Maitiro ePhotosynthesis muMiti
Photosynthesis inzira yemakemikari inokosha kuhupenyu hwepasi pano, kunyanya kuzvirimwa. Kuburikidza nephotosynthesis, zvirimwa zvinoshandura simba rezuva kuita simba remakemikari muchimiro cheglucose, iyo inoshandiswa senzvimbo yesimba yekukura nekukura. Chinyorwa chino chichatsanangura zvakadzama kuti photosynthesis inoitika sei muzvirimwa, kubva pakuvaka kwemasero kusvika pamabasa emakomikoro akakosha mukuita uku.
Nhanganyaya Yekutanga
Photosynthesis inoitika muma chloroplasts, ma organelles chaiwo ari mumasero emiti. Ma chloroplasts ane pigment yegirini inozivikanwa se chlorophyll, iyo inokwanisa kubata simba rechiedza kubva kuzuva. Maitiro e photosynthesis anogona kukamurwa kuita zvikamu zviviri zvikuru: maitiro echiedza (anoda chiedza) uye maitiro erima (asingade chiedza). Matanho maviri aya akabatana uye anoita basa rakakosha mukugadzirwa kweshuga yakapfava senge glucose kubva ku carbon dioxide nemvura.
Maumbirwo Emasero uye MaOrganelles Anobatanidzwa
1. MaChloroplast: MaChloroplast ndiwo nzvimbo huru yephotosynthesis. Aya maorganelles ane mamembrane maviri uye ane thylakoids, ayo anoumba grana. MaThylakoids ndipo panoitika chiedza chephotosynthesis.
2. Chlorophyll: Pigment iyi inonwisa chiedza chezuva, kunyanya munzvimbo dzebhuruu netsvuku dze spectrum, uye inoratidza chiedza chegirini, saka zvirimwa zvinoita segirini.
3. Stroma: Mvura inozadza ma chloroplast ari kunze kwe thylakoids, uko kunoitika ma "dark reactions" e photosynthesis.
Maitiro eChiedza
Kusangana kwechiedza kunoitika mu thylakoid membrane uye kunoda chiedza senzvimbo yesimba. Chinangwa chikuru chezviitiko izvi ndechekushandura simba rechiedza kuita simba remakemikari muchimiro cheATP (adenosine triphosphate) uye NADPH (nicotinamide adenine dinucleotide phosphate), zvose zvinoshandiswa mukuita kwerima.
1. Kunyudzwa kwechiedza: Chlorophyll iri mu thylakoids inonyudzwa simba rechiedza. Simba iri rinozoendeswa kunzvimbo ye reaction mu photosystem II.
2. Kugadzira Mvura: Mvura yakaparadzaniswa nema enzymes mu photosystem II inopatsanurwa kuita okisijeni, mapurotoni, nemaerekitironi. Okisijeni inoburitswa semugumisiro wemumhepo.
3. Kutamiswa kwemaerekitironi: Maerekitironi anobva mumvura anoyerera nepakati pecheni yekufambisa maerekitironi, rudzi rwenzira yemapuroteni inogadzira simba rekupomba mapurotoni mu thylakoid lumen, zvichigadzira proton gradient.
4. Kuumbwa kweATP: Kuchinja kweproton kunotanga enzyme yeATP synthase kuti ishandure ADP (adenosine diphosphate) kuita ATP.
5. Kuderedzwa kweNADP+: Maerekitironi anosvika kuphotosystem I uye anowana simba rakawanda rechiedza anoshandiswa kuderedza NADP+ kuita NADPH.
Kuita Kwerima (Calvin Cycle)
Kuchinja kwerima, kunozivikanwawo seCalvin Cycle, kunoitika mu stroma yema chloroplast uye hakudi chiedza. Kunoshandisa ATP neNADPH zvinogadzirwa mukuchinja kwechiedza kushandura kabhoni dioxide kuita glucose.
