Mesotrione kusankha herbicide pofuna kuteteza mbewu

Mafotokozedwe Akatundu

Mesotrione ndi mankhwala atsopano ophera udzu omwe akupangidwa kuti athe kusankha udzu wochuluka wa masamba otakata ndi udzu mu chimanga (Zea mays).Ndi membala wa banja la benzoylcyclohexane-1,3-dione la herbicides, omwe amachokera ku phytotoxin yachilengedwe yotengedwa ku chomera cha Californian bottlebrush, Callistemon citrinus.Mankhwalawa amagwira ntchito poletsa mpikisano wa enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD), gawo la njira ya biochemical yomwe imasintha tyrosine kukhala plastoquinone ndi alpha-tocopherol.Mesotrione ndi inhibitor yamphamvu kwambiri ya HPPD kuchokera ku Arabidopsis thaliana, yokhala ndi mtengo wa Ki wa c 6-18 pM.Udzu umatengedwa mwachangu ndi udzu ukatsatira masamba, ndipo umagawidwa muzomera ndi acropetal ndi basipetal movement.Chimanga chimalekerera mesotrione chifukwa chosankha kagayidwe kake ndi mbewu.Kusamwa pang'onopang'ono kwa mesotrione, poyerekeza ndi mitundu ya udzu yomwe ingatengeke pang'onopang'ono, kungathandizenso ntchito yake ngati mankhwala opha udzu omwe amagwiritsidwa ntchito pachimanga.Mesotrione imapereka kuwongolera kwa namsongole wamkulu wamasamba otakata, ndipo itha kugwiritsidwa ntchito m'mapulogalamu ophatikizika osamalira udzu malinga ndi njira yomwe wolimayo amasankha polimbana ndi udzu.

Mesotrione imalepheretsa enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD).Ndi choletsa champhamvu kwambiri cha HPPD pamayeso a labotale pogwiritsa ntchito chomera cha Arabidopsis thaliana, chokhala ndi mtengo wa Ki pafupifupi 10 pM.Muzomera, HPPD ndiyofunikira pakupanga biosynthesis ya tocopherols ndi plastoquinone, yomwe ndiyofunikira pakupanga carotenoid.Kuletsa kwanjira kumabweretsa kuyera kwa masamba pomwe chlorophyll imawonongeka, kenako mbewu kufa.

Mesotrione ndi mankhwala ophera udzu usanayambike komanso ukamera posankha kukhudzana ndi udzu wotsalira m'munda wa chimanga, chimanga, ma popcorn achikasu ndi chimanga chokoma.