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 theseeddsouti