The 61st Annual Meeting of The Japanese Society of Plant Physiologists
March 19-21, 2020 Osaka University
Outline
◆S01 Japan-Taiwan Joint Symposium: Front lines of post-transcriptional gene regulation in environmental responses
Date: 9:30-12:25, March 19 (Thursday), 2020
Venue: Room W
Organizers: Misato Ohtani (Grad. Sch. Front. Sci., Univ. Tokyo), Shih-Long Tu (Academia Sinica)
The post-transcriptional gene regulation is one of rapid-growing research topics in plant biology. This joint symposium aims to encourage collaborative research activities between Japan and Taiwan; for this purpose, we focus on the emergent importance of post-transcriptional gene regulation in environmental responses of plants. Based on the talks by Japanese and Taiwanese researchers, new perspectives and directions of plant environmental response researches will be discussed.
Crosstalk between light signaling and pre-mRNA splicing
snRNP biogenesis-mediated environmental adaptation in plants
Widespread exon junction complex footprints in the RNA degradome mark mRNA degradation before steady-state translation
Boron-dependent translation of a borate transporter BOR1 and its significance for adaptation to boron nutrient availability
Lost in translation? The determinants of the translational control and their impacts on plant gene expression
Reproductive system via microRNA producing secondary siRNAs in a photoperiodic environment
◆S02 Towards a unified understanding of local/systemic signaling and beyond in plant wound and immune responses
Date: 9:30-12:10, March 19 (Thursday), 2020
Venue: Room X
Organizers: Masatsugu Toyota (Dept. Biochem. & Mol. Biol., Saitama Univ.), Shigeyuki Betsuyaku (Fac. Life & Sci., Univ. Tsukuba)
Plants perceive local biotic stresses such as pathogen/herbivore attack and activate plant-wide defence responses to the future stresses, which is a phenomenon known as systemic acquired resistance in plant pathology. Recent live-cell imaging and molecular genetics are revealing not only the intra-plant (local/systemic) but also inter-plant (plant-to-plant) defence network systems. A goal of this symposium is a unified, spatio-temporal understanding of the seamless inter- and intra-plant defence signaling in both wound and immune responses of plants.
Spatiotemporal dynamics of the salicylate and jasmonate signaling pathways regulating plant immune and wound responses.
Spatial coordination of plant immunity at the organism level
Signal exchanges between parasitic plants and host plants to establish plant-plant connection
Rain induces a novel layer of plant immunity through trichome as a mechano-sensor
How plants perceive airborne signals in the shape of volatile organic compounds
Calcium-based intra- and inter-plant communication system
◆S3 Molecular basis of long-distance signaling in plants
Date: 9:30-12:30, March 19 (Thursday), 2020
Venue: Room Y
Organizers: Hitoshi Sakakibara (Nagoya Univ.), Koh Aoki (Osaka Pref. Univ.)
In plant vascular systems, long-distant movement of various information molecules involved in the regulation of morphogenesis and environmental responses has been demonstrated. However, mechanisms by which information mediated by these mobile molecules are integrated are still unknown. In this symposium, we focus on 1) interface between phloem/xylem cells and adjacent cells and 2) interplay between phloem and xylem transport, and seek directions toward the understanding of the mechanisms underlying the integration of systemically delivered information.
Importance of cytokinin systemic transport for fine-tuning of plant growth
Sieve Tube Structure Function Relations
Shoot-root communication underlying the control of nitrogen homeostasis in plants
Toward understanding the molecular mechanism of florigen transport in Arabidopsis shoot apex
Study on mobile mRNAs in plants
Visualizing and evaluating long-distance phloem transport of photoassimilates by the PETIS and 11CO2 tracer
Differential regulation of RNA unloading from phloem
◆S04 Molecular mechanism of cell proliferation and reprogramming- the chromatin perspective and beyond-
Date：9：30-12：30, March 19 (Thursday), 2020
Venue: Room Z
Organizers: Keiko Sugimoto (RIKEN CSRS) , Sachihiro Matsunaga (Tokyo University of Science)
Thanks to the recent advances in single cell RNA-seq technologies, we are beginning to understand the transcriptional basis of plant development and environmental responses at unprecedented cellular resolutions. It is also now evident that the progression of cell proliferation and differentiation is tightly regulated at the epigenetic level through histone modification and DNA methylation. In this symposium, we will discuss the latest advances in our research trying to uncover the transcriptional and epigenetic mechanisms of cellular proliferation, differentiation and reprogramming. This symposium is supported by a grant-in-aid for scientific research on innovative areas “Integrative system of autonomous environmental signal recognition and memorization for plant plasticity”.
