Qhov sib txawv tseem ceeb ntawm photosynthesis thiab photorespiration yog qhov photosynthesis yog cov txheej txheem uas photoautotrophs, feem ntau ntsuab nroj tsuag, algae thiab cyanobacteria, tsim cov carbohydrates thiab oxygen los ntawm carbon dioxide thiab dej siv lub zog nyob rau hauv tshav ntuj thaum photorespiration yog ib sab. Cov tshuaj tiv thaiv uas cov enzyme RuBisCO oxygenates RuBP, ua rau qee lub zog tsim los ntawm photosynthesis yuav tsum tau nkim.
Photosynthesis thiab photorespiration yog ob txheej txheem uas tshwm sim hauv cov nroj tsuag. Txawm li cas los xij, photosynthesis yog txheej txheem tseem ceeb thaum photorespiration yog txheej txheem pov tseg. Qee lub zog thiab cov pa roj carbon monoxide yog nkim los ntawm photorespiration los ntawm enzyme hu ua RuBP oxygenase-carboxylase. Yog li photorespiration tuaj yeem raug xa mus rau raws li cov txheej txheem uas txo cov kev ua haujlwm ntawm photosynthesis hauv cov nroj tsuag.
Photosynthesis yog dab tsi?
Photosynthesis yog cov txheej txheem uas cov nroj tsuag ntsuab, cyanobacteria thiab algae hloov lub teeb lub zog rau hauv tshuaj lom neeg lub zog. Qhov no yog cov txheej txheem tshwj xeeb tshwm sim hauv photoautotrophs nkaus xwb. Cov kab mob no ntes lub zog los ntawm lub hnub ci thiab hloov mus rau hauv tshuaj lom neeg lub zog hauv daim ntawv ntawm carbohydrates, uas tuaj yeem siv los ntawm cov kab mob ua lawv cov zaub mov. Cov kab mob Photosynthetic tsis nyob ntawm lwm yam kab mob rau lawv cov zaub mov tsis zoo li tib neeg thiab lwm yam heterotrophs. Lawv tsim lawv tus kheej cov zaub mov los ntawm photosynthesis thiab muab lwm tus nrog lawv tsim. Hauv cov nroj tsuag, photosynthesis tshwm sim nyob rau hauv lub organelle hu ua chloroplast.
Daim duab 01: Photosynthesis
Cov xim hu ua chlorophylls los koom nrog hauv kev ntes lub teeb. Nroj tsuag nplooj yog qhov chaw tseem ceeb ntawm photosynthesis hauv cov nroj tsuag. Nplooj qauv txhawb nqa photosynthesis zoo los ntawm kev txo cov dej poob thiab los ntawm kev ua cov pa pauv tau zoo ntawm stomata. Siv ob peb kauj ruam, carbon dioxide thiab dej hloov mus rau hauv qabzib thiab oxygen siv lub zog hauv tshav ntuj. Muaj ob qhov kev tshwm sim loj hauv photosynthesis. Lawv yog cov tshuaj tiv thaiv lub teeb (cov tshuaj tiv thaiv lub teeb) thiab cov tshuaj tiv thaiv kev ywj pheej (cov tshuaj tiv thaiv tsaus ntuj lossis Calvin voj voog). Cov tshuaj tiv thaiv lub teeb ua rau ATP thiab NADPH thaum tsaus ntuj ua rau cov piam thaj molecules siv cov khoom ntawm cov tshuaj tiv thaiv lub teeb. Calvin lub voj voog ua tiav los ntawm peb theem tseem ceeb xws li carboxylation, txo qis thiab rov tsim dua tshiab. Raws li byproduct oxygen yog tso tawm rau cov cua thiab qhov no yog cov pa oxygen molecular uas peb ua pa. Thaum cov kab mob xav tau lub zog, lawv rhuav tshem cov piam thaj molecules feem ntau cov piam thaj thiab tsim ATP (lub zog molecules) rau lawv cov txheej txheem ntawm tes.
