Qhov Tseem Ceeb Qhov txawv - Reticulate vs Parallel Venation
Cov leeg yog pom muaj nyob hauv nplooj uas muab cov yam ntxwv sib txawv rau cov nplooj. Lawv muab txhua yam kev txhawb nqa rau nplooj. Lawv koom nrog hauv kev thauj mus los ntawm dej thiab zaub mov hauv thiab tawm ntawm nplooj los ntawm xylem thiab phloem hlwb uas muaj nyob rau hauv nplooj mesophyll feem. Qhov no muab cov dej txaus rau hauv nplooj thiab tseem hloov cov khoom noj uas tsim los ntawm photosynthesis mus rau hauv seem ntawm cov nroj tsuag lub cev. Raws li hom qauv lawv npaj, cov hlab ntsha tuaj yeem muab faib ua ob hom, reticulate venation, thiab parallel venation. Nyob rau hauv reticulate venation, veins tsim ib tug net-zoo li qauv uas muaj nyob rau ntawm ob sab ntawm lub midrib whereas, i n parallel venation, veins yog parallel rau ib leeg los ntawm petioles mus rau qhov kawg ntawm nplooj (nplooj nplooj). Qhov no yog qhov sib txawv tseem ceeb ntawm reticulate venation thiab parallel venation.
Reticulate Venation yog dab tsi?
Reticulate ventation ntawm nplooj muaj ib tug txawv cov hlab ntsha uas nkag los ntawm nplooj ntoos petiole thiab khiav los ntawm qhov chaw ntawm nplooj. Thawj cov hlab ntsha los yog cov midrib txuas cov nplooj. Cov midrib muaj ntau cov ceg ntoo uas ua rau cov leeg me me. Cov hlab ntsha thib ob txuas los ntawm midrib mus rau cov npoo ntawm nplooj. Qhov txuas ntxiv ntawm cov hlab ntsha thib ob no xaus ntawm cov qauv tshwj xeeb tam sim no nyob rau hauv nplooj ntawv. Qhov no yog hu ua hydathodes. Hydathodes yog hloov qhov pores thiab ua raws li lub cev secretory. Cov hlab ntsha thib ob kuj tseem tsim cov qauv txuas ntxiv uas ua rau muaj kev loj hlob ntawm cov hlab ntsha tertiary lossis thib peb cov leeg. Cov qauv no ntawm cov hlab ntsha tertiary tsim cov qauv reticulate hauv nplooj. Areoles yog cov qauv uas muaj nyob rau hauv mesophyll ntawm tertiary leeg. Qee cov veinlets tam sim no nyob rau hauv cov qauv no xaus rau ntawm lub areoles. Qhov kawg txheej txheem ntawm veinlets yog hu ua cais.
Daim duab 01: Reticulate Venation
Cov leeg muaj xylem hlwb thiab phloem hlwb. Lub xylem koom nrog hauv kev thauj mus los ntawm cov dej mus rau hauv nplooj los ntawm stalk thiab faib thoob plaws hauv mesophyll ntawm nplooj. Lub phloem translocates cov khoom noj uas tsim los ntawm photosynthesis los ntawm nplooj mus rau ntau qhov chaw ntawm lub cev cog. Lub vascular hlwb yog embedded nyob rau hauv lub parenchyma thiab yog surrounded los ntawm cov ntaub qhwv cell. Zoo ib yam li kev sib luag venation, nyob rau hauv theem nrab venation, hom ntawm cov hlab ntsha xaus sib txawv. Nws yog xaus rau ntawm nplooj ntawv los yog nyiam mus txuas nrog lwm cov leeg tam sim no. Piv txwv rau reticulate venation yog hibiscus thiab txiv nkhaus taw. Reticulate venation yog tus yam ntxwv ntawm cov nroj tsuag dicot.
Parallel Venation yog dab tsi?
Ua ntej mus txog lub sij hawm sib luag venation, cov ntsiab lus thawj cov hlab ntsha thiab cov hlab ntsha thib ob tau piav qhia. Cov hlab ntsha uas nkag mus rau hauv nplooj los ntawm cov petioles yog hu ua thawj cov hlab ntsha lossis thawj cov hlab ntsha. Hauv cov ntsiab lus botanical, nplooj nplooj petiole yog stalk uas txuas cov nplooj nplooj nrog qia. Thawj cov hlab ntsha uas nkag mus ntxiv faib rau hauv cov ceg uas raug xa mus rau cov hlab ntsha thib ob lossis cov leeg thib ob. Cov hlab ntsha tseem ceeb muaj txoj kab uas hla ntau dua thaum piv nrog cov hlab ntsha thib ob. Cov leeg yog tsim los ntawm xylem thiab phloem hlwb. Lawv yog embedded nyob rau hauv lub parenchyma nyob rau hauv cov ntaub so ntswg sclerenchyma uas yog surrounded los ntawm pob sheath hlwb. Lawv ua haujlwm hauv kev thauj khoom. Cov hlab ntsha xylem thauj dej thiab lwm yam minerals los ntawm cov stalk thoob plaws hauv cov nplooj mesophyll thaum lub phloem vein translocated cov khoom noj uas tsim los ntawm photosynthesis tawm ntawm nplooj thiab muab nws mus rau tag nrho cov nroj tsuag lub cev.