Factors linking cell proliferation, genome replication and chromatin dynamics
Single-cell dissection of regenerating plant roots
Healing the damage: stress-induced cellular reprogramming in plants
Epigenetic priming for plant regeneration
Building beauty: the role of cell division and differentiation during petal patterning
◆S05 The highly specialized plant organs and cells -Its function and evolution-
Date：13:45-16:40, March 19 (Thursday), 2020
Venue：Room X
Organizers：Naoki Takahashi (NAIST), Makoto Shirakawa (NAIST)
Plants have evolved various specialized organs and cells (e.g. root hair, vasculature and stomata) to adapt fluctuating environmental conditions. Recent studies on model plants including Arabidopsis have revealed physiological roles and developmental mechanisms of specialized organs and cells. Additionally, improvement of imaging technologies and technological innovations such as RNAseq have been enable to analyze specialized organs and cells in non-model plants including carnivorous plants. In this symposium, eight speakers will talk about the latest research on developmenatal functions and molecular mechanisms of specialized organs and cells such as casparian strip, root cap, and idioblasts. We would like to discuss diversities of funtions, development and evolution of specialized organs and cells.
Dissection of the molecular mechanism of root hair morphogenesis in Arabidopsis.
Microtubule dynamics regulated by a plant-specific protein family, CORD
Transcriptional Atlas of Idioblast Myrosin Cells; A Factory for the Mustard Oil Bomb
Endodermal cell differentiation and apoplastic barrier formation
Regulatory mechanism of stem cell maintenance in Arabidopsis roots
Root cap morphogenesis and function in the immune system
Calcium ion mediated memory system in the carnivorous plant Dionaea muscipula
Invention and diversity of stomata in land plants
◆S06 Frontiers of research on embryo and endosperm development: Induction of artificial apomixis
Date: 13:45-16:45, March 19 (Thursday), 2020
Venue: Room Y
Organizers：Miho Ikeda (Saitama Univ.), Masaru Ohme-Takagi (Saitama Univ.)
Plant seeds consist of embryo and endosperm, and their developments are regulated by independent mechanisms. Elucidating the mechanisms of sporogenesis and development of embryo and endosperm will contribute to the establishment of the apomixis (producing clonal seeds without fertilization) artificial inducing system, which has been drastically progressed in these years. In this symposium, we invited five scientists who are expert for molecular mechanisms of sporogenesis, embryo and endosperm development and will present the latest research topics in these filed. We will discuss how to induce artificial apomixis based on the molecular mechanisms of embryo and endosperm develpoments. (This symposium supported by The Advanced Low Carbon Technology Research and Development Program (ALCA) and MEXT KAKENHI, Grant-in-Aid for Scientific Research on Innovative Areas, "Principle of Birth of New Plant Species")
Shedding light on sporogenesis in Arabidopsis
Initiation of zygotic development and fertilization-independent egg division in rice
Molecular mechanisms of endosperm initiation in flowering plants
Identification of the lifeline gateway within a plant ovule, required for transferring important substances to seeds.
Regulation mechanisms of nutrient supply necessary for embryogenesis
Role of imprinted genes in relation to sexual and asexual endosperm development in rice
◆S07 Secret life of chloroplasts: from development to degradation
Date: 13:45-16:45, March 19 (Thursday), 2020
Venue：Room Z
Organizers：Juntaro Negi (Kyushu Univ.), Yoshiki Nishimura (kyoto Univ.)
Chloroplasts, plant-specific organelles, possess unique DNA and are known to perform various functions such as photosynthesis and lipid synthesis. Researchers have been trying for more than a century to figure out how these chloroplasts develop, how they differentiate functionally in different tissues and how they are broken down, but these fundamental questions still remain unsolved. In this symposium, young researchers who are challenging these questions with new perspectives will share the latest progresses in the frontier of chloroplast research to highlight chloroplasts as an unique and attractive research subject.
