Article
Microbiology
Jessie Fernandez, Victor Lopez, Lisa Kinch, Mariel A. Pfeifer, Hillery Gray, Nalleli Garcia, Nick Grishin, Chang-Hyun Khang, Kim Orth
Summary: The study identified two metalloproteinase enzymes, MoMca1 and MoMca2, in M. oryzae, which play significant roles in fungal growth and development, potentially regulating stress responses. The absence of these enzymes resulted in delays in fungal morphogenesis and insights into the mechanisms of M. oryzae pathogenicity.
Article
Microbiology
Pengyun Huang, Huijuan Cao, Yan Li, Siyi Zhu, Jing Wang, Qing Wang, Xiaohong Liu, Fu-Cheng Lin, Jianping Lu
Summary: This study reveals the functional diversity and complexity of melanin in different strains of Magnaporthe oryzae. Melanin promotes spore production in the rice blast pathogen, but its effect is related to the background melanin content of the wild-type strains. Transcription factors like Cnf1 have opposite effects on conidiophore differentiation in different strains. Pig1 regulates melanin synthesis in hyphae but not in conidiophores, spores, or appressoria.
FRONTIERS IN MICROBIOLOGY
(2022)
Review
Agriculture, Multidisciplinary
Hai-feng Zhang, Tofazzal Islam, Wen-de Liu
Summary: This article introduces and summarizes the classification, geographical distribution, host range, disease symptoms, biology and ecology, economic impact, and integrated pest management (IPM) program of rice and wheat blast diseases.
JOURNAL OF INTEGRATIVE AGRICULTURE
(2022)
Article
Agronomy
Ferran Sanchez-Sanuy, Roberto Mateluna-Cuadra, Keisuke Tomita, Kazunori Okada, Gian Attilio Sacchi, Sonia Campo, Blanca San Segundo
Summary: Exposure to high iron enhances resistance to Magnaporthe oryzae infection in rice plants, possibly through upregulating defense-related genes and increasing production of phytoalexins. The infection also modulates the expression of genes involved in iron homeostasis. Iron and reactive oxygen species colocalize at infection sites. Understanding the crosstalk between iron signaling and immune signaling holds great potential for improving blast resistance in rice.
Article
Plant Sciences
Dewei Yang, Shengping Li, Yueping Xiao, Ling Lu, Zichao Zheng, Dingzhong Tang, Haitao Cui
Summary: The study highlights the importance of rapid, high-amplitude transcriptional reprogramming in rice defense against blast fungus, with ribosome- and protein translation-related genes being significantly enriched among differentially expressed genes at 12 hpi in both susceptible and resistant cultivars. A core set of genes involved in response to both biotic and abiotic stress was identified, including metallothionein genes positively regulating rice resistance and a peroxidase gene negatively regulating it. This study provides novel insights into transcriptional reprogramming and serves as a valuable resource for functional studies on rice immune signaling components in resistance to blast disease.
PLANT CELL AND ENVIRONMENT
(2021)
Article
Microbiology
Lihong Dong, Yuming Ma, Cheng-Yen Chen, Lizheng Shen, Wenda Sun, Guobing Cui, Naweed I. Naqvi, Yi Zhen Deng
Summary: The rice blast fungus Magnaporthe oryzae produces the phytohormone auxin/IAA, which is crucial for its mycelial growth and pathogenic development. This study identified an indole-3-pyruvic acid (IPA)-dependent IAA synthesis pathway in M. oryzae, consisting of the enzymes tryptophan aminotransferase (MoTam1) and indole-3-pyruvate decarboxylase (MoIpd1).
Article
Ecology
Kuleshwar Prasad Sahu, Aundy Kumar, Asharani Patel, Mukesh Kumar, S. Gopalakrishnan, G. Prakash, R. Rathour, Robin Gogoi
Summary: Dark brown necrotic lesions caused by Magnaporthe oryzae on rice foliage provide a contrasting microhabitat for leaf-colonizing microbiome, with 17 bacterial species identified in these lesions showing biocontrol potential against the pathogen. Over 50% of the bacterial isolates were able to suppress the growth of M. oryzae, with certain strains triggering the expression of defense genes in rice, indicating their potential as biocontrol agents for managing rice blast disease.
