Me ya sa za a sami iskar oxygen da yawa? Bisa ga tambayar da ta gabata, ka rubuta mahallin da ke ɗauke da amsar. Zai iya zama jumla 1 - 20. Abubuwan da ke ciki:
Photorespiration na iya faruwa lokacin da yawan iskar oxygen ya yi yawa. Rubisco ba zai iya bambance tsakanin oxygen da carbon dioxide sosai ba, don haka yana iya ƙara O2 ba da gangan ba maimakon CO2 zuwa RuBP. Wannan tsari yana rage ingancin photosynthesis - yana cinye ATP da oxygen, yana sakin CO2, kuma baya samar da sukari. Zai iya ɓarnatar da rabin carbon da aka gyara ta hanyar sake zagayowar Calvin. Hanyoyi da yawa sun samo asali a cikin jinsuna daban-daban waɗanda ke ɗaga yawan ƙwayar carbon dioxide dangane da oxygen a cikin chloroplast, yana haɓaka ƙwarewar photosynthesis. Wadannan hanyoyin ana kiransu carbon dioxide mai da hankali, ko kuma CCMs. Wadannan sun hada da Crassulacean acid metabolism, C4 carbon fixation, da kuma pyrenoids. Chloroplasts a cikin tsire-tsire na C4 suna da ban sha'awa kamar yadda suke nuna bambancin bambancin chloroplast.