Co-sponsored by New photosynthesis
The dynamic division cycle of chloroplast nucleoids
Chloroplast biogenesis starts with lipids
Protective response of photosynthesis
Chloroplast peptide exporter and organellar homeostasis
A new perspective on the mechanism of chloroplast development in guard cells
A novel regulation in chloroplast movements
Fate of chloroplasts: the degradation process by autophagy
Plastidology Begins: A new horizon for evolutionary biology after the flood of genome sequence information
◆S08 Frontiers of growth and development in grasses explored by young researchers
Date：8:45-11:45, March 20 (Friday), 2020
Venue：Room X
Organizers：Katsutoshi Tsuda (NIG), Wakana Tanaka (Hiroshima Univ.)
Grass species such as rice, wheat and barley are not only important as major crops but also useful as model plants to understand developmental mechanisms in diverse angiosperms. Elucidation of the regulatory mechanisms underlying grass development will contribute to both understanding of plant development and agricultural improvement. In this symposium, the speakers will present the latest research findings on grass development, covering regulation of meristem activity and elaboration of various organs such as leaves, internodes, roots, and inflorescences. We expect to exchange opinions on these topics together with researchers from various fields to gain a broad perspective on general regulatory mechanisms underlying plant development.
Post-translational regulation of a KNOX transcription factor in rice.
Functional analysis and genetic interaction among the genes involved in the plastochron regulation of rice
Antagonistic mechanism of internode elongation in rice
Genetic mechanism underlying axillary meristem formation in rice
Evolution of the homeobox genes controlling grain number in Triticeae
Environment-Dependent Root Developmental Processes Common in Various Poaceae Species
◆S09 Two sides of auxin actions on stem cells
Date：8:45-11:41, March 20 (Friday), 2020
Venue：Room Y
Organizer：Ryuichi Nishihama (Kyoto Univ.), Masaki Ishikawa (NIBB)
The phytohormone auxin functions in a plethora of developmental processes and regulates differentiation of cells, tissues and organs. In addition, as seen in the lateral root formation process, auxin acts in promoting stem cell formation. Despite a seemingly counterintuitive concept, a growing body of evidence is accumulating to demonstrate that low auxin-responsiveness plays critical roles in de novo formation and maintenance of stem cells. In this symposium, speakers introduce latest studies on either or both of two sides of auxin actions to stem cells. Chromatin regulation that enables them will be discussed as well. This symposium is sponsored by Grant-in-Aid for Scientific Research on Innovative Areas: Principles of pluripotent stem cells underlying plant vitality.
Two sides of auxin actions in lateral root formation
Ambivalence of auxin functions in floral meristem determinacy
Induction of Somatic Embryogenesis, Auxin and Transcription Factors
Spatio-temporal Regulation of Phytohormone during Tissue-reunion Process in Incised Plant Tissue.
Relationship between stem cell-ness and low auxin-responsiveness in Marchantia polymorpha
Role of auxin in stem cell formation in Physcomitrella patens
Maintenance of genome integrity through controlling chromatin structure
◆S10 Understanding plant developmental processes along spatiotemporal axes
Date：9:00-11:40 March 20 (Friday), 2020
Venue：Room Z
Organizer：Tatsuaki Goh (NAIST), Akane Kubota (NAIST)
Development of multicellular plants is controlled by the integration of individual cellular responses. Recent advances in single-cell technology have enabled us to perform detailed analyses of the cellular behaviors on gene expression, intracellular structural changes and cell deformation. It is, however, still unclear how these cellular behaviors are integrated to regulate multicellular development in plants. In this symposium, we will share recent researches to connect spatio-temporal cellular behaviors and macro-scale developmental processes. This symposium is sponsored by Grant-in-Aid for Scientific Research on Innovative Areas 'Periodicity and its Modulation in Plants'.
Periodic cellular behaviors during root cap maturation and detachment
Auxin-dependent root gravitropism in A. thaliana and its potential contribution to the local adaptation.