Article
Agronomy
Ammarah Shabbir, Wajjiha Batool, Dan Yu, Lili Lin, Qiuli An, Chen Xiaomin, Hengyuan Guo, Shuangshuang Yuan, Sekete Malota, Zonghua Wang, Justice Norvienyeku
Summary: This study characterized the biological function of endoxylanase I genes in the development of the rice blast fungus M. oryzae. MoXYL1A was found to be important for the virulence of M. oryzae, while MoXYL1B had a critical function in asexual reproduction of the fungus.
Article
Biochemistry & Molecular Biology
Shang Gao, Yan Hou, Qiwei Huang, Pengzhi Wu, Zhikai Han, Danhong Wei, Huabin Xie, Fengwei Gu, Chun Chen, Jiafeng Wang
Summary: In this study, the important role of Osa-miR11117 in regulating rice defense mechanisms was investigated. It was found that Osa-miR11117 targets OsPAO4 to regulate blast resistance by adjusting polyamine metabolism and ethylene signaling pathways.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Biotechnology & Applied Microbiology
Takayuki Motoyama, Choong-Soo Yun, Hiroyuki Osada
Summary: Filamentous fungi have numerous secondary metabolism genes producing a wide variety of secondary metabolites with unclear roles. Among them, Pyricularia oryzae, a plant pathogenic fungus, has a large number of secondary metabolism genes but only four groups have been well characterized. Activation of secondary metabolism has identified the biosynthetic genes for some of these secondary metabolites.
JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY
(2021)
Article
Plant Sciences
Zobaida Lahari, Sarah van Boerdonk, Olumide Owolabi Omoboye, Michael Reichelt, Monica Hofte, Jonathan Gershenzon, Godelieve Gheysen, Chhana Ullah
Summary: This study reveals the negative role of strigolactones (SLs) in rice defense against the blast fungus Pyricularia oryzae. SL deficiency in rice leads to higher accumulation of jasmonates, sugars, and flavonoid phytoalexins, which reduces susceptibility to P. oryzae. There is a reciprocal positive interaction between jasmonates and sugars. Functional jasmonate signaling is necessary for SL deficiency to induce rice defense against P. oryzae.
Article
Plant Sciences
Kanyanat Lamanchai, Nicholas Smirnoff, Deborah L. Salmon, Athipat Ngernmuen, Sittiruk Roytrakul, Kantinan Leetanasaksakul, Suthathip Kittisenachai, Chatchawan Jantasuriyarat
Summary: This study investigates the role of the OsVTC1-1 gene in rice blast fungus inoculation and finds that the gene regulates rice blast resistance through multiple defense mechanisms, including hormone synthesis and signaling pathways.
Article
Multidisciplinary Sciences
Alejandra Martinez-D'Alto, Xia Yan, Tyler C. Detomasi, Richard I. Sayler, William C. Thomas, Nicholas J. Talbot, Michael A. Marletta
Summary: Blast disease caused by the fungus Magnaporthe oryzae leads to significant crop loss in cereal plants. The study shows that the expression of the putative polysaccharide monooxygenase MoPMO9A is increased during infection. MoPMO9A exhibits activity on cereal-derived mixed β-D-glucans and its domain architecture is different from other characterized AA9 PMOs. The results suggest that MoPMO9A plays a role in MBG degradation during plant infection.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Biochemistry & Molecular Biology
Xiaoqing Ma, Guihua Duan, Hongfeng Chen, Ping Tang, Shunyu Su, Zhaoxia Wei, Jing Yang
Summary: This study investigated the characteristics of different stages of Magnaporthe oryzae infecting rice and identified the role of jasmonic acid (JA) signaling in the defense response of rice. The study found that the biotrophic phase of M. oryzae-LTH compatible interaction was longer than that of M. oryzae-Acuce incompatible interaction. Additionally, the study revealed that exogenous JA and a JA inhibitor, Ibuprofen, had different effects on the blast symptoms in infected rice at different time points. The findings suggest that JA-mediated defense mechanism is essential in regulating rice resistance during specific stages of M. oryzae infection.
PLANT MOLECULAR BIOLOGY
(2022)
Article
Genetics & Heredity
Mohammed Javed, Bhaskar Reddy, Neelam Sheoran, Prakash Ganesan, Aundy Kumar
Summary: This study identified the roles of miRNAs and their target genes in different rice genotypes with resistance or susceptibility to blast disease. Significant differences were found between the resistant and susceptible genotypes, as well as several shared miRNAs and novel miRNAs. These findings provide valuable insights for the development of resistant rice varieties and can improve crop management practices to ensure global food security.