Nyob rau hauv parallel venation, thawj cov hlab ntsha yog nyob rau hauv parallel thiab ntawm sib npaug zos nyob rau hauv cov nplooj thiab converge mus rau lub apex ntawm nplooj. Lub converging feem ntau hu ua anastomosis; fusion mus rau apex. Cov hlab ntsha me me koom nrog cov leeg tseem ceeb tab sis muaj peev xwm txiav tawm uas xaus nrog cov leeg zoo. Hauv cov kab mob angiosperms, cov hlab ntsha me yog tshwm sim. Hauv cov ntsiab lus ntawm cov hlab ntsha xaus, tus lej yog qhov sib txawv heev. Qhov no tuaj yeem yog cov hlab ntsha thib ob kawg ntawm cov npoo ntawm nplooj lossis cuam tshuam nrog kev tsim cov kev sib txuas rov qab mus rau lwm cov leeg. Cov hlab ntsha ua haujlwm raws li kev sib koom ua ke ntawm ntau yam tshuaj rau cov nplooj thiab koom nrog muab kev txhawb nqa rau nplooj.
Daim duab 02: Parallel Venation
Parallel venation tam sim no nyob rau hauv feem ntau cov nroj tsuag monocot ib txwm correlates nrog cov duab ntawm nplooj. Lawv muaj elongated nplooj nrog ib tug broadleaf puag. Qhov piv txwv tseem ceeb tshaj plaws uas tuaj yeem muab tau rau qhov sib npaug venation yog txiv tsawb. Tsis tas li ntawd, monocots xws li pobkws, nplej, nplej, nyom, thiab sorghum ua kom pom kev sib luag.
Dab tsi zoo sib xws ntawm Reticulate thiab Parallel Venation?
- Ob lub venations muaj xylem thiab phloem hlwb.
- Ob leeg koom nrog kev thauj mus los ntawm dej thiab zaub mov.
- Ob lub venations muab txhua yam kev txhawb nqa rau nplooj.
Qhov txawv ntawm Reticulate thiab Parallel Venation yog dab tsi?
Reticulate Venation vs Parallel Venation |
|
| Nyob rau hauv reticulate venation, cov leeg tsim ib tug zoo li tus qauv uas muaj nyob rau ntawm ob sab ntawm lub midrib. | Nyob rau hauv parallel venation, cov leeg tsim nyob rau hauv parallel rau ib leeg ntawm petiole mus rau nplooj nplooj. |
| Nyob nroj tsuag | |
| Reticulate venation yog tus yam ntxwv ntawm cov nroj tsuag dicot. | Parallel venation yog tus yam ntxwv ntawm cov nroj tsuag monocot. |
| Examples | |
| Hibiscus thiab txiv nkhaus taw yog qee qhov piv txwv ntawm cov nroj tsuag uas qhia txog kev ua kom zoo nkauj. | pob kws, txiv tsawb, thiab nplej yog qee yam piv txwv ntawm cov nroj tsuag uas qhia qhov sib npaug. |
Summary – Reticulate vs Parallel Venation
Cov leeg yog cov qauv tseem ceeb ntawm cov nplooj ntoo. Lawv koom nrog hauv kev thauj mus los ntawm cov zaub mov tsim tawm hauv nplooj los ntawm photosynthesis thiab kev thauj mus los ntawm dej rau hauv nplooj. Cov leeg muab txhua yam muaj zog rau nplooj. Raws li tus qauv ntawm kev kho cov leeg muaj ob hom; parallel venation thiab reticulate venation. Nyob rau hauv reticulate venation, cov leeg tsim ib tug net-zoo li qauv uas muaj nyob rau ntawm ob sab nyob rau hauv lub midrib. Nyob rau hauv parallel venation, cov leeg tsim nyob rau hauv parallel rau ib leeg los ntawm petiole mus rau nplooj nplooj. Nyob rau hauv cov nroj tsuag dicot, reticulate venation yog ib tug yam ntxwv feature, thiab nyob rau hauv monocot nroj tsuag, nws yog lub parallel venation uas muab ib tug yam ntxwv feature. Qhov no tuaj yeem raug suav hais tias yog qhov sib txawv ntawm reticulate venation thiab parallel venation.
Download the PDF Version of Reticulate vs Parallel Venation
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv ntawm Reticulate thiab Parallel Venation
