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Seminars & Workshops

iSYM Seminar @RIKEN Yokohama
Date: December 14th, 2017
Time: 14:00 - 15:00
Venue: Room E717/719, East Research Building, RIKEN Yokohama Campus
Language: English
Speaker: Prof. Scott C. Peck 
Biochemistry Department, University of Missouri, USA
TitleNew Insights into the Basis of Innate Immunity in Plants
Plants perceive potential pathogens by recognizing pathogen-associated molecular patterns (PAMPs) through plasma membrane (PM) receptors. Recognition of flg22, a 22 amino acid PAMP derived from the bacterial flagellum, by the receptor-like kinase FLS2 induces defense signaling responses and contributes to innate immunity by restricting bacterial invasion. We have developed quantitative phosphoproteomic technology to identify novel Arabidopsis proteins that are rapidly phosphorylated following PAMP treatments, and using reverse genetics, we have defined functions for a number of these candidates in innate immune responses.
Plant recognition of potential bacterial pathogens initiates the rapid deployment of defenses, thereby preventing colonization. Much of what is known about plant resistance against bacteria involves production of and response(s) to salicylic acid (SA). However, SA-independent mechanisms of resistance are known to exist but have been poorly defined. We found that the enhanced resistance of the MAP kinase phosphatase 1 (mkp1) mutant in Arabidopsis is genetically independent of SA production and signaling, providing possible insights into SA-independent mechanisms. We previously reported that resistance in mkp1involves the restriction of plant chemical signals used by virulent bacteria to induce of their type III secretion system (TTSS), and we also reported that this mechanism appears to be shared with PAMP-triggered immunity (PTI; Anderson et al., 2014). Because PTI, like the resistance in mkp1, previously has been found to be independent of SA, we examined if – and confirmed that – PTI restriction of effector delivery was also independent of SA. These results provide a simple explanation of a mode of SA-independent resistance that can be rapidly activated before SA production is initiated. Anderson et al (2014) Decreased abundance of type III secretion system-inducing signals in Arabidopsis mkp1 enhances resistance against Pseudomonas syringae. PNAS 111:6846-6851.
Host: Dr. Ken Shirasu, Plant Immunity Research Group, CSRS

Photo of Professor Scott C Peck at the seminar
iSYM Seminar @RIKEN Yokohama
Photo of Professor Heidi H Kong
Date: November 10th, 2017
Time: 11:00 - 12:00
Venue: Conference Room, 6F North Research Building, RIKEN Yokohama Campus
Language: English
Speaker:  Heidi H. Kong, M.D., M.H.Sc
Head, Cutaneous Microbiome and Inflammation Section, Adjunct Investigator, National Cancer Institute (NCI), Dermatology Branch
Title: The microbiome in healthy skin and atopic dermatitis
The varied topography of human skin offers a unique opportunity to study the body’s microenvironments and the functional and taxonomic composition of microbial communities. The general accessibility of skin also enables longitudinal clinical studies throughout the course of disease. Metagenomic analyses of diverse body sites in healthy humans have defined the skin microbiome as shaped by the local biogeography, yet marked by strong individuality. Additionally, strain-level variation of dominant species was heterogeneous and multiphyletic in healthy adults. Re-sampling months and years later revealed that despite the skin’s exposure to the external environment, the bacterial, fungal, and viral communities were largely stable over time. Strain and single nucleotide variant level analysis showed that individuals maintain, rather than reacquire prevalent microbes from the environment. Longitudinal stability of skin microbial communities informs clinical studies exploring alterations observed in disease states, such as the inflammatory skin disorder atopic dermatitis (commonly known as eczema). We are integrating shotgun metagenomic sequencing, culturing, and animal models to improve our understanding of atopic dermatitis. 
Host: Masayuki Amagai, M.D., Ph.D, Laboratory for Skin Homeostasis, IMS
iSYM Seminar @RIKEN Yokohama
Photo of Doctor Henrik Stotz
Date: October 24th, 2017
Time: 15:00 - 16:00
Venue: Room E717/719, East Research Building, RIKEN Yokohama Campus
Language: English
SpeakerDr. Henrik Stotz
School of Life and Medical Sciences, University of Hertfordshire, UK
Effector-triggered defence against apoplastic fungal pathogens of oilseed rape
Apoplastic fungal pathogens cause annual crop losses in the order of tens of billions of dollars each year.  At the University of Hertfordshire, we work on the two most important oilseed rape diseases in the UK, phoma stem canker and light leaf spot caused by Leptosphaeria spp. and Pyrenopeziza brassicae, respectively.  We hypothesise that receptors with extracellular leucine-rich repeat (eLRR) domains are responsible for R gene-mediated resistance against these apoplastic fungal pathogens.  We introduced the term effector-triggered defence to better describe resistance against pathogens that colonise the extracellular space of plant tissues. 
Sequenced oilseed rape (Brassica napus) genomes were used to identify eLRR genes and to determine their contribution to resistance against different classes of oilseed rape pathogens.  Efforts are underway to better understand temperature sensitivity of phoma stem canker resistance.  Evidence has been obtained that specific effectors of L. maculans suppress host defence responses.  Analysis of RNAseq data suggests cellular processes that are involved in host susceptibility to or resistance against L. maculans.  A better molecular understanding of effector-triggered defence will help plant breeders in more effectively managing disease losses caused by these fungal pathogens.
Host: Dr. Ken Shirasu, Plant Immunity Research Group, CSRS
Photo of Doctor Henrik Stotz at the seminar
iSYM 1st Innovation Seminar @RIKEN Yokohama
Date: October 5th, 2017
Photo of Doctor Derek Bartlem