Photorespiration yog dab tsi?
Photorespiration yog ib qho kev tawm tsam ntawm Calvin lub voj voog. Thaum lub sij hawm Calvin lub voj voog, ib qho enzyme loj hu ua RuBP oxygenase - carboxylase (rubisco) converts RuBP rau hauv phosphoglyceraldehyde los ntawm kev sib xyaw carbon dioxide. Nws yog cov txheej txheem ntawm kev tsim cov piam thaj molecule. Txawm li cas los xij, cov enzyme no muaj peev xwm ua ke nrog cov pa oxygen es tsis txhob carbon dioxide. Qhov ntawd txhais tau tias Rubisco muaj peev xwm siv cov pa oxygen ua nws cov substrate es tsis txhob carbon dioxide. Thaum qhov no tshwm sim, nws pib cov txheej txheem saum toj no hu ua photorespiration. Photorespiration yeej nkim zog thiab ib co ntawm cov taag carbon.
Daim duab 02: Photorespiration
Tsis tas li ntawd, nws txo qis kev sib xyaw ntawm cov piam thaj molecules (nws txo cov piam thaj molecules uas tuaj yeem tsim los ntawm Calvin lub voj voog ib txwm). Photorespiration nyiam los ntawm ntau yam xws li cov pa roj carbon dioxide tsawg: cov pa oxygen, qhov kub thiab txias, thiab lwm yam. Thaum kub nce, rubisco enzyme muaj kev sib raug zoo rau cov pa ntau dua li carbon dioxide. Yog li ntawd, cov nroj tsuag uas loj hlob nyob rau hauv kub thiab qhuav tej yam kev mob undergo photorespiration ntau tshaj li cov nroj tsuag zus nyob rau hauv lwm qhov chaw. Txawm li cas los xij, plats qhia kev hloov pauv thiab cov txheej txheem sib txawv kom txo qis photorespiration thiab poob ntawm lub zog. Ib qho piv txwv yog C4 nroj tsuag.
Dab tsi zoo sib xws ntawm Photosynthesis thiab Photorespiration?
- Ob leeg tshwm sim hauv cov nroj tsuag.
- Hnub ci yog koom nrog photosynthesis thiab photorespiration.
- Ob leeg siv cov enzymes.
- Lawv tshwm sim hauv cellular organelles.
Qhov txawv ntawm Photosynthesis thiab Photorespiration yog dab tsi?
Photosynthesis thiab photorespiration yog ob txheej txheem tshwm sim hauv cov nroj tsuag. Photosynthesis tsim cov khoom noj thaum photorespiration pov tseg cov khoom ntawm photosynthesis. Qee cov nroj tsuag uas loj hlob nyob rau hauv kub thiab qhuav tej yam kev mob undergo photorespiration ntau. Li no, cov nroj tsuag sim txo qis photorespiration los ntawm kev siv ntau lub tshuab.
Cov hauv qab no nthuav tawm cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm photosynthesis thiab photorespiration hauv daim ntawv tabular.
Summary – Photosynthesis vs Photorespiration
Photosynthesis kho carbon dioxide thaum photorespiration pov tseg qee cov pa roj carbon monoxide los ntawm photosynthesis. Ob txoj kev yog enzyme-tsav. Thaum lub sij hawm photosynthesis, lub teeb lub zog hloov mus rau hauv tshuaj zog los ntawm photoautotrophs. Nws xav tau hnub ci, xim ntsuab xim, carbon dioxide thiab dej. Ntawm qhov tod tes, photorespiration ua hauj lwm raws li ib sab cov tshuaj tiv thaiv ntawm Calvin lub voj voog nyob rau hauv uas rubisco enzyme converts RuBP rau hauv PGA thiab PG los ntawm kev koom ua ke O 2 hloov CO 2Photorespiration tshwm sim nyob rau hauv qhov kub thiab txias thiab qis carbon dioxide concentrations. Qhov no yog qhov txawv ntawm photosynthesis thiab photorespiration.
