Qhov Tseem Ceeb Qhov txawv - Fibers vs Sclereids
Cov noob cog tau muab faib ua peb hom tseem ceeb xws li parenchyma, collenchyma, thiab sclerenchyma. Lawv muaj lawv cov yam ntxwv tshwj xeeb thiab kev ua haujlwm zoo uas pab rau cov nroj tsuag kev loj hlob thiab kev loj hlob. Lub luag haujlwm tseem ceeb ntawm sclerenchyma hlwb yog muab cov khoom siv dag zog rau cov nroj tsuag thiab cov hlwb paub tab muaj lignin deposits uas yog cov yam ntxwv ntawm sclerenchyma. Muaj ob hom sclerenchyma hlwb xws li Fibers thiab Sclereids. Sclerenchyma fibers yog elongated hlwb uas ntev tapered kawg thiab muaj nyob rau hauv feem ntau ntawm cov nroj tsuag. Lawv tsim los ntawm cov hlwb meristematic. Sclerenchyma Sclereids yog cov hlwb uas muaj cov duab sib txawv thiab muab faib rau hauv cortex, pith, xylem, thiab phloem. Lawv tshwm sim los ntawm thickening ntawm parenchymal hlwb. Qhov sib txawv tseem ceeb ntawm fibers thiab sclereids yog cov duab ntawm cov hlwb. Fibers ntev thiab elongated nrog tapering xaus whereas Sclereids muaj ntau yam duab feem ntau puag ncig los yog oval nyob rau hauv cov duab.
YFibres yog dab tsi?
Sclerenchyma fibers yog cov hlwb uas elongated thiab muaj cov yam ntxwv tapering xaus uas tau muab faib thoob plaws hauv cov nroj tsuag. Cov fibers no tau npaj ua fiber ntau pob uas koom nrog inducing mechanical zog rau cov nroj tsuag. Fibers yog nplua nuj nyob rau hauv lignin thaum pectin thiab cellulose tsis tuaj. Cov hlwb muaj tsawg affinity rau dej yog li ntawd, lawv tsis hydrated. Cov hlwb fiber ntau ntawm sclerenchyma kuj muaj cov pits faib raws cov cell elongated.
Fibres raug faib thoob plaws hauv cov nroj tsuag vim lawv feem ntau ua haujlwm los muab cov khoom siv dag zog rau cov nroj tsuag. Nyob ntawm qhov chaw faib khoom, hom fiber ntau yuav txawv ntawm cov qauv. Cov hom fibers feem ntau yog muab faib ua ob pawg loj xws li xylary thiab ntxiv-xylary.
Type of Fibers
YXylary Fibres
Xylary fibers yog cov fibers uas cuam tshuam nrog xylem. Xylary fibers yog plaub hom tseem ceeb xws li libriform fibers, fiber ntau tracheids, septate fibers thiab mucilage fibers. Libriform fibers muaj qhov ntev thiab yooj yim thaum fiber ntau tracheids muaj qhov luv luv tab sis ciam teb. Septate fibers muaj septa lossis cross phab ntsa tsim nyob rau hauv lub cell fiber. Qhov no ua rau muaj kev faib tawm ntawm cov cell fiber. Septate fibers muaj nyob rau hauv cov hlwb uas yog mitotically faib. Mucilage fibers yog cov fibers uas yog tsim los ntawm ib txheej gelatinous. Cov mucilage fibers tsis tuaj yeem paub meej tias xylary lossis ntxiv-xylary.
Ntxiv-xylary Fibers
Ntxiv-xylary fibers yog txuam nrog cov ntaub so ntswg uas tsis yog xylem. Extra-xylary fibers yog cais raws li phloem fibers, pericyclic / perivascular fibers thiab cortical fibers. Phloem fibers yog txuam nrog phloem. Cov phloem fibers txuam nrog thawj phloem yog hu ua 'Bast fiber' whereas cov fibers txuam nrog cov theem nrab phloem yog hu ua 'Flax fiber'. Phloem fibers yog mos thiab feem ntau tsis yog lignified yog li, hemp yog ib qho piv txwv zoo ntawm phloem fibers. Pericyclic los yog perivascular fibers yog faib nyob rau hauv stems ntawm dicots thiab lawv muaj nyob rau hauv ze ze rau lub vascular bundles ntawm cov nroj tsuag. Lignification yog qhov tseem ceeb hauv cov cell hom.
