Qhov sib txawv tseem ceeb ntawm cov neeg zov lub hlwb thiab cov chaw ua haujlwm hauv cov nroj tsuag yog tias cov cell tiv thaiv yog cov kab mob tshwj xeeb parenchyma uas nyob rau hauv cov stomata tam sim no nyob rau hauv cov epidermis ntawm nplooj, stems, thiab lwm yam thaum lub sij hawm cov hlwb yog cov nyob ib puag ncig txhawb cov hlwb ntawm cov neeg zov..
Stomata yog cov pores nyob rau hauv cov nroj tsuag epidermis uas pab txhawb kev sib pauv gaseous. Ob lub cev tiv thaiv ib puag ncig thiab tswj qhov loj ntawm lub stoma. Cov hlwb tiv thaiv no yog cov hlwb tshwj xeeb parenchyma. Muaj lwm hom hlwb hu ua cov hlwb hauv cov nroj tsuag. Subsidiary cells txhawb cov neeg zov lub hlwb los ntawm ib puag ncig lawv. Ob lub cell tiv thaiv thiab cov hlwb ua haujlwm yog cov hom cell tseem ceeb hauv kev ua haujlwm ntawm lub stomata hauv cov nroj tsuag. Li no, tsab xov xwm no tsom rau kev sib tham txog qhov sib txawv ntawm cov neeg saib xyuas thiab cov koom haum koom tes.
Guard Cells yog dab tsi?
Cov hlwb yog cov hlwb tshwj xeeb uas pom muaj nyob rau hauv cov epidermis ntawm nplooj, qia thiab lwm yam kabmob ntawm cov nroj tsuag. Guard hlwb ua kom tiav qhov tshwj xeeb muaj nuj nqi nyob ib puag ncig thiab tswj qhov loj ntawm stomata. Stomata yog cov pores uas pab txhawb kev sib pauv gaseous hauv cov nroj tsuag. Muaj ob lub cell tiv thaiv nyob ib ncig ntawm lub stoma. Muaj ntau stomata muaj nyob rau hauv qis epidermis ntawm nplooj. Yog li ntawd, muaj ntau lub cell tiv thaiv nyob rau hauv qis epidermis ntawm nplooj.
Cov hlwb tswj xyuas qhov qhib thiab kaw ntawm lub stomata ntawm lub sijhawm, tshwj xeeb tshaj yog thaum lub sijhawm photosynthesis. Nws yog ua los ntawm kev tswj cov dej tsis tu ncua uas muaj peev xwm gradient nyob rau hauv cov guard cells. Nyob rau hauv lub xub ntiag ntawm ib tug muaj peev xwm dej nyob rau hauv lub guard cells, cov neeg zov lub hlwb ua heev turgid. Yog li, qhov no ua rau qhib lub stoma pore. Piv txwv li, thaum lub sij hawm muaj dej tsis tshua muaj peev xwm nyob rau hauv cov neeg zov lub hlwb, cov neeg zov lub hlwb tsis tshua muaj turgid. Yog li, qhov no ua rau qhov kaw ntawm stoma pore. Cov kev cai ntawm cov dej muaj peev xwm hauv cov neeg zov me nyuam yuav siv qhov chaw los ntawm kev sib pauv hloov pauv hauv thiab tawm ntawm cov neeg zov menyuam.
Daim duab 01: Guard Cells
Cov hlwb yog cov hlwb tshwj xeeb parenchyma. Yog li ntawd, lawv muaj peev xwm mus photosynthesize thiab khaws cov zaub mov raws li hmoov txhuv nplej siab. Lawv kuj tswj tus nqi ntawm transpiration hauv cov nroj tsuag. Transpiration rub yuav pab txhawb kev txav dej ntawm cov hlab ntsha xylem thaum txias cov nroj tsuag.
Dab tsi yog Subsidiary Cells?
Cov kab mob sib txuas yog cov hlwb uas nyob ib puag ncig cov hlwb tiv thaiv. Lawv raug faib nyob rau hauv lub epidermis ntawm cov nroj tsuag nplooj los yog stems. Muaj ob lossis plaub lub voj voog ntawm cov hlwb nyob ib puag ncig cov neeg zov menyuam. Lawv yog cov tsis-photosynthetic hlwb vim lawv tsis muaj chloroplasts. Lub luag haujlwm tseem ceeb ntawm cov hlwb ua haujlwm yog los muab lub zog thiab pab txhawb kev ua haujlwm ntawm cov cell tiv thaiv. Hauv qhov no, lawv tswj cov kev txav ntawm ions hla lub hlwb zov. Tsis tas li ntawd, cov koom tes ua haujlwm tsim cov ciam teb sib cais ntawm ob lub cev tiv thaiv.