Time: 10:30 - 11:30
Venue: Room 214/216, Central Research Building, RIKEN Yokohama Campus
Language: English
Speaker: Dr. Derek Bartlem
Head of Research USA, KWS Gateway Research Center, USA
KWS – a different kind of plant breeding company with research institutes in US and Europe.
This seminar will provide an introduction to an international plant breeding company that was first established over 160 years ago.  KWS is based in Germany and present in over 70 countries.  In addition to strong biotech research activities in Germany, the KWS Gateway Research Center was recently established as KWS’ North America plant biotech research facility in St. Louis, USA.  There is a strong focus on innovative research and new product development in KWS, and a very unique culture that provides a positive environment for scientists coming from both industry and academic backgrounds.  This seminar is focused towards academic researchers to explain the history and focus of KWS, and to encourage dialogue with you on potential opportunities for collaborating together.
Host: Dr. Ken Shirasu, Plant Immunity Research Group, CSRS
Photo of Doctor Derek Bartlem at the seminar

iSYM Seminar Series @RIKEN Yokohama
Date: September 29th, 2017
Time: 10:00 - 15:00
Venue: Room 214/216, Central Research Building, RIKEN Yokohama Campus
Language: English
10:00 - 10:45
Brad Day, Professor & Associate Chair for Research
Department of Plant, Soil and Microbial Sciences, Michigan State University, USA
"The plant guard cell as a paradigm for the analysis of immunity and pathogen virulence"
10:45 - 11:30 
Gregg A. Howe, MSU Foundation Professor, 
Department of Energy-Plant Research Laboratory; Department of Biochemistry and Molecular Biology; Plant Resilience Institute, Michigan State University, USA
 "Modularity in Jasmonate Signaling for Multi-stress Tolerance”  

(Lunch Break)

13:30 - 14:15    
Michael Thomashow, MSU Foundation Professor,  
Department of Energy-Plant Research Laboratory; Department of Plant, Soil and Microbial Sciences; Plant Resilience Institute, Michigan State University, USA
"Regulation of Freezing Tolerance and Salicylic Acid-Mediated Immunity by Arabidopsis CAMTA Transcription Factors”

14:15 - 15:00    
David B. Lowry, Assistant Professor, 
Department of Plant Biology, Michigan State University, USA
"The Genetic and Physiological Basis of Adaptation to Divergent Habitats" 
Host: Dr. Ken Shirasu, Plant Immunity Research Group, CSRS
CSRS Yokohama Seminar Series Organizer:
Keiko Sugimoto, Mitsunori Seo, and Makoto Hayashi

Photo of Professor Brad Day at the seminar
Photo of Professor Gregg A Howe at the seminar

iSYM Seminar @CSRS Yokohama
Date: August 30th, 2017
Time: 15:00 - 16:00
Venue: Room 717/719, East Research Building, RIKEN Yokohama Campus
Language: English
Dr. Ryoji Shinya
Senior Assistant with tenure (Principal Investigator)
Department of Agriculture, Meiji University
Bursaphelenchus okinawaensis: an emerging genetic model for plant-parasitic nematodes
Nematodes have successfully adapted to nearly every ecological niche and developed various unique morphological and ecological traits. In particular, the economically relevant plant-parasitic nematodes are diverged from free-living nematodes including the model organism Caenorhabditis elegans, and have highly specialized characteristics such as parasitism, morphology, and sexual traits. Unfortunately, most of the genetic techniques and tools developed in C. elegans research are not directly applicable to the plant-parasitic nematodes due to these differences. Therefore, little is known about the genes controlling such plant-parasitic nematode-specific functions. Recently, a genetically tractable system with the hermaphroditic nematode Bursaphelenchus okinawaensis is being developed to solve this problem. This seminar will introduce this emerging genetically tractable system for the study of plant-parasitic nematodes and explain how it works using the study of sex determination mechanisms as an example.
Host: Dr. Yasuhiro Kadota, Plant Immunity Research Group, CSRS

Photo of Doctor Ryoji Shinya at the seminar

iSYM "Biology of Symbiosis" Workshop
Dates: August 21st - 22nd, 2017
Place: RIKEN Yokohama Campus, Main Office Building, Lecture Hall (Koryuto Hall)
Language: English
The program of "Biology of Symbiosis" Workshop

Photo of Biology of Symbiosis workshop


Photo of Biology of Symbiosis workshop question time


Photo of Biology of Symbiosis Workshop group photo


 RIKEN Seminar 
Microbial fermentation products shape host immune system through epigenetic modifications 
Prof. Koji Hase(Division of Biochemistry, Faculty of Pharmaceutical Science, Keio University) 
Date: Tuesday, June 27, 2017 17:00-18:00 
Language: English 
Venue: Main Office Bldg. (Koryu-to)Hall, Yokohama Campus
※Live telecast from Wako
 <Wako: 408 Seminar Room, Chemical Biology Bldg.> 
<Kobe: N701-703 Seminar Room, Building A>   
<Tsukuba: Moriwaki Hall> 
HostHiroshi Ohno, M.D., Ph.D, Laboratory for Intestinal Ecosystem, IMS
 Seminar Poster

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