Qhov sib txawv tseem ceeb ntawm cov hauv paus thiab tua apical meristem yog tias cov hauv paus apical meristem yog thaj chaw me me ntawm qhov kawg ntawm cov hauv paus hniav uas muaj cov hlwb uas muaj peev xwm sib faib thiab ua rau cov hauv paus hauv paus ntaub so ntswg thaum tua apical meristem yog ib cheeb tsam ntawm qhov kawg ntawm tag nrho cov ceg thiab stems uas muaj cov hlwb sai sai faib thiab ua rau cov kab mob xws li nplooj thiab paj.
Nroj tsuag tseem loj hlob thiab loj hlob thoob plaws hauv lawv lub neej. Apical meristem yog thaj tsam ntawm cov hlwb uas muaj peev xwm faib thiab loj hlob. Apical meristems yog lub luag haujlwm rau kev txuas ntxiv ntawm cov hauv paus hniav thiab tua. Cov hlwb ntawm apical meristem yog me thiab kheej kheej nyob rau hauv cov duab. Cov hlwb no sai sai faib los ntawm mitosis ua ntej sib txawv rau hauv ib hom cell. Muaj ob hom apical meristems hauv cov nroj tsuag: hauv paus apical meristem thiab tua apical meristem. Lawv feem ntau pom nyob rau hauv cov hauv paus hniav thiab tua cov lus qhia. Hauv paus apical meristem muab cov hlwb rau cov hauv paus hniav tshiab. Tua apical meristem tsim nplooj thiab paj, thiab lwm yam.
Root Apical Meristem yog dab tsi?
Root apical meristem yog thaj chaw me me ntawm qhov kawg ntawm cov hauv paus hniav uas nquag loj hlob. Nws muaj cov hlwb uas tau faib sai sai thiab muab cov hlwb tshiab rau cov hauv paus hniav yav tom ntej. Hauv paus apical meristem yog khob-zoo li tus, thiab nws muaj kev tiv thaiv los ntawm lub hauv paus cap. Cells tau txuas ntxiv sloughed tawm sab nrauv ntawm lub hauv paus cap.
Daim duab 01: Hauv paus Apical Meristem
Root apical meristem yog ib cheeb tsam luv uas qhia pom qhov zoo ntawm geotropism. Nws muaj qhov chaw tsis muaj zog hu ua quiescent centre. Lub chaw quiescent tswj cov kab mob nyob ib puag ncig los ntawm kev tiv thaiv lawv qhov sib txawv. Nws kuj tseem tuaj yeem ua raws li lub pas dej ntawm cov qia hlwb kom rov ua kom cov hlwb ploj lossis puas lawm.
Yam tua Apical Meristem yog dab tsi?
Tua apical meristem yog thaj tsam ntawm qhov kawg ntawm txhua ceg thiab stems ntawm cov nroj tsuag siab dua. Nws muaj qhov sib faib sai sai thiab tsis txawv txav. Tua apical meristem yog davhlau ya nyob twg, thiab nws yog tiv thaiv los ntawm ib tug crown ntawm cov tub ntxhais hluas nplooj. Nws yog dome-puab thiab muaj nplooj primordia.
Daim duab 02: Tua Apical Meristem
Ntxiv mus, tua apical meristem ua rau cov kab mob xws li nplooj, buds tshiab thiab paj. Yog li ntawd, tua apical meristems yog cov chaw uas tsim thawj lub cev cog.
Dab tsi yog qhov zoo sib xws ntawm cag thiab tua Apical Meristem?
- Caum thiab tua apical meristems muaj nyob ntawm cov lus qhia lossis loj hlob apex ntawm cov hauv paus hniav thiab tua hauv cov nroj tsuag, ntsig txog.
- Lawv yog cov ntaub so ntswg tseem ceeb.
- Lub hlwb ntawm tua thiab hauv paus apical meristems faib nrawm.
- Ntxiv mus, lawv yog cov hlwb uas tsis paub meej lossis tsis txawv txav.
Dab tsi yog qhov txawv ntawm cag thiab tua Apical Meristem?
Qhov sib txawv tseem ceeb ntawm cov hauv paus thiab tua apical meristem yog cov hauv paus apical meristem muab cov hlwb meristematic rau yav tom ntej hauv paus kev loj hlob thaum tua apical meristem ua rau cov kab mob xws li nplooj thiab paj, thiab lwm yam. Tsis tas li ntawd, lub hauv paus apical meristem yog qhov zoo geotropic thaum tua apical meristem yog qhov zoo phototrophic. Ntxiv mus, muaj qhov chaw quiescent hauv paus apical meristem thaum tua apical meristem tsis muaj qhov chaw no.
Cov hauv qab no infographic tabulates qhov sib txawv ntawm cov hauv paus hniav thiab tua apical meristem kom ntxaws ntxiv.
Summary – Root vs Tua Apical Meristem
Hauv cov nroj tsuag, thaj av apex ntawm cov hauv paus hniav muaj cov hauv paus apical meristem thaum apex cheeb tsam ntawm cov tua tau tua apical meristem. Apical meristems yog cov cheeb tsam tsim los ntawm kev sib faib sai thiab tsis paub meej lossis tsis txawv txav. Hauv paus apical meristem hlwb faib mitotically thiab muab cov hlwb rau cov hauv paus hniav tshiab. Tua apical meristem hlwb faib thiab tsim cov kabmob xws li paj thiab nplooj. Hauv paus apical meristem qhia pom qhov zoo geotropism thiab tsis zoo phototropism. Tua apical meristem qhia tau hais tias zoo phototropism thiab tsis zoo geotropism. Cov nplooj ntawm cov tub ntxhais hluas nplooj tiv thaiv tua apical meristem thaum lub hauv paus cap tiv thaiv lub hauv paus apical meristem. Yog li, qhov no qhia txog qhov sib txawv ntawm cov hauv paus hniav thiab tua apical meristem.