Daim duab 01: Sclerenchyma Fibres
Cortical fibers yog cov fibers extraxylary pom nyob rau hauv qia thiab tuaj hauv cortex xws li. Barley. Cortical fiber muab txhua yam muaj zog rau cov nroj tsuag lub cev.
Sclereids yog dab tsi?
Sclereids yog ib hom sclerenchyma hlwb uas muaj ntau yam duab, feem ntau nyob rau hauv oval lossis puag ncig. Sclereids yog cov hlwb luv uas muaj lignified ob phab ntsa cell thiab cov pits yooj yim. Lawv tau muab los ntawm cov hlwb parenchymal paub tab thiab muaj qib siab ntawm lignification. Lawv kuj muab txhua yam muaj zog rau cov nroj tsuag thiab muaj ntau txheej ntawm cov hlwb.
Types ntawm Sclereid Cells
Muaj 5 chav kawm tseem ceeb ntawm cov hlwb sclereid nyob ntawm qhov loj thiab cov duab ntawm tes; Brachysclereids los yog pob zeb hlwb, Macrosclereids, Osteosclereids, Astrosclereids, thiab Trichosclereids.
Daim duab 02: Sclereids
Brachysclereids uas tseem hu ua pob zeb hlwb yog isodiametric lossis elongated hauv cov duab. Lawv muab faib rau hauv cortex, phloem, thiab pith. Lawv feem ntau pom nyob rau hauv cov nqaij ntawm cov txiv hmab txiv ntoo xws li Guava thiab endocarp cheeb tsam ntawm txiv apples. Macroscleroids yog tus pas nrig thiab koom nrog hauv kev tsim cov palisade hauv cov noob qoob loo ntawm legumes. Osteoscleroids yog columnar nyob rau hauv cov duab. Lawv muab faib rau hauv sub-epidermal txheej ntawm cov noob txheej. Astrosceleroids yog lub hnub qub zoo li scleroid hlwb uas muaj qhov txuas ntxiv hauv lawv cov qauv ntawm tes. Lawv feem ntau pom nyob rau ntawm nplooj nplooj. Trichoscleroids yog cov hlwb scleroid uas muaj cov phab ntsa nyias thiab cov ceg ntoo. Lawv kuj pom muaj nyob ntawm nplooj nplooj.
Dab tsi yog qhov zoo sib xws ntawm Fibers thiab Sclereids?
- Ob hom cell yog sclerenchyma cells.
- Ob lub hlwb yog lignified.
- Ob lub hlwb muab kev txhawb zog rau cov nroj tsuag.
- Ob lub hlwb muaj nyob hauv xylem thiab phloem cov ntaub so ntswg.
Qhov txawv ntawm Fibers thiab Sclereids yog dab tsi?
Fibres vs Sclereids |
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| Sclerenchyma fibers yog cov hlwb elongated uas tau ntev tapered kawg thiab muaj nyob rau hauv feem ntau ntawm cov nroj tsuag. | Sclerenchyma Sclereids yog cov hlwb uas muaj qhov sib txawv thiab faib rau hauv cortex, pith, xylem, thiab phloem ntawm cov nroj tsuag. |
| Cell Origin | |
| Keeb kwm ntawm cov fibers yog meristematic. | Sclereids keeb kwm los ntawm mature parenchymal hlwb. |
| Fibres elongated. | Sclereids yog dav thiab ntau yam duab. |
| Cell Endings | |
| Fibres muaj qhov xaus. | Sclereids muaj qhov kawg. |
Summary – Fibers vs Sclereids
Sclerenchyma hlwb yog ib qho ntawm peb hom thawj cov hlwb pom hauv cov nroj tsuag. Lawv yog lignified thiab cais raws li fibers thiab Sclereids. Fibers yog elongated ntev hlwb uas muaj tapering xaus. Sclereids yog cov duab sib txawv thiab yog cov hlwb uas muaj qhov kawg. Ob lub xovtooj ntawm tes tau koom nrog hauv kev muab cov khoom siv dag zog rau cov nroj tsuag. Lawv raug faib thoob plaws hauv cov nroj tsuag. Qhov no tuaj yeem piav qhia qhov txawv ntawm fibers thiab sclereids.
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Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline lub hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Fibers thiab Sclereids
