Great morphologicaldifferencesexistamongfruitsandvegetables.Inthiscombinedexperimentaland
theoreticalstudy,wepredictpumpkinshapeevolutionandmaximumsizebasedontheirmaterial
properties.Usingtime-lapsephotographyandmeasurementscollectedbyvolunteerfarmers,weshow
that aspumpkinsgrow,theymorphfromsphericaltopancakeshapes,flatteningupto50%inheight-to-
width aspectratio.Bycompressingwholepumpkinsinmaterial-testingmachines,wefindthatthe
elasticresponseofthepumpkinisinsufficienttoaccountforthelargedeformationscharacteristicof
large pumpkins.Wehypothesizethatpumpkinflatteningiscausedbytheweightofthepumpkin
retardingitsnormalgrowthprocesses.Wetestthishypothesisusingamathematicalmodelthat
assumesplantgrowthisstimulatedinresponsetoatensileyieldstress.Weareabletopredictpumpkin
shapesconsistentwiththoseobserved.Theobservedgrowthplasticityallowsthefruittoredistribute
internalstresses,therebygrowingtoextremesizeswithoutbreaking.
Morphologicaldifferencesexistamongfruitsandvegetables ดีInthiscombinedexperimentalandtheoreticalstudy, wepredictpumpkinshapeevolutionandmaximumsizebasedontheirmaterialคุณสมบัติUsingtime-lapsephotographyandmeasurementscollectedbyvolunteerfarmers, weshowที่ aspumpkinsgrow, theymorphfromsphericaltopancakeshapes, flatteningupto50% inheight-ไป-ความกว้าง aspectratioBycompressingwholepumpkinsinmaterial-testingmachines, wefindthattheelasticresponseofthepumpkinisinsufficienttoaccountforthelargedeformationscharacteristicofฟักทองขนาดใหญ่WehypothesizethatpumpkinflatteningiscausedbytheweightofthepumpkinretardingitsnormalgrowthprocessesWetestthishypothesisusingamathematicalmodelthatassumesplantgrowthisstimulatedinresponsetoatensileyieldstressWeareabletopredictpumpkinshapesconsistentwiththoseobservedTheobservedgrowthplasticityallowsthefruittoredistributeinternalstresses, therebygrowingtoextremesizeswithoutbreaking
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