANT PATHOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Wei Li, Yehui Xiong, Lien B. Lai, Kai Zhang, Zhiqiang Li, Houxiang Kang, Liangying Dai, Venkat Gopalan, Guo-Liang Wang, Wende Liu
Summary: OsRpp30, functioning as a catalytic ribonucleoprotein RNP subunit in rice, plays multiple roles including chromatin regulation and innate immunity. It is shown to increase expression post-infection, co-localize with HDT701 in the nucleus, and enhance defense gene expression and ROS production, resulting in resistance to fungal and bacterial pathogens in rice. OsRpp30, conserved in grass crops, co-purifies with RNase P pre-tRNA cleavage activity and has a crucial role in defense regulation, suggesting its potential for generating disease-resistant rice cultivars.
PLANT BIOTECHNOLOGY JOURNAL
(2021)
Article
Agronomy
Leilane Silveira D'Avila, Marta Cristina Corsi De Filippi, Adalberto C. Cafe-Filho
Summary: Rice blast isolates from different regions of Brazil exhibit varying levels of resistance to fungicides. Despite some impairments, the proportion of resistant and sensitive isolates remained constant under continuous fungicide applications.
Article
Plant Sciences
Yingmin Qu, Jing Wang, Pengyun Huang, Xiaohong Liu, Jianping Lu, Fu-Cheng Lin
Summary: Pyricularia oryzae, a plant pathogenic fungus, damages rice and wheat crops through appressorium-led tissue invasion, regulated by cAMP-PKA and Pmk1 MAPK pathways. PoRal2 plays crucial roles in fungal development and virulence by influencing appressorium formation.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Yoshihiro Inoue, Trinh Thi Phuoug Vy, Daichi Tani, Yukio Tosa
Summary: The wheat blast caused by the Triticum pathotype of Pyricularia oryzae is posing a serious threat to wheat production in South America and Asia, and it is now considered a pandemic disease. It has been found that the promising wheat gene for resistance breeding, Rmg8, can be suppressed by the effector gene of P. oryzae, PWT4, but this suppression can be counteracted by the wheat gene recognizing PWT4, Rwt4. The horizontal transfer of PWT4 from a weed-associated cryptic species to the wheat blast fungus could potentially lead to the breakdown of Rmg8, highlighting the importance of introducing Rmg8 together with Rwt4 into wheat cultivars for resistance breeding.
Article
Biotechnology & Applied Microbiology
Dan Du, Changwei Zhang, Yadi Xing, Xin Lu, Linjun Cai, Han Yun, Qiuli Zhang, Yingying Zhang, Xinlong Chen, Mingming Liu, Xianchun Sang, Yinghua Ling, Zhenglin Yang, Yunfeng Li, Benoit Lefebvre, Guanghua He
Summary: A mutation in the OsRLR1 gene in rice leads to broad-spectrum resistance to fungal and bacterial pathogens, accompanied by growth reduction; OsRLR1 mediates defense response through direct interaction with the transcription factor OsWRKY19 in the nucleus; OsWRKY19 activates defense response by binding to the promoter of OsPR10.
PLANT BIOTECHNOLOGY JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Soichiro Asuke, Akiko Horie, Kaori Komatsu, Ryota Mori, Trinh Thi Phuong Vy, Yoshihiro Inoue, Yushan Jiang, Yuna Tatematsu, Motoki Shimizu, Yukio Tosa
Summary: Pyricularia oryzae, a blast fungus, has different host genus-specific pathotypes. The avirulence on wheat in an Avena isolate is determined by PWT3, PWT4, and the newly discovered PWT7 gene. PWT7 only functions as an avirulence gene during the seedling stage or on leaves, and it is widely distributed in the Eleusine and Lolium pathotypes but absent in the Triticum pathotype. The distribution pattern of PWT7 suggests a loss of this gene during parasitic specialization towards the wheat blast fungus in the common ancestor of Eleusine, Lolium, Avena, and Triticum pathotypes.
