?Tree Molecular Biology?Tree Histology & Cytology?Wood Anatomy?Wood PropertyNCACABDBextracellularmembraneintracellularEnvironmental Symbiosis Science DivisionEnvironmental Symbiosis Science DivisionWood Utilization LaboratoryLaboratory of Risk ManagementYoshihiroHOSOOAssociateProfessor,Ph.D.KanaKAMIMURAAssociateProfessor,Ph.D.Keywords:?Winddamage?Storm/Hurricane?Forestmanagement?Mechanisticmodels?Gametheory?StatisticalanalysisActivitiesoftreesconstitutingforestsatthewhole-treelevelarecloselylinkedtotheiractivitiesatthecellularandmolecularlevels.Ourlaboratoryarestudyingthemechanismsoflifeactivitiesoftrees,includingpotassiummembranetransport,woodformation,andwoodproperties,usingvariousapproachesinvolvingthefieldssuchascellbiologyandmolecularbiology.Thesestudiesareexpectedtocontributetothedevelopmentoftreesthatgrowrapidly,withexcellentwoodqualityandhighenvironmentalstresstolerance,toproduceusablewoodmaterialsthatwillhelptoimproveandpreservetheenvironment.Duetoclimatechangeandthecurrentconditionofplantedforests,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. 2. 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.Wearemainlyconductingthefollowingresearches:(1)PotassiummembranetransportintreesPotassiumion(K+)isthemostabundantcationinplantcellsandplaysacentralroleinmanyaspectsofplantphysiology.Thetransport(uptakeorefflux)ofK+acrossbiologicalmembranesofismediatedbymembranetransportproteins.WearestudyinggenesencodingK+membranetransportproteinsintrees.(2)WoodcellwallformationintreesWoodbiomassisthemostabundantbiomassontheearth.Themostfundamentalconstituentofthewoodinatreeisthehighlydevelopedcellwallformedbyxylemcells.Wearestudyingthemechanismofxylemcellwallformationusingcellbiologicalandmolecularapproaches.thecellWIND21WeisolatedageneencodingK+membranetransportproteinfromaconiferforthefirsttimeintheworldandclarifieditsproperties.Weareanalyzingsamplescollectedfromtreesgrowninthefieldandsaplingsgrowningrowthchambersusingvarioustechniques.Damage 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 photosPredicted membrane topology of K+membrane transport protein (CjKUP1) in sugi (Cryptomeria jaopnica)CjKUP1 functions in K+uptake across the membraneBeforeAfter storm…CDAMAGE!
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