Ib pab neeg ntawm cov kws tshawb fawb tau tsim cov tshuaj lom neeg tshiab uas inhibits photosynthesis hauv cov nplooj nplooj: nws inhibits cov kev ua ntawm cov protein complex uas ua tawm ib qho tseem ceeb ntawm cov txheej txheem - decomposition ntawm dej rau oxygen. Cov tshuaj no tuaj yeem dhau los ua qauv ntawm cov tshuaj tua kab mob uas tua cov nroj tsuag, thaum nws tsis muaj teeb meem rau tib neeg thiab tsiaj txhu. Cov txiaj ntsig ntawm txoj kev tshawb fawb, tau txais kev txhawb nqa los ntawm cov nyiaj pab los ntawm Lavxias Science Foundation (RSF), tau luam tawm hauv phau ntawv xov xwm Cells, ceeb toom "Gazeta.ru".
Photosynthesis yog cov txheej txheem uas cov nroj tsuag tsim cov organic tebchaw los ntawm carbon dioxide thiab dej hauv lub teeb. Nws yog nqa tawm nrog kev pab los ntawm ob lub loj protein complexes - photosystems 1 thiab 2 (PS1 thiab PS2), txhua yam uas muaj cov tshuaj tiv thaiv chaw, ib puag ncig cov proteins thiab pigments. Nyob rau ntawm lub hnub ci, chlorophyll nyob rau hauv qhov chaw tshuaj tiv thaiv mus rau hauv lub xeev zoo siab thiab hloov nws cov electrons mus rau lwm cov molecules hauv photosystem. Cov kev hloov hluav taws xob tom ntej yog nrog los ntawm kev sib sau ntawm cov khoom siv hluav taws xob siab, xws li ATP, koom nrog hauv kev sib txuas ntawm cov organic tebchaw. Qhov tsis muaj electrons poob los ntawm chlorophyll yog them los ntawm decomposition ntawm dej molecules - nws yog thaum lub sij hawm tus txheej txheem no uas oxygen tso tawm raws li ib tug by-product.
Cov kws tshawb fawb los ntawm Lub Tsev Kawm Ntawv ntawm Cov Teeb Meem Txog Kev Nyuaj Siab ntawm Lavxias Academy ntawm Kev Tshawb Fawb (Pushchino) thiab cov npoj yaig los ntawm Gazi University (Turkey) tau tsim cov khoom sib xyaw tshiab raws li tooj liab thiab cov khoom tawg yooj yim uas suppresses photosynthesis hauv nplooj. Txhawm rau txiav txim siab cov txiaj ntsig ntawm cov tshuaj, cov kws sau ntawv cais PS2-enriched thylakoid daim nyias nyias - cov qauv hauv chloroplasts - los ntawm nplooj thiab ntxiv cov tshuaj ntawm cov tshuaj tshiab rau qhov kev ncua. Cov nyhuv inhibitory tau soj ntsuam los ntawm ntau npaum li cas lub teeb-induced oxygen tso tawm - yog li, nws tus nqi raug txo los ntawm 69%. Tsis tas li ntawd, cov nyhuv ntawm cov tshuaj tau raug tshuaj xyuas los ntawm ntau lwm cov tshuaj tiv thaiv uas qhia txog kev ua ntawm PS2: piv txwv li, ntxiv rau inhibitor txo qhov ci ntawm chlorophyll thaum lub sijhawm photosynthesis. Nyob rau tib lub sijhawm, qhov ua tau zoo ntawm cov tshuaj tsis hloov lub sijhawm, tab sis tsuas yog nyob ntawm nws cov concentration.
Kev txo qis hauv cov pa oxygen tau qhia tias lub photosystem ua haujlwm tsawg dua. Nws tau xav tias lub hom phiaj tseem ceeb ntawm cov tshuaj tua kab mob tshiab yog qhov chaw tshuaj tiv thaiv ntawm cov protein complex: cov khoom khi rau PS2 core thiab hloov nws cov qauv. Yog li ntawd, cov kws tshawb fawb ntseeg tias, cov txheej txheem ntawm kev them nqi hloov pauv ntawm cov khoom siv hluav taws xob thauj khoom tau cuam tshuam.
Tus tsim inhibitor tuaj yeem siv los tsim cov tshuaj tua kab tshiab, uas yuav siv tau, piv txwv li, hauv kev sib ntaus tawm tsam cov nroj tsuag sai sai uas tshwm sim ua ntej cov qoob loo germinate. Txij li thaum cov tshuaj tiv thaiv decomposition ntawm cov dej tshwm sim tsuas yog nyob rau hauv cov nroj tsuag cell, cov tshuaj tua kab mob yuav muaj kev nyab xeeb kiag li rau tib neeg thiab tsiaj txhu.
"Peb tau tsim ib qho kev sib xyaw ua ke uas yuav pab tshem tawm cov nroj tsuag tsis xav tau, yog li ua rau cov qoob loo nce ntxiv. Cov ntaub ntawv no tuaj yeem dhau los ua lub hauv paus tseem ceeb rau kev txhim kho cov khoom siv uas ua tau zoo ntawm qhov qis tshaj qhov ua tau zoo, "said thawj tus kws sau ua haujlwm, Sergei Zharmukhamedov, Tus Neeg Sib Tw ntawm Biological Sciences, tus thawj coj tshawb fawb ntawm Lub Tsev Haujlwm Saib Xyuas Kev Noj Qab Haus Huv ntawm Lavxias. Academy ntawm Sciences.
Cov kws tshawb fawb los ntawm Lub Tsev Haujlwm ntawm Molecular Biology thiab Biotechnology ntawm National Academy of Sciences of Azerbaijan (Baku), lub koom haum ntawm tsob nroj Physiology muaj npe tom qab K.A. kuj tau koom nrog hauv txoj kev tshawb no. Timiryazev (Moscow), King Saud University (Saudi Arabia) thiab Moscow State University muaj npe tom qab M.V. Lomonosov (Moscow).