Wood Utilization LaboratoryYoshihiroHOSOOAssociateProfessor,Ph.D.・Tree Molecular Biology・Tree Histology & Cytology・Wood Anatomy・Wood PropertyActivitiesoftreesconstitutingforestsatthewhole-treelevelarecloselylinkedtotheiractivitiesatthecellularandmolecularlevels.Ourlaboratoryarestudyingthemechanismsoflifeactivitiesoftrees,includingpotassiummembranetransport,woodformation,andwoodproperties,usingvariousapproachesinvolvingthefieldssuchascellbiologyandmolecularbiology.Thesestudiesareexpectedtocontributetothedevelopmentoftreesthatgrowrapidly,withexcellentwoodqualityandhighenvironmentalstresstolerance,toproduceusablewoodmaterialsthatwillhelptoimproveandpreservetheenvironment.Wearemainlyconductingthefollowingresearches:(1)PotassiummembranetransportintreesPotassiumion(K+)isthemostabundantcationinplantcellsandplaysacentralroleinmanyaspectsofplantphysiology.Thetransport(uptakeorefflux)ofK+acrossbiologicalmembranesofthecellismediatedbymembranetransportproteins.WearestudyinggenesencodingK+membranetransportproteinsintrees.WeisolatedageneencodingK+membranetransportproteinfromaconiferforthefirsttimeintheworldandclarifieditsproperties.Weareanalyzingsamplescollectedfromtreesgrowninthefieldandsaplingsgrowningrowthchambersusingvarioustechniques.(2)WoodcellwallformationintreesWoodbiomassisthemostabundantbiomassontheearth.Themostfundamentalconstituentofthewoodinatreeisthehighlydevelopedcellwallformedbyxylemcells.Wearestudyingthemechanismofxylemcellwallformationusingcellbiologicalandmolecularapproaches.Predicted membrane topology of K+membrane transport protein (CjKUP1) in sugi (Cryptomeria jaopnica)CjKUP1 functions in K+uptake across the membranemembraneNCextracellularintracellularEnvironmental Symbiosis Science DivisionLaboratory of Risk ManagementKanaKAMIMURAAssistantProfessor,Ph.D.Keywords:WinddamageStorm/HurricaneForestmanagementMechanisticmodelsGametheoryStatisticalanalysisDuetoclimatechangeandthecurrentconditionofplantedforests,weexpectthatthedamageinforestswillincreaseinthefuture.Tofindthestrategiestomitigatedamageoccurrence,wehaveconductedfieldexperimentsandtemporal/spatialdataanalysistounderstandthemechanismofdamageoccurrence.Inparticular,winddamagecausedbystrongstorms(typhoons)iscurrentlyfocusedintermsofbiological,meteorological,andmechanisticperspectives.Thefinalgoaloftheresearchistoprovidemanagementstrategiesindecision-makingprocessbyforestownersinordertoachievesustainableforestresources.1. Mechanical interactions between treesThis research is aimed to understand how trees mechanically interact during storms/typhoons. ABCDABCDamage in forests in Toyama caused by a typhoon in 2004 (left) and snow and wind damage in Basque, Spain (right)Estimation of forest damage using aerial photos2. Agent-based modeling of damage propagation Damage propagation in forests caused by strong wind has been simulated using agent-based modeling approach coupling with the theories of boundary-layer and silviculture. 3. Forest damage caused by tropical and extra-tropical cyclonesForest damage due to strong wind and heavy raining from tropical and extra-tropical cyclones has been statistically analyzed at regional and county level in order to find the spatial/temporal tendency of damage occurrence.After storm…DAMAGE!BeforeWINDEnvironmental Symbiosis Science Division22
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