I-Cacti iyizitshalo ezihlukile futhi ezihehayo eziye zavela ukuze ziphile kwezinye zezindawo ezinokhahlo nezome kakhulu eMhlabeni.Lezi zitshalo ezihlabayo zinekhono elimangalisayo lokumelana nezimo zesomiso ezidlulele, zizenze zibe yisakhiwo sodumo futhi zithandeke.Kulesi sihloko, sizongena emhlabeni we-cacti futhi sihlole ukuthi kungani bengabulawa ukoma.
Esinye sezici ezihluke kakhulu ze-cacti yiziqu zabo ezinomsoco.Ngokungafani nezitshalo eziningi ezithembele emaqabunga azo ukuze uthole i-photosynthesis, i-cacti iye yavela ukuze igcine amanzi eziqwini zayo eziqinile neziyinyama.Lezi ziqu zisebenza njengamadamu, okuvumela i-cacti ukuthi igcine amanzi amaningi ngezikhathi zemvula noma umswakama ophezulu.Lolu hlelo olwakhelwe ngaphakathi lokugcina amanzi lwenza i-cacti ikwazi ukuqhubeka nesomiso isikhathi eside, njengoba ikwazi ukungena kulezi zindawo lapho amanzi eyindlala.
Ngaphezu kwalokho, i-cacti iguqule amaqabunga awo ukuze inciphise ukulahlekelwa kwamanzi.Ngokungafani nezakhiwo ezibanzi nezinamaqabunga ezitholakala ezitshalweni eziningi, i-cacti iye yakha amaqabunga aguquliwe abizwa ngokuthi ama-spines.Le migogodla inezinjongo eziningi, enye yazo ukunciphisa ukulahlekelwa kwamanzi ngokuphefumula.Ngokuba nezindawo ezingaphezulu nezincane ezivezwe emkhathini, i-cacti ingakwazi ukonga amanzi alinganiselwe enawo.
Ngokungeziwe emandleni abo okugcina amanzi amangalisayo, i-cacti iphinde yathuthukisa ukujwayela okuyingqayizivele komzimba kanye ne-anatomical ukuze iphile ezimeni ezomile.Isibonelo, i-cacti inezicubu ezikhethekile ezibizwa nge-CAM (Crassulacean Acid Metabolism) ezivumela ukuthi zenze i-photosynthesis ebusuku, lapho izinga lokushisa lipholile futhi ingozi yokulahlekelwa kwamanzi ngenxa yokuhwamuka iphansi.Le photosynthesis yasebusuku isiza i-cacti ukuthi ilondoloze amanzi phakathi nosuku, lapho ilanga elishisayo lingawaqeda ngokushesha amanzi awo.
Ngaphezu kwalokho, i-cacti inohlelo lwezimpande olungajulile futhi olusabalele olulwenza lukwazi ukumunca ngokushesha noma yimuphi umswakama otholakala enhlabathini.Lezi zimpande ezingajulile zisakazeka ngokuvundlile kunokuba zijule, okuvumela izitshalo ukuba zibambe amanzi endaweni enkulu.Lokhu kujwayela kuvumela i-cacti ukuthi isebenzise ngokugcwele ngisho nemvula encane noma amazolo, okukhuphula amanzi kakhulu.
Kuyathakazelisa ukuthi ama-cacti nawo angongcweti ekwehliseni ukulahlekelwa kwawo wonke amanzi ngenqubo ebizwa nge-crassulacean acid metabolism.Izitshalo ze-CAM, njenge-cacti, zivula i-stomata yazo ebusuku ukuze zithwebule i-carbon dioxide, zinciphise ukulahlekelwa kwamanzi phakathi nezingxenye ezishisa kakhulu zosuku.
Sengiphetha, i-cacti iguqule inqwaba yokujwayela okuyenza iphumelele ezindaweni ezomile futhi igweme ukoma.Iziqu zabo ezinoshukela zigcina izindawo zokugcina amanzi, amaqabunga awo ashintshiwe anciphisa ukulahlekelwa kwamanzi, i-photosynthesis yawo ye-CAM ivumela ukubamba i-carbon dioxide ebusuku, futhi izimpande zazo ezingajulile zandisa ukumuncwa kwamanzi.Lokhu kuzivumelanisa nezimo okuphawulekayo kubonisa ukukhuthazela nempilo yemvelo ye-cacti, okuwenza abe ompetha bangempela bokubekezelela isomiso.Ngokuzayo lapho uhlangana ne-cactus ogwadule, thatha isikhashana ukwazisa ukujwayela okumangalisayo okuyivumela ukuthi ibekezele futhi ichume endaweni ebonakala ingenamoya.
Isikhathi sokuthumela: Aug-31-2023