Cacti yog ib pab pawg nthuav ntawm cov nroj tsuag uas muaj peev xwm tsis tsuas yog ciaj sia tab sis vam meej hauv qee qhov chaw hnyav tshaj plaws hauv ntiaj teb.Nyob hauv cov cheeb tsam arid thiab ib nrab arid, lawv tau tsim ib tug fascinating array ntawm adaptations kom lawv ciaj sia.
Ib qho kev hloov pauv zoo tshaj plaws ntawm cacti yog lawv lub peev xwm khaws dej.Lawv tuab, fleshy stems ua raws li cov dej reservoir, cia lawv tiv taus ntev drought.Cov stems no muaj peev xwm nthuav dav thiab cog lus raws li cov dej muaj hloov pauv, tso cai rau cov cactus khaws cov dej kom ntau li ntau tau thaum lub caij los nag thiab txuag cov dej noo thaum lub caij ntuj qhuav.Qhov kev hloov pauv no tsis tsuas yog pab kom cov cacti muaj sia nyob, tab sis kuj tseem muaj kev vam meej hauv cov chaw tsis muaj dej.
Hauv kev teb rau qhov kub siab ntawm lawv cov chaw nyob, cacti kuj tau tsim cov yam ntxwv tshwj xeeb.Lawv cov pob txha yog cov nplooj hloov kho tiag tiag uas pab tiv thaiv cov nroj tsuag los ntawm hnub ci ntau dhau thiab tiv thaiv dej los ntawm evaporation.Cov spines kuj deter herbivores los ntawm noj cacti vim lawv feem ntau ntse thiab prickly.Tsis tas li ntawd, qee cov cacti muaj cov waxy txheej txheej ntawm lawv cov stems hu ua cuticle uas ua raws li kev tiv thaiv kev tiv thaiv kev poob dej.
Cacti kuj tau hloov kho cov hauv paus tshwj xeeb kom hloov mus rau qhov chaw qhuav.Es tsis txhob ntev, branched keeb kwm feem ntau pom nyob rau hauv lwm yam nroj tsuag, lawv muaj ntiav, dav hauv paus system uas tso cai rau lawv sai sai nqus dej muaj, txawm me me.Cov hauv paus hniav no tseem tuaj yeem nqus dej sai sai thaum nws muaj, kom ntseeg tau cov dej kom zoo.
Lub peev xwm los yug me nyuam yog qhov tseem ceeb rau kev ciaj sia ntawm txhua hom, thiab cacti tau tsim cov txheej txheem tshwj xeeb los xyuas kom muaj kev loj hlob zoo hauv cov chaw nyob hnyav.Ntau lub cacti, xws li lub cim saguaro cactus, tso siab rau cov pollinators xws li puav, noog thiab kab rau cross-pollination.Lawv tsim cov paj zoo nkauj thiab nectar kom nyiam cov pollinators, kom ntseeg tau tias kev hloov ntawm paj ntoos los ntawm cov nroj tsuag mus rau tsob ntoo.Tsis tas li ntawd, cacti tau tsim lub peev xwm los yug me nyuam asexually los ntawm cov txheej txheem xws li kev faib thiab branching.Qhov kev muaj peev xwm no tso cai rau lawv ua kom thaj chaw sai sai thiab ua rau lawv muaj feem muaj sia nyob hauv qhov chaw nyuaj.
Nyob rau hauv tag nrho, cacti yog tiag tiag yoog mus rau arid ib puag ncig.Los ntawm lawv lub peev xwm khaws dej rau lawv cov txheej txheem photosynthetic tshwj xeeb, cov nroj tsuag no ua tiav cov cua sov thiab tsis muaj dej.Nrog rau lawv cov yam ntxwv tshwj xeeb ntawm lub cev thiab cov tswv yim physiological, cacti yog cov pov thawj ntawm txoj kev txawv tshaj plaw uas hloov tau thiab vam meej hauv cov xwm txheej hnyav tshaj plaws.
Post lub sij hawm: Nov-29-2023