Mesotrione selective herbicide yekudzivirira goho

Chigadzirwa tsananguro

Mesotrione mushonga mutsva uri kugadzirwa kuitira sarudzo isati yamera uye mushure mekumera kwemhando dzakasiyana-siyana dzemashizha makuru nehuswa muchibage (Zea mays).Iyo inhengo ye benzoylcyclohexane-1,3-dione mhuri yemishonga yesora, iyo inotorwa nekemikari kubva kune yakasikwa phytotoxin inowanikwa kubva kuCalifornian bottlebrush chirimwa, Callistemon citrinus.Mushonga unobata nemakwikwi inhibition ye enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD), chikamu chebiochemical pathway inoshandura tyrosine kuplastoquinone uye alpha-tocopherol.Mesotrione inhibitor ine simba zvakanyanya yeHPPD kubva kuArabidopsis thaliana, ine Ki value ye c 6-18 pM.Inokurumidza kutorwa nemhando dzemasora mushure mekushandiswa kwefoliar, uye inogoverwa mukati memiti neacropetal uye basipetal movement.Chibage chinoshingirira mesotrione nekuda kwekusarudzwa kwemetabolism nechirimwa.Kutorwa zvishoma nezvishoma kwemesotrione, maererano nemhando dzesora dzinobatwa nesora, zvinogonawo kubatsira pakushandiswa kwayo semushonga wesora unoshandiswa muchibage.Mesotrione inopa kutonga kwemasora makuru ane mashizha, uye inogona kushandiswa muzvirongwa zvakabatanidzwa zvekugadzirisa sora zvichienderana nesarudzo yemurimi yekudzivirira sora.

Mesotrione inhibits enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD).Iyo inhibitor ine simba zvakanyanya yeHPPD mukuedzwa kwemurabhoritari uchishandisa chirimwa Arabidopsis thaliana, ine kukosha kweKi kunosvika gumi pM.Muzvirimwa, HPPD inodiwa kune biosynthesis ye tocopherols uye yeplastoquinone, iyo yakakosha mukugadzirwa kwecarotenoid.Inhibiton yenzira inozopedzisira yakonzera kuchena kwemashizha sezvo chlorophyll yakaderedzwa, ichiteverwa nekufa kwechirimwa.

Mesotrione mushonga wesora usati wamera uye usati wamera wekusarudza kubata uye kudzora kwasara kwesora remashizha muchibage, chibage chembeu, yellow popcorn uye chibage chinotapira.