Litsebi tsa baeloji Univesithing ea Sechaba ea Singapore li fumane kamoo limela li thibelang ho thehoa ha stomata le li-microscopic pores holim'a tsona ho fokotsa tahlehelo ea metsi nakong ea komello. Pys.org portal.
Stomata, e leng teng ka holim'a makhasi, e bohlokoa bakeng sa phapanyetsano ea khase pakeng tsa limela le sepakapaka. Leha ho le joalo, hape ke mehloli e meholo ea tahlehelo ea metsi ha e siea makhasi e le mouoane oa metsi. Ha ho e-na le khaello ea metsi, limela li etsa liphetoho tse peli tsa stomatal ho boloka metsi: li koala likoti tsa stomata tse teng le ho fokotsa ho thehoa ha tse ncha.
Likarabo tsena, tse kentsoeng ke abscisic acid (ABA), li bohlokoa bakeng sa ho ikamahanya le limela ho komello 'me li bohlokoa haholo bakeng sa ho boloka katleho ea temo maemong a leholimo a fetohang. Leha ho le joalo, ha e e-s'o ithutoe hantle hore na ABA e thibela tlhahiso ea stomatal joang.
Tokollong ea morao-rao Tsoelo-pele ea Saense Sehlopha sa lipatlisiso se etelletsoeng pele ke Moprofesa oa Motlatsi oa LAU On Sun ho tsoa Lefapheng la Biological Sciences Univesithing ea Sechaba ea Singapore se tlalehile ka mochine o bakang khatello ena ea komello ea tsoelo-pele ea stomatal.
Bo-ramahlale ba fumane hore komello e kholo e kentsoeng ke ABA e bonts'ang kinases ka ho toba phosphorylate the master stomatal regulator SPEECHLESS (SPCH). Phosphorylation e bolela ho phaella ha sehlopha sa phosphate molek'hule. Phosphorylation ena e bakoang ke ABA ea protheine ea SPCH e etsahala libakeng tse peli tse fapaneng 'me e baka ho senyeha ha SPCH.
Hobane SPCH e khothalletsa nts'etsopele ea stomatal, SPCH phosphorylation e lebisa ho fokotseha ha maemo a SPCH le palo ea stomata, 'me ho felisoa ha libaka tsena (sample S240/271A) ho hlahisitse karabelo e fapaneng. Habohlokoa, bafuputsi ba boetse ba bonts'a hore limela tse nang le libaka tse fetotsoeng tsa SPCH phosphorylation li bontšitse mamello e fapaneng ea komello.
Liphetho tsena li bontša hore "khoutu" e itseng e fana ka karabelo ea bohlokoa ea limela ho baballa metsi. Ka ho e qhekella, re ne re ka lokisa boemo ba komello ea lijalo tsa lijalo le ho li thusa ho ntlafatsa maemo a fapaneng a ho hola, ho tloha ho temo ea setso ho ea litoropong.