Mesotrione selective herbicide rau kev tiv thaiv qoob loo

Khoom piav qhia

Mesotrione yog ib qho tshuaj tua kab tshiab uas tau tsim los rau kev xaiv ua ntej thiab tom qab kev tshwm sim ntawm ntau yam ntawm cov nplooj dav dav thiab cov nyom nyom hauv pobkws (Zea mays).Nws yog ib tug tswv cuab ntawm benzoylcyclohexane-1,3-dione tsev neeg ntawm herbicides, uas yog tshuaj derived los ntawm ib tug natural phytoxin tau los ntawm lub Californian bottlebrush cog, Callistemon citrinus.Lub compound ua los ntawm kev sib tw inhibition ntawm enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD), ib feem ntawm txoj kev biochemical uas hloov tyrosine rau plastoquinone thiab alpha-tocopherol.Mesotrione yog ib qho muaj zog heev inhibitor ntawm HPPD los ntawm Arabidopsis thaliana, nrog tus nqi Ki ntawm c 6-18 pM.Nws yog sai npaum li cas los ntawm cov nroj tsuag tom qab foliar daim ntawv thov, thiab yog faib nyob rau hauv cov nroj tsuag los ntawm ob qho tib si acropetal thiab basipetal zog.Pob kws yog kam rau mesotrione raws li qhov tshwm sim ntawm kev xaiv cov metabolism los ntawm cov qoob loo cog.Kev qeeb qeeb ntawm mesotrione, txheeb ze rau cov nroj tsuag uas raug kab mob, kuj tseem tuaj yeem pab txhawb rau nws cov txiaj ntsig raws li kev xaiv tshuaj tua kab rau siv hauv pob kws.Mesotrione muab kev tswj hwm ntawm cov nroj tsuag dav dav, thiab nws tuaj yeem siv rau hauv cov kev tswj hwm kev tswj hwm kev sib xyaw ua ke nyob ntawm tus neeg cog qoob loo nyiam cov nroj tsuag-tswj cov tswv yim.

Mesotrione inhibits enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD).Nws yog ib qho muaj zog heev inhibitor ntawm HPPD hauv kev kuaj sim siv cov nroj tsuag Arabidopsis thaliana, nrog tus nqi Ki ntawm li 10 pM.Hauv cov nroj tsuag, HPPD yog qhov tsim nyog rau biosynthesis ntawm tocopherols thiab plastoquinone, uas yog qhov tseem ceeb rau kev tsim cov carotenoid.Inhibiton ntawm txoj hauv kev thaum kawg ua rau cov bleaching ntawm nplooj raws li chlorophyll degraded, ua raws li cov nroj tsuag tuag.

Mesotrione yog cov tshuaj tua kab mob ua ntej thiab tom qab tshwm sim rau kev xaiv kev sib cuag thiab kev tswj xyuas qhov seem ntawm cov nroj tsuag hauv cov pob kws, cov noob pob kws, paj paj daj thiab pob kws qab zib.