Qhov sib txawv tseem ceeb ntawm anatropous thiab orthotropous ovule yog qhov anatropous yog qhov feem ntau ovule orientation nyob rau hauv angiosperms nyob rau hauv uas lub ovule yog kiag li inverted nyob rau hauv 180 okom micropyle thiab hilum los nyob ze ib leeg. Lub caij no, orthotropous yog ib qho kev taw qhia ntawm ovule nyob rau hauv uas lub micropyle nyob ncaj qha rau hauv txoj kab nrog hilum.
Lub zes qe menyuam yog ib feem tseem ceeb ntawm cov poj niam cev xeeb tub ntawm cov paj ntoo. Nws muaj cov poj niam cev xeeb tub los yog ovule. Lub ovule yog txuas mus rau sab hauv phab ntsa ntawm zes qe menyuam los ntawm ib tug slender stalk hu ua funicle. Lub ntsiab lus ntawm kev txuas ntawm ovule rau nws cov funicle yog hilum. Ovule muaj ob qhov loj xws li nucellus thiab integument. Lub micropyle yog qhov qhib me me hauv qhov sib koom ua ke uas tso cai rau lub paj paj ntoos nkag mus rau hauv lub ovule. Raws li txoj hauj lwm ntawm micropyle thiab ovule orientation nrog rau cov funicle, muaj tsib hom ovules li orthotropous los yog atropous, anatropous, campylotropous, amphitropous thiab hemianatropous.
Dab tsi yog Anatropous Ovule?
Lub anatropous ovule yog ib qho kev hloov pauv ntawm ovule mus txog 1800. Yog li ntawd, micropyle thiab hilum nyob ze rau ib leeg. Yog li ntawd, micropyle tuaj ze ntawm funiculus. Lub cev ntawm ovule yog fused nrog funiculus ntawm ib sab.
Daim duab 01: Anatropous Ovule (1: embryo sac 2: chalaza 3: funiculus 4: raphe)
Ntxiv mus, qhov no yog qhov kev taw qhia ovule ntau tshaj plaws hauv cov paj ntoo. Hauv ntau dua 80% ntawm angiosperms, anatropous ovules tuaj yeem pom. Yog li ntawd, nyob rau hauv feem ntau dicots thiab monocots, anatropous ovules muaj ntau.
Ovule Orthotropous yog dab tsi?
Lub orthotropous ovule yog lwm hom ovule orientation pom hauv cov noob nroj tsuag. Hauv qhov kev taw qhia no, micropyle nyob ncaj qha rau hauv kab ntawm hilum. Yog li ntawd, micropyle, chalaza thiab funiculus pom nyob rau hauv tib kab.
Daim duab 02: Orthotropous Ovule (1: embryo sac 2: chalaza 3: funiculus)
Lub ovule yog ncaj. Yog li ntawd, lub micropyle nyob rau ntawm lub apex. Orthotropous ovules feem ntau pom nyob rau hauv cov tsev neeg cog: Polygonaceae thiab Piperaceae. Yog li ntawd, piv rau anatropous ovules, orthotropous ovules muaj tsawg dua.
Dab tsi zoo sib xws ntawm Anatropous thiab Orthotropous Ovule?
- Anatropous thiab orthotropous ovule yog ob ntawm tsib hom ovules pom hauv cov noob nroj tsuag.
- Lawv tuaj yeem pom hauv cov noob ntoo.
Qhov txawv ntawm Anatropous thiab Orthotropous Ovule yog dab tsi?
Anatropous yog qhov kev taw qhia ovule ntau tshaj plaws pom nyob rau hauv angiosperms uas lub ovule yog tag nrho inverted nyob rau hauv 180o kom micropyle thiab hilum los ze zog rau ib leeg. Ntawm qhov tod tes, orthotropous yog ib qho kev taw qhia ovule nyob rau hauv uas lub micropyle nyob ncaj qha rau hauv txoj kab nrog hilum. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm anatropous thiab orthotropous ovule. Tsis tas li ntawd, anatropous ovules tuaj yeem pom nyob rau hauv feem ntau dicots thiab monocots, thaum orthotropous ovules tuaj yeem pom nyob rau hauv cov nroj tsuag tsev neeg Polygonaceae thiab Piperaceae.
Ntxiv mus, lub ovule anatropous yog tag nrho inverted los ntawm 180 degrees. Nyob rau hauv sib piv, lub orthotropous ovule yog kiag li ncaj. Tsis tas li ntawd, nyob rau hauv anatropous ovule, lub cev ntawm ovule yog fused ntawm ib sab nrog funiculus, thaum nws tsis fused nrog funiculus nyob rau hauv orthotropous ovule. Tsis tas li ntawd, lwm qhov sib txawv ntawm anatropous thiab orthotropous ovule yog nyob rau hauv lub anatropous ovule, micropyle nyob rau hauv qab, ze ntawm funiculus thaum micropyle pom ntawm lub apex nyob rau hauv lub orthotropous ovule.
Hauv qab no yog kev sib piv infographic ntawm qhov sib txawv ntawm anatropous thiab orthotropous ovule.
Summary – Anatropous vs Orthotropous Ovule
Anatropous ovule thiab orthotropous ovule yog ob hom ovules raws li kev taw qhia ovule thiab txoj hauj lwm ntawm micropyle nrog rau hilum. Lub anatropous ovule yog ib tug kiag li inverted ovule mus txog 180 degrees. Yog li ntawd, lub micropyle tuaj yeem pom nyob hauv qab ze ze rau funiculus. Ntawm qhov tod tes, lub ovule orthotropous yog ib qho ovule ncaj nraim. Yog li ntawd, micropyle tuaj yeem pom ntawm lub apex. Tsis tas li ntawd, micropyle thiab hilum pw ncaj qha nyob rau hauv tib txoj kab hauv orthotropous ovule. Anatropous ovules pom nyob rau hauv feem ntau dicots thiab monocots, thaum orthotropous ovules pom nyob rau hauv cov nroj tsuag tsev neeg ntawm Polygonaceae thiab Piperaceae. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm anatropous thiab orthotropous ovule.