Daim duab 02: Subsidiary Cells
Muaj ntau hom kev koom tes hauv hlwb. Lawv yog anisocytic, paracytic thiab diacytic. Nyob rau hauv txhua yam ntawm peb hom no, qhov kev npaj ntawm cov hlwb subscription txawv. Anisocytic kev npaj muaj cov hlwb ua haujlwm tsis sib xws nyob ib puag ncig cov hlwb. Paracytic kev npaj muaj cov hlwb ua haujlwm raws li qhov ntev ntawm cov neeg zov lub hlwb thaum diacytic kev npaj muaj cov hlwb ua haujlwm nyob rau hauv txoj cai kaum rau cov neeg zov lub hlwb.
Dab tsi yog qhov zoo sib xws ntawm Guard Cells thiab Subsidiary Cells?
- Cov hlwb thiab cov hlwb ua haujlwm yog ob yam ntawm cov khoom siv hauv lub cev.
- Ob hom cell muaj nyob rau hauv daim tawv nqaij ntawm nplooj, qia thiab lwm yam kabmob ntawm cov nroj tsuag.
- Kuj, ob leeg yog lub hlwb.
- Ntxiv mus, ob lub hlwb tswj lub stomata muaj nuj nqi; nyob rau hauv lem, lawv tswj lub gaseous pauv ntawm cov nroj tsuag.
- Dhau li ntawd, ob lub hlwb ua lub luag haujlwm tseem ceeb hauv kev hloov pauv, txav dej, thiab koom nrog osmosis thaum cov txheej txheem cog.
Qhov txawv ntawm Guard Cells thiab Subsidiary Cells yog dab tsi?
Tus neeg saib xyuas cov hlwb thiab cov hlwb ua haujlwm yog ob yam tseem ceeb ntawm tes uas koom nrog stomata ntawm cov nroj tsuag. Qhov sib txawv tseem ceeb ntawm cov neeg zov lub hlwb thiab cov chaw ua haujlwm pabcuam yog nyob rau hauv kev faib tawm. Cov kab mob tiv thaiv ib puag ncig lub stomata thaum cov hlwb ua haujlwm nyob ib puag ncig cov neeg zov menyuam. Tsis tas li ntawd, nyob ib ncig ntawm ib lub stoma, muaj ob lub cev tiv thaiv. Tab sis, nyob ib ncig ntawm ib lub stoma, muaj ob mus rau plaub lub voj voog ntawm cov hlwb nyob ib puag ncig ob lub hlwb. Yog li, qhov no kuj yog qhov sib txawv ntawm cov neeg saib xyuas thiab cov koom haum.
Ntxiv mus, lwm qhov sib txawv tseem ceeb ntawm cov neeg zov me nyuam thiab cov hlwb ua haujlwm yog qhov muaj thiab tsis muaj chloroplasts. Cov hlwb tiv thaiv muaj chloroplasts thiab tuaj yeem ua kom photosynthesize thaum lub hlwb tsis muaj chloroplasts; Yog li ntawd, lawv tsis tuaj yeem photosynthesize.
Summary – Guard Cells vs Subsidiary Cells
Cov hlwb thiab cov hlwb ua haujlwm feem ntau muaj nyob rau hauv cov epidermis ntawm nplooj nplooj. Lawv muab tau los ntawm cov hlwb epidermal. Nyob rau hauv cov ntsiab lus ntawm qhov sib txawv ntawm cov neeg zov lub hlwb thiab cov neeg koom tes, cov neeg saib xyuas cov hlwb nyob ib puag ncig lub stomata thiab tswj cov kev ua haujlwm ntawm lub qhov quav thaum lub cev ua haujlwm nyob ib puag ncig cov neeg zov lub hlwb, muab lub zog thiab kev tiv thaiv kev ua haujlwm ntawm cov neeg zov lub hlwb. Ua ke, ob qho tib si zov lub hlwb thiab cov hlwb ua haujlwm tswj kev hloov pauv hauv cov nroj tsuag.
