The 32nd Hiroshima University Biomass Evening Seminar



Biomass Project Research Center, Hiroshima University, and HOSTY Association are co-organizing the Hiroshima University Biomass Evening Seminar. This seminar covers topics from the fundamentals of biomass to the latest information so that it can contribute the activities on biomass in this district. The 32nd seminar will be held as follows. Please join.

  • Date & Time: Fri.19 Jun., 2015 16:20-17:50
  • Place: Engineering 110 Lecture Room, Higashi-Hiroshima Campus, Hiroshima University

<Program>

  • Commentary: Yukihiko MATSUMURA

    Professor, Institute of Engineering, Hiroshima University
  • Lecture: Hiroshi Nonaka

    Associate Professor, Graduate School of Bioresources

    Mie University

“Separation of the components from lignocellulosic biomass

Wood and stems of crops etc. are "lignocellulose" mainly composed of cellulose, hemicellulose and lignin. Because the three polymers form interpenetrating polymer network structure, it is almost impossible to separate them as they are.

In this presentation, I talk about the problems of conventional separation methods and discuss the future of biorefinery process using lignicellulosic biomass.

  • Lecture: Mattana TUNCHAI

    D1 Student, Graduate School of Advanced Sciences of Matter, Hiroshima University

“Studies on inhibitory effects of malic acid on plant infection of Ralstonia solanacearum”

Ralstonia solanacearum causes bacterial wilt disease in many economically important corps worldwide. Directed-motility, called chemotaxis, allows R. solanacearum to efficiently migrate and attack host root which is considered as critical early step for invasion. In the other word, this pathogen locate the plant root by sensing key chemotaxis compounds from root exudate, and direct their movement to the root before invade into it. Thus, there is the possibility that soil amended with the key compounds may cause a delay or even suppression the infection. In this study we evaluated the effect of the compounds, which R. solanacearum exhibited highly chemotactic response to, toward its virulence. Interestingly, sand amended with malic acid resulted in significantly lower wilt disease in gnotobiotic system of tomato than non-treatment. To clarify whether chemotaxis is mechanism behind this inhibition, non-chemotactic mutant strain was applied to the system. There were no difference of virulent level between L-malic acid and non-treatment. This result indicated that L-malic acid may be able to suppress key chemotaxis of R. solanacearum. On the contrary, the inhibition effect on wilt disease still be observed from D-malic acid treatment. This result can be explain by the evident that D-malic acid partially exhibited suppression effect on twitching motility, which is also required for full virulence in R. solanacearum.

  • Chair: Thachanan SAMANMULYA

    Assistant Professor, Institute of Engineering, Hiroshima University
We will hold the discussion meeting from 18:00 (800 JPY needed). Join this meeting, too if you are available.

[Inquiries about this article]



Graduate School of Engineering, Hiroshima University

Y.NAKASHIMA

Mail: y4naka [AT] hiroshima-u.ac.jp

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