Mu nyama, kuwonongeka kwa DNA kungayambitse kupanga zotupa. Ngakhale kuti zomera zimakhala kwa nthawi yaitali popanda khansa, kukula kwawo kumalepheretsedwa ndi zinthu zambiri zachilengedwe, monga ma radiation, salinity, zitsulo zolemera komanso kusefukira kwa madzi, zomwe zingayambitse kuwonongeka kwa DNA ndi kuchepetsa zokolola.
Kodi zomera zimadziteteza bwanji ku DNA?
Gulu lofufuza kuchokera ku Qingdao Institute of Bioenergy and Bioprocessor Technology (QIBEBT) la Chinese Academy of Sciences (CAS) likupereka yankho ku funsoli. Iwo anazindikiritsa mapuloteni otchedwa MAC, omwe ndi ofunikira kuti zomera zisamawonongeke ku DNA kuwonongeka, malipoti Tsamba la Phys.org.
Ntchito yawo idasindikizidwa mu nyuzipepala Plant Physiology pa Novembara 4.
Ofufuzawa adapeza kuti zomera zopanda mapuloteni a MAC zimasonyeza zolakwika za kukula ndipo zinkawonongeka mosavuta ndi methyl methanesulfonate (MMS), mankhwala omwe amachititsa kuti DNA iwonongeke.
Adapezanso kuti kulolerana kwakukulu kwa boron kwa masinthidwe a MAC awa kudachepetsedwa. Kuchuluka kwa boron m'nthaka kumawononga zokolola ndi michere m'zakudya.
Mlingo wa mapuloteni a MAC5A (gawo la MAC complex) unkayendetsedwa ndi 26S proteasome (26SP), makina a molekyulu omwe amafunikira kuti apange mapuloteni pogwiritsa ntchito kuyanjana kwachindunji.
Mothandizidwa ndi biochemical ndi Kupyolera mu kusanthula kwa majini, ofufuzawo adapeza mapuloteni awiri omwe amagwira ntchito limodzi kuti ateteze zomera ku kuwonongeka kwa DNA komwe kumachitika chifukwa cha methyl methanesulfonate ndi boron yapamwamba.
Kafukufukuyu adavumbula njira zamamolekyulu za momwe zomera zimachitira ndi kuwonongeka kwa DNA ndipo zinapereka chinsinsi chatsopano chowongolera kalimidwe ka mbeu ndi ubwino wa chakudya.