Distribution of two phospholipids specifies a dynamic plasma membrane domain for re-orientation of root hair tip growth
Morphology, dynamics, and function of unique membrane surrounding sperm plasma membrane.
Origination of the circadian clock system in stem cells regulates cell differentiation
Quantitative Live imaging of plant organogenesis
◆S11 Development and application of plant manipulation strategy: towards the design of optimized crop production
Date：13：00-16：00, March 20 (Friday), 2020
Venue：Room X
Organizer：Masanori Izumi (RIKEN), Ayako Yokoi (NARO), Kei Hiruma (NAIST)
Basic researches on plant physiology have found various biological phenomena underlying plant development, growth and survive. Such studies further allowed the researchers to develop translational researches to improve agricultural productivity or quality through the manipulation of plant biological phenomena. A typical technique for plant manipulation is a genetic modification, in which precise modification methods including genome editing and genetic breeding have emerged. Notably, the control of plant-associated microbiomes or the use of chemicals can manipulate plant biological phenomena without genetic modification. In the current symposium, the JST PREST researchers in the “Control of Field-Grown Plants Phenomena” program would show their researches to develop novel strategy for the control of plant phenomena with various types of plant manipulation techniques. We would like to discuss the future direction of such diverse strategies towards the design of optimized crop production.
Chloroplast degradation processes as a manipulation target to improve photosynthesis
Development of novel chemical tools for uncoupling of plant hormone bioactivities
Precise genome editing via homologous recombination in plants
Improving the photosynthetic rate under fluctuating light environment in rice (Oryza sativa L.)
Exploration of molecules involved in pollen-pistil recognition for upgrading breeding programs
Understanding mechanisms of plant growth promotion provided by a root-associated bacterial and fungal community
Are microbiomes controllable? Frontiers in science of interactions
◆S12 Dynamic photosynthetic responses to fluctuating light
Date：13:00-16:00, March 20 (Friday), 2020
Venue：Room Y
Organizer: Ichiro Terashima (The University of Tokyo)
Light fluctuates in natural environments. In high light, dissipation of excitation energy as heat by means of NPQ is essential for protection of chloroplasts. On the other hand, NPQ should be switched off promptly in low light and the H+ antiporter KEA3 contributes to the rapid pH decay and NPQ relaxation, particularly in the presence of far-red light. In this symposium, photosynthesis in the fluctuating light will be highlighted and the roles of NPQ and KEA3, effects of far-red light, atmospheric CO2 concentration, air humidity and soil salinity, and the mechanisms of PSI photoinhibition will be argued. Omics data showing vital acclimation to the fluctuating light will be also discussed. This symposium is co-sponsored by a MEXT Grant-in-Aid for Scientific Research on Innovative Areas ‘NEW PHOTOSYNTHESIS.’
NPQ: the mechanism and effectiveness
Feedback regulation of photosynthesis by thylakoid proton antiport
Roles of far-red light in efficient photosynthesis in fluctuating light
Evaluation of functional LHCI size and an interrelationship between LHCI and PSI photoinhibition in rice leaves
Dynamic photosynthesis and the environment: CO2 concentration, salinity and humidity
Dynamic adjustments of Arabidopsis leaf transcriptome and proteome during acclimation to fluctuating light
◆S13 New Trends in Plant Chemical Research by the Interconnection between Chemical Biology and Metabolite Chemistry.
Date: 13:00-16:00, March 20 (Friday), 2020
Venue: Room Z
Organizer: Takeshi Nakano (Kyoto Univ.), Masami Hirai (RIKEN)
As plants are photosynthesis organisms that can produce natural organic compounds by themselves, plants have been synthesizing approximately one million kinds of low molecular weight compounds for regulation of plant life. In these compounds, bioactive compounds that affected from out of plant cell itself have been analyzed by chemical biology and chemicals that were synthesized in plant cell itself have been analyzed by metabolomics.
These plant-based natural organic compounds and synthetic organic compounds will be connected and affected each other that is similar to ‘inter-connected through service’ of urban traffic system in many aspects of compounds itself, biosynthetic pathway, signaling and physiology.