MOLECULAR PLANT-MICROBE INTERACTIONS
(2023)
Article
Environmental Sciences
Rasim Unan
Summary: Rice blast is a significant disease in rice production areas in Europe, and the study identified several blast resistance genes, such as Pi5, Pi12, and Pish, that showed stable resistance in field conditions in Turkey. These resistance genes can be utilized in breeding programs to develop stable resistant varieties against rice blast.
FRESENIUS ENVIRONMENTAL BULLETIN
(2022)
Article
Plant Sciences
Yushan Jiang, Soichiro Asuke, Trinh Thi Phuong Vy, Yoshihiro Inoue, Yukio Tosa
Summary: The study suggests that Rmg8 has relatively high durability against wheat blast, but the polymorphism and functional differences of AVR-Rmg8 may impact its effectiveness.
JOURNAL OF GENERAL PLANT PATHOLOGY
(2021)
Article
Genetics & Heredity
Akhil Thaker, Khyati Mehta, Rajesh Patkar
Summary: Fae1 gene was significantly upregulated during host penetration and subsequent colonisation stages, and its deletion mutant showed significantly reduced pathogenesis on rice plants mainly due to impaired host invasion and colonisation.
Article
Plant Sciences
Yoshihiro Inoue, Trinh Thi Phuong Vy, Soichiro Asuke, Yoshihiro Matsuoka, Yukio Tosa
Summary: Investigation into the distribution of wheat resistance genes Rwt3 and Rwt4 in the wild wheat progenitor species Aegilops tauschii revealed that Rwt3 is present in lineages with wider geographic distribution while Rwt4 is mainly found in lineages with narrow distribution, with the two genes co-occurring exclusively in a specific sublineage. This suggests that common wheat may have obtained Rwt3 and Rwt4 from Ae. tauschii individuals and that the common ancestor of common wheat possessed both genes during amphidiploidization.
JOURNAL OF GENERAL PLANT PATHOLOGY
(2021)
Article
Plant Sciences
Samuel K. Mutiga, Felix Rotich, Vincent M. Were, John M. Kimani, David T. Mwongera, Emmanuel Mgonja, Geoffrey Onaga, Kadougoudiou Konate, Claudine Razanaboahirana, Joseph Bigirimana, Alexis Ndayiragije, Emily Gichuhi, Mary J. Yanoria, Miriam Otipa, Lusike Wasilwa, Ibrahima Ouedraogo, Thomas Mitchell, Guo-Liang Wang, James C. Correll, Nicholas J. Talbot
Summary: Rice is a key food security crop in Africa, and efforts are being made at country-specific, regional, and multinational levels to develop germplasm and policies to boost production. Rice blast disease remains a major constraint to rice production in sub-Saharan Africa, and multinational collaborative research efforts are essential in enhancing sustainable rice production and advancing regional policies. Through international partnerships, progress has been made in establishing networks for disease surveillance, engaging with farmers, monitoring pathogen virulence, and developing blast-resistant rice varieties.
Article
Biochemistry & Molecular Biology
Sayaka Shimizu, Yuri Yamauchi, Atsushi Ishikawa
Summary: The study demonstrates the important influence of the light environment on the establishment of plant defense responses, with photoperiod playing a regulatory role in nonhost resistance to Pyricularia oryzae in Arabidopsis thaliana.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biology
Ba Van Vu, Quyet Nguyen, Yuki Kondo-Takeoka, Toshiki Murata, Naoki Kadotani, Giang Thi Nguyen, Takayuki Arazoe, Shuichi Ohsato, Hitoshi Nakayashiki
Summary: In fungi, homologous recombination and RNA silencing mechanisms cooperatively regulate the de novo DNA methylation of transposable elements such as MAGGY, with RecA domain-containing proteins and uncharacterized Ddnm1 protein forming complexes to mediate the process. Mutants of specific RNA silencing components in Pyricularia oryzae show impaired copy number-dependence of MAGGY methylation, suggesting a physical interaction between RNA silencing machinery and homologous recombination components.
COMMUNICATIONS BIOLOGY
(2021)
