Study on relative sensitivity of maize (Zea mays L.) Nongda108 and Nongda3138 to sulfony-lurea herbicide chlorsulfuron and tribenuron-methyl using maize taproot length by sand bioassy indicated that, Nongda3138 had hi...Study on relative sensitivity of maize (Zea mays L.) Nongda108 and Nongda3138 to sulfony-lurea herbicide chlorsulfuron and tribenuron-methyl using maize taproot length by sand bioassy indicated that, Nongda3138 had higher tolerance to chlorsulfuron and tribenuron-methyl than Nongda108 did. Chlorsulfuron had stronger growth inhibition to maize Nongda108 and Nongda3138 than tribenuron-methyl did. Study on target enzyme of sulfonylurea herbicide acetolactate synthase (ALS) showed that, chlorsulfuron and tribenuron-methyl inhibited ALS in vitro strongly, and non-competitively. In the same concentration of inhibitors, chlorsulfuron had stronger ALS activity inhibition than tribenuron-methyl did. Lower level of chlorsulfuron and tribenuron-methyl has no ALS activity inhibition in vivo, the ALS inhibition only occurred in the condition of high concentration of chlorsulfuron and tribenuron-methyl in vivo.展开更多
Oxo-1, 15-pentadecanlactam 7 was synthesized from cyclododecanone with a total yield of 36% in a seven-step reaction. The azide 5 to 12-nitro-1, 15-pentadecanlactam 6 is the key step featured by direct ring expansion.
Four 5-deoxy-5-acyloxyiminoavermectin B1 derivatives 4a^d were synthesized via three steps from avermectin B1 and their biological activities were tested against Heliothis armigera, Laphygma exigua and Musca domestica.
文摘Study on relative sensitivity of maize (Zea mays L.) Nongda108 and Nongda3138 to sulfony-lurea herbicide chlorsulfuron and tribenuron-methyl using maize taproot length by sand bioassy indicated that, Nongda3138 had higher tolerance to chlorsulfuron and tribenuron-methyl than Nongda108 did. Chlorsulfuron had stronger growth inhibition to maize Nongda108 and Nongda3138 than tribenuron-methyl did. Study on target enzyme of sulfonylurea herbicide acetolactate synthase (ALS) showed that, chlorsulfuron and tribenuron-methyl inhibited ALS in vitro strongly, and non-competitively. In the same concentration of inhibitors, chlorsulfuron had stronger ALS activity inhibition than tribenuron-methyl did. Lower level of chlorsulfuron and tribenuron-methyl has no ALS activity inhibition in vivo, the ALS inhibition only occurred in the condition of high concentration of chlorsulfuron and tribenuron-methyl in vivo.
文摘Oxo-1, 15-pentadecanlactam 7 was synthesized from cyclododecanone with a total yield of 36% in a seven-step reaction. The azide 5 to 12-nitro-1, 15-pentadecanlactam 6 is the key step featured by direct ring expansion.
文摘Four 5-deoxy-5-acyloxyiminoavermectin B1 derivatives 4a^d were synthesized via three steps from avermectin B1 and their biological activities were tested against Heliothis armigera, Laphygma exigua and Musca domestica.