In this symposium, by mixing of researchers who are standing on plant chemical biology and/or plant metabolic chemistry, biological significance of these plant organic compounds for the organism itself and grovel ecosystem will be discussed. Furthermore, new technology to contribute developments of sustainable society based on these chemical knowledge will also be explored.
Metabolomic And Molecular Genetic Approaches for Understanding of Plant Metabolic Physiology
Identifications of structures and functions of widely spreading acylspermidine
Molecular basis of metabolic and functional diversity of triterpenoid saponins in plants
Chemical biology toward to reveal the mechanisms of plant growth
Plant chemicals shape the rhizosphere
Construction of a reference to unknown metabolites for the discovery of unused plant-derived specialized metabolites
◆S14 Higher-order functions in plant endomembrane system
Date：8：45-11：35, March 21 (Saturday), 2020
Venue：Room Y
Organizer：Tomohiro Uemura (Ochanomizu University), Erika Isono (University of Konstanz)
The targeting of cellular proteins to various endomembrane compartments and the transport of proteins via the membrane trafficking pathway are essential for the proteins to fulfill their functions at the correct place and time. Plants are sessile organisms that are forced to flexibly and readily react to the surrounding environment, for which the endomembrnane system plays a key role. However, many of the underlying molecular mechanisms of this environmental response are yet to be fully understood. In this symposium, we would like to present the results of our current studies on plant endomembrane systems that are essential for environmental responses both at the cellular and organismal levels.
Biological significance of the ER morphogenesis in plants
A Golgi-released subpopulation of the TGN mediates constitutive and pathogen-inducible protein secretion in Arabidopsis
Organelle dynamics and membrane trafficking during spermatogenesis in Marchantia polymorpha
Cytoskeleton dynamics for polarized cell wall deposition
Endosomal transport processes and autophagy
Developmental regulation of plant development by TGN-localized trafficking components
Endomembrane system for polar localization and degradation of boric acid transport proteins
Ubiquitylation on membrane trafficking component involved in plant adaptation to environmental stresses
◆S15 From plant physiology to biotechnology
Date：8：45-11：45, March 21 (Saturday), 2020
Venue：Room Z
Organizer：Atsushi Okazawa (Osaka Pref. Univ.), Hiroyuki Kajiura (Osaka Univ.)
Plants have adopted the environment by synthesizing various kinds of secondary metabolites and biopolymers as survival measures. Some of these metabolites and biopolymers are essential for our modern society. Recently, plant breeding and transgene technologies have dramatically improved the protein expression together with deep understanding of environmental responses in plants. As a result, plants might become one of the efficient bioreactors for producing valuable products such as secondary metabolites, biopolymers, and proteins for human use. In this symposium, we focus on plant physiological functions acquired as their survival measures from a bioengineering point of view, introduce the basic and applied research aiming for implementation of plant bioengineering in the modern society, and discuss future perspectives.
UV-B response analysis of plants toward production of useful metabolites by LED
Utilization of cyanobacterial light-inducible switch for metabolic engineering
Elucidation of molecular mechanism of natural rubber biosynthesis offers a new perspective on next generation plant biotechnology
Elucidation of the accumulation mechanisms and the functions of plant-derived high molecular weight biopolymers.
Development of a high expression system for foreign genes based on knowledge obtained from translational state analysis of endogenous mRNA
◆ The 16th Database Workshop
Date: 13:45–16:45, March 19 (Thursday), 2020
Venue: Room B
Organizers: Kentaro Yano (Meiji Univ.), Shizuka Koshimizu (Meiji Univ.)
Through increasing omics data by using NGS, machine learning methods have been widely applied for researches in plant science. In this workshop, as well as the status of the web databases in plant science, we will introduce the principle of natural language processing, deep neural network to class the images, visualization of the explanations in neural network models, and how to use public cloud. Participants are requested to bring their own PC and make necessary setups in advanced to this workshop. We will announce necessary software shortly. Of course, listening to the lectures only is also welcomed.
Co-sponsored by "Determining principles in the birth of new plant species"
The 16th Database workshop: The current status of bio-databases in plant science
The algorithms and research applications of a deep learning method "Graph Neural Network" for graph data structures
Potential applicability of deep learning in plant science; novel interpretations on images and DNAs