1. Kugadzika kweKabhoni: CO2 kubva mumhepo inogadziriswa neenzyme Rubisco kuita mamorekuru e3-phosphoglycerate (3-PGA).
2. Kuderedza: Kuburikidza nemaitiro akawanda anoshandisa ATP neNADPH, 3-PGA inoshandurwa kuita glyceraldehyde-3-phosphate (G3P/GA3P), shuga iri nyore.
3. Kugadzurwa kweRuBP: Imwe yeG3P inoshandiswa kugadzira glucose nemamwe makabhohaidhiretsi, nepo imwe inoshandiswa kugadzira ribulose bisphosphate (RuBP), iyo molecule inotanga kutenderera uku.
Zvinhu Zvinokanganisa Kugadzira Photosynthesis
Kugadzira chiedza (photosynthesis) kunokonzerwa nezvinhu zvakasiyana-siyana zvakatipoteredza, zvinosanganisira simba rechiedza, huwandu hweCO2, tembiricha, uye kuwanikwa kwemvura.
1. Kusimba kweChiedza: Kusimba kwechiedza kwakakwira, simba rinowanikwa rekuita kwechiedza rinokura, kusvika panzvimbo yakati saturation.
2. Kuwanda kweCO2: Kuwanda kweCO2 kunowedzera mwero wekugadzika kwekabhoni kusvika yasvika padanho rekuzara.
3. Tembiricha: Tembiricha inokanganisa mashandiro ema enzymes e photosynthetic. Pane tembiricha yakakwana iyo ma enzymes anoshanda zvakanaka, kazhinji pakati pe25 ne30°C kune zvirimwa zvakawanda.
4. Kuwanikwa kwemvura: Mvura ndeimwe yezvinokonzeresa kushanduka kwemvura mumuviri uye inokoshawo pakuchengetedza kumanikidzwa kwemasero.
Kukosha kwePhotosynthesis
Photosynthesis ndiyo hwaro hwezvikafu zvakawanda pasi pano. Haingopi mweya watinofema chete asiwo inogadzira simba remakemikari rinoshandiswa nezvinhu zvipenyu zvese.
1. Kugadzirwa kweOkisijeni: Okisijeni inogadzirwa kubva mumvura inobuda muchiedza (photolysis) inokosha zvikuru pakurarama kwemuviri.
2. Simba Rinobva: Glucose inogadzirwa ne photosynthesis ndiyo sosi huru yesimba kumiti uye, zvisina kunanga, kune zvimwe zvipenyu zvese zviri mu ecosystem.
3. Kutenderera kweKabhoni: Photosynthesis inoitawo basa rakakosha mukutenderera kwekabhoni pasi rose nekuderedza huwandu hweCO2 mumhepo.
Maitiro eBiotechnology
Kunzwisisa zviri nani maitiro ekugadzira photosynthesis kwakatoita kuti kushandiswa kwakasiyana-siyana kwe biotechnology, senge mainjiniya plants kuve nehunyanzvi mukushandisa chiedza kana CO2, izvo zvinogona kuwedzera goho rekurima uye kubatsira kurwisa shanduko yemamiriro ekunze.
Mhedziso
Photosynthesis inzira yakaoma asi ine hunyanzvi hwakanyanya inosanganisira maitiro akasiyana-siyana emakemikari uye emuviri. Kunzwisisa nzira iyi kunopa ruzivo rwakadzama pamusoro pekuti zvirimwa nenharaunda yedu zvinoshanda sei uye kunopa mukana wekushandisa nzira iyi kuti zvibatsire mune zvekurima uye zvakatipoteredza. Kubva pakutorwa kwechiedza nechlorophyll kusvika pakuumbwa kweglucose muCalvin Cycle, nhanho yega yega yephotosynthesis inoratidza kushamisa kwechisikigo kunoita kuti hupenyu hurambe huripo panyika yedu.
