Introduction-to-Horticulture-园艺学介绍
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Introduction-to-Horticulture-园艺学介绍
IntrotoHorticulture,partsoftheplantandtheirunctions,originalbyryantaltonmodifidbygeorgiagriculumofficeJune 2004 functionsofl 1.criticalforphotosynthesis (theprocessbywhichplantsproducttheirood ) 2.aidintheprocessoftpronicationwhichisnecessageryinorderforplantstocoolthemseles .4.Sometimes, leavescanbeuseddinasexualorvegetativepropagation .3.leavescanstoresomefoodwhichanlaterbetransferretotherareasoftheplant . exernalleafstructurures leavesareconsistfpetioleandbladesiscomprisedofveinsandamidrithevisinsoftheleafformitsstructuralframework axysubstancecoverstheeavesandsstemswarrooflayerthatkeepswaringplants, prinpancitilitisuesoftheleaf epidermis (cont ) sotmataoopeningsintheepidermismainlylocatedonundersideofleavesexchangefgases guardcellstwocellslocatedoneachsideofstomataopenand Chloroplast, celsinsthecenterofleafthechloroplasticcontactinschrophyllwhichgiveseplantsthegrincollormatufacturesfoodfoortheplantthoughphotor foodchainingforallivingthings,Photosynthesis, foodmanfacturedbythisprocesgodsowntotherootsthoughtthest.itisetherusedytheplantorsstoredasastarch sugar,orprotein, carbondioxidewaterlightenergy=glucose oxygen,Respiration,plantsresponire 24 hours/dayjustasissinsprosssstesheyconsumeroxygenandging twomainfunctionsthemoviementoftmaterials-water,minerals,foodsupporttheleavesandrectriverscrurturesscandeverscaturescanbeusedff 1 ) woo dystem :树、shrubs、woody perennials2) grass stem : holloworfilled3) herbaceous stem : likewoodybutsofter (clover、alfar 修改的stem :类型修改的stems, bulbs : (onion ) tubers : (potato ) stolo ns : above ground runner (strawberry ) rhizomes : belowgroundrunners (fieldbindweedorcress ) terminalbudtriestomakeplantgrowtallerorlongerifweremoveterminalbud、theplantwillbesheranthikeryouthinkofwhywewouldwanttodothis whatkindofplantscouldwedothison? InternalStemStructure、whatdoesthexylemcarrywateranminralstravelup、abouthephloemanufacturedfoldvelswowntheplantwhatdoesthe separatesthexylemandthephloevemthin,green,activeelygrowningissuelocatedbetweenthebarkandthewoodofaplants,whatisthedifferencein 、 dicotstemmaycontinuetoincreasindiameterbecausecambiumbuidsnewploemcellsontheutsidennewxylemcellsontheinsideex.treesmonocothave ainbothxylemandphloemandnocambiumthiswuldmaketmorelimitedinsizeex.corn,Whyshouldwecare? thestemsofsomesoplantsuseasfofoodirishotatoandasparagusothersareusedinbuildingmatrials, roots roustsfunctionancentheprationandcontitiontheprativatervandmenralfromthessoirdecondthemttothetthestorestore ome plants,光纤fibrousrootsystemmucheasiertotransplantmorespreadoutprototsystemlongerfererotsendofrootcontainsmanyroothairs functionsoffruit 33 1.protetheseedsinsidetheripenedovule (fruit ).2.provintritistetothesoilanddanewlygermatedseedling.3.aidinthedissemination/spreaddingofseedbyproidingfoodforanials .animalseatthefruitandseeds.afthefruitisdigested theseeddsoutintheanimalsfecesatano 4.Someplantshavedry,dehiscentfruitswhichsplittopentodissenseeds .whatisthepurpoposeeoffseeeds .tocontinuetherplantprocessthere