Qhov sib txawv tseem ceeb ntawm tracheids thiab cov hlab ntsha yog tias cov tracheids tsis muaj daim hlau kawg thaum cov hlab ntsha muaj cov phaj kawg.
Division Tracheophyta yog ib pawg nroj tsuag uas muaj cov nroj tsuag vascular. Vascular nroj tsuag muaj ib tug zoo tsim vascular system thauj cov as-ham, dej thiab minerals thoob plaws hauv lub cev. Feem ntau cov nroj tsuag muaj ob hom vascular cov ntaub so ntswg uas yog xylem thiab phloem. Cov ntaub so ntswg ua haujlwm ua cov ntaub so ntswg, ua haujlwm raws li lub raj xa dej thiab lwm yam khoom noj los ntawm cov hauv paus hniav mus rau nplooj. Yog li ntawd, xylem thiab phloem pib los ntawm nplooj thiab txuas mus rau cov hauv paus hniav.
Txawm li cas los xij, xylem thiab phloem txawv ntawm ib leeg thiab ua haujlwm; xylem cov ntaub so ntswg thauj dej thiab lwm yam minerals los ntawm cov hauv paus hniav mus rau nplooj. Ntawm qhov tod tes, phloem thauj khoom noj los ntawm nplooj mus rau cov hauv paus hniav thiab lwm qhov chaw ntawm cov nroj tsuag. Tsis tas li ntawd, ob leeg xylem thiab phloem muaj ntau hom cell. Ntawm cov cell hom ntawm xylem, tracheids thiab hlab ntsha yog ob yam tseem ceeb ntawm tes. Tracheids yog elongated nqaim hlwb thaum cov hlab ntsha yog elongated cylindrical wider hlwb.
Dab tsi yog Tracheids?
Tracheids yog cov elongated raj zoo li cov hlwb uas thauj dej thiab cov zaub mov los ntawm cov hauv paus hniav mus rau nplooj hauv txhua cov nroj tsuag vascular. Lawv yog hom tshwj xeeb ntawm cov hlwb hauv cov ntaub so ntswg xylem. Cov kev hu no muaj qhov xaus. Tsis tas li ntawd, lawv muaj qhov nqaim lumen. Tsis tas li ntawd, tracheids yog cov hlwb nyias, tab sis lawv muaj cov phab ntsa tuab heev, lignified cell phab ntsa. Thaum paub tab, protoplasts ploj ntawm tracheids; yog li ntawd, lawv dhau los ua hlwb tsis muaj sia.
Daim duab 01: Tracheid
Tsis tas li ntawd, tracheids yog qhov tseem ceeb tshaj plaws rau cov hlab ntsha uas yog yam ntxwv ntawm angiosperms. Tsis zoo li cov hlab ntsha, tracheids tsis muaj daim hlau kawg. Tsis tas li ntawd, lawv yog cov hlwb imperforated. Lwm yam tshaj li kev thauj mus los ntawm dej thiab cov zaub mov, tracheids muab kev txhawb nqa rau cov nroj tsuag ib yam nkaus.
Nkoj yog dab tsi?
Vessels yog hom tshwj xeeb thiab qib siab ntawm cov tshuaj angiosperms uas ua dej thiab cov zaub mov hauv cov nroj tsuag. Lawv yog cov dav thiab cylindrical nyob rau hauv cov duab. Tsis tas li ntawd, lawv npaj ib qho ntawm lwm qhov kawg kom kawg zam thiab ua lub raj zoo li cov qauv thauj dej kom zoo. Lawv muaj perforated kawg daim hlau.
Daim duab 02: Vessels
Tsis tas li, lawv muaj qhov dav dua. Piv nrog rau tracheids, lawv cov phab ntsa ntawm tes yog tsawg dua thickened. Zoo ib yam li tracheids, thaum paub tab, lawv dhau los ua cov hlwb tsis muaj sia thiab lawv cov protoplasts ploj ntawm cov hlwb.
Dab tsi zoo sib xws ntawm Tracheids thiab Vessels?
- Tracheids thiab hlab ntsha yog ob hom ntawm tes ntawm xylem.
- Ob leeg yog cov hlwb tsis muaj sia tsim los ua dej thiab cov zaub mov hauv cov nroj tsuag.
- Tsis tas li, ob leeg muaj cov phab ntsa tuab tuab heev.
- Tsis tas li ntawd, ob qho tib si yog lub raj zoo li lub hlwb elongated.
- Lawv ua ke ua cov ntsiab lus tracheary.
- Ob leeg tracheids thiab hlab ntsha yog cov hlwb tshwj xeeb heev.
- Lawv devoid protoplast thaum lawv loj tuaj.
- Ob lub tracheids thiab nkoj muab kev txhawb nqa rau cov nroj tsuag.
Qhov txawv ntawm Tracheids thiab Vessels yog dab tsi?
Ib qho tseem ceeb sib txawv ntawm tracheids thiab nkoj yog tias tracheids muaj peev xwm khaws tau dej raws li lawv tuaj yeem tiv taus lub ntiajteb txawj nqus thaum cov hlab ntsha tsis tuaj yeem. Qhov no yog vim lawv (tracheids) tshwm sim kom muaj qhov chaw siab dua rau qhov sib piv dua li cov hlab ntsha. Tsis tas li ntawd, trachieds tsis muaj perforated kawg daim hlau thaum cov hlab ntsha muaj perforated kawg daim hlau. Qhov no yog qhov sib txawv loj ntawm trachied thiab nkoj.
Y Thaum Tracheids pom nyob rau hauv txhua cov nroj tsuag vascular, cov hlab ntsha yog cov yam ntxwv ntawm angiosperms. Ntxiv mus, Tracheids yog tib lub hlwb nrog qhib rau ntawm ob qho kawg (yog li tsis hu ua syncytes), thaum cov hlab ntsha tsim los ntawm kev koom nrog ntau lub hlwb hauv kev sib txawv (yog li yog syncytes). Yog li nws yog qhov sib txawv ntawm tracheids thiab cov hlab ntsha.
Summary – Tracheids vs Vessels
Ob lub tracheids thiab cov hlab ntsha yog lub luag haujlwm rau kev thauj mus los ntawm cov dej thiab cov ntxhia hauv cov dej hauv lub cev. Ntxiv mus, lawv yog xylem ntsiab. Tab sis tracheids thiab cov hlab ntsha txawv ntawm ib leeg los ntawm qee yam nta. Tracheids yog elongated, nyias, zoo li cov hlab ntsha uas muaj nyob rau hauv tag nrho cov vascular nroj tsuag los ua dej. Ntawm qhov tod tes, cov hlab ntsha yog elongate, cylindrical, wider, raj zoo li cov hlwb tam sim no tsuas yog nyob rau hauv angiosperms.
Tsis tas li ntawd, tracheids yog cov hlwb imperforated thaum cov hlab ntsha yog perforated hlwb. Tracheids muaj lub lumen nqaim thaum cov hlab ntsha muaj lub lumen dav dua. Txawm li cas los xij, cov phab ntsa ntawm tes ntawm tracheids yog tuab dua li cov phab ntsa ntawm cov hlab ntsha. Qhov tseem ceeb tshaj plaws, cov hlab ntsha muaj perforated kawg daim hlau thaum tracheids tsis muaj daim hlau kawg. Tag nrho cov lus qhia saum toj no qhia txog qhov sib txawv ntawm tracheids thiab cov hlab ntsha.
