Qhov sib txawv tseem ceeb ntawm amphicribral thiab amphivasal yog tias nyob rau hauv kev npaj amphicribral, phloem encircles lub xylem thaum nyob rau hauv ib qho amphivasal npaj, xylem encircles phloem.
Cov ntaub so ntswg vascular yog cov ntsiab lus ntawm cov nroj tsuag vascular. Muaj ob yam tseem ceeb ntawm kev coj ua raws li xylem thiab phloem. Xylem yog lub luag haujlwm rau kev ua dej thiab cov zaub mov thaum phloem yog lub luag haujlwm rau kev thauj khoom noj / carbohydrates thoob plaws hauv cov nroj tsuag. Feem ntau, nyob rau hauv stems thiab keeb kwm, xylem thiab phloem pom ua ke nyob rau hauv vascular bundles. Raws li kev npaj ntawm xylem thiab phloem hauv vascular bundles, muaj plaub hom vascular bundles: bicollateral, amphicribral thiab amphivasal. Nyob rau hauv kev npaj amphicribral, xylem yog surrounded los ntawm ib lub nplhaib ntawm phloem thaum nyob rau hauv amphivasal kev npaj, phloem yog surrounded los ntawm ib lub nplhaib ntawm xylem.
Amphicribral (Hadrocentric Bundle) yog dab tsi?
Amphicribral arrangement yog ib qho ntawm plaub hom xylem thiab phloem kev npaj hauv vascular bundles. Hauv kev npaj amphicribral, xylem yog surrounded los ntawm ib lub nplhaib ntawm phloem. Nyob rau hauv lwm yam lus, phloem encircles lub strand ntawm xylem. Hom kab mob vascular no tseem hu ua hadrocentric bundle. Qhov tseeb, nws yog ib hom concentric vascular bundles.
Daim duab 01: Amphicribral vs Amphivasal
Ntxiv mus, kev npaj amphicribral yog kaw vascular system vim tias tsis muaj cambium nyob nruab nrab ntawm xylem thiab phloem. Selaginella yog ib tsob nroj uas muaj amphicribral vascular bundle.
Amphivasal (Leptocentric Bundle) yog dab tsi?
Amphivasal kev npaj yog kev npaj vascular bundle uas lub phloem nyob ib puag ncig ntawm lub nplhaib ntawm xylem. Nyob rau hauv lwm yam lus, xylem encircles lub central strand ntawm phloem nyob rau hauv amphivasal npaj. Qhov kev npaj no tseem hu ua leptocentric bundle.
Daim duab 02: Amphivasal Vascular Bundle hauv Acorus Rhizome
Zoo ib yam li kev npaj amphicribral, kev npaj amphivasal kuj yog kaw kaw tsis muaj cambium. Dracaena thiab Yucca, Begonia thiab Rumex yog cov nroj tsuag uas muaj amphivasal npaj.
Dab tsi zoo sib xws ntawm Amphicribral thiab Amphivasal?
- Amphicribral thiab amphivasal npaj yog ob hom concentric vascular bundles.
- Nyob rau hauv ob hom no, ib hom vascular cov ntaub so ntswg puag ncig lwm hom vascular ntaub so ntswg.
- Ob hom yog kaw vascular bundles.
- Tsis muaj cambium ntawm xylem thiab phloem hauv ob hom.
- Ntxiv mus, lawv yog cov kab mob sib txuas ua ke.
Qhov txawv ntawm Amphicribral thiab Amphivasal yog dab tsi?
Amphicribral vascular system muaj lub hauv paus strand ntawm xylem uas nyob ib puag ncig los ntawm lub nplhaib ntawm phloem. Nyob rau hauv sib piv, amphivasal vascular system muaj ib tug central strand ntawm phloem uas yog surrounded los ntawm ib lub nplhaib ntawm xylem. Yog li, phloem puag ncig xylem hauv amphicribral kev npaj thaum xylem ncig phloem hauv amphivasal pob. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm amphicribral thiab amphivasal. Hadrocentric bundle yog ib lub ntsiab lus ntawm amphicribral thaum leptocentric bundle yog ib lub ntsiab lus ntawm amphivasal.
Cov infographic hauv qab no nthuav tawm ntau qhov kev sib piv ntsig txog qhov sib txawv ntawm amphicribral thiab amphivasal.
Summary – Amphicribral vs Amphivasal
Amphicribral thiab amphivasal yog ob hom kev sib txuam ntawm cov hlab ntsha. Hauv ob hom, ib hom vascular cov ntaub so ntswg encircles rau lwm hom vascular ntaub so ntswg. Ntxiv mus, lawv raug kaw vascular pob uas tsis muaj cambium. Amphicribral vascular bundle yog ib lub vascular pob nyob rau hauv uas phloem encircles lub hauv paus strand ntawm xylem. Nyob rau hauv sib piv, amphivasal vascular pob yog ib vascular pob nyob rau hauv uas xylem encircles lub central strand ntawm phloem. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm amphicribral thiab amphivasal.
