At the turn of the year,major state-owned enterprises such as CNPC,Sinopec and CNOOC held their 2025 town hall meetings to review the past year's achievements,summarize experiences,identify gaps,plan new tasks,and...At the turn of the year,major state-owned enterprises such as CNPC,Sinopec and CNOOC held their 2025 town hall meetings to review the past year's achievements,summarize experiences,identify gaps,plan new tasks,and set clear directions for efforts in the coming year.展开更多
Atrazine accumulation,oxidative stress,and defense response in maize seedlings exposed to extraneous atrazine were studied.Accumulation of atrazine in maize increased with increasing exposure concentration.The abscisi...Atrazine accumulation,oxidative stress,and defense response in maize seedlings exposed to extraneous atrazine were studied.Accumulation of atrazine in maize increased with increasing exposure concentration.The abscisic acid（ABA） content was positively correlated with the atrazine concentrations in maize roots and shoots（p 0.05）.Hydroxyl radical（.OH） in maize was determined in vivo with electron paramagnetic resonance spectroscopy.Its intensity was positively correlated with atrazine concentration in roots and shoots（p 0.05）,and higher level of.OH generated in roots than in shoots corresponded to the major accumulation of atrazine in roots.Superoxide dismutase,peroxidase and catalase in roots were up-regulated by atrazine exposure at 1 mg/L compared to the control and malondialdehyde content in roots was enhanced when atrazine exposure concentration reached 10 mg/L.These results suggested the exposure and accumulation of atrazine caused oxidative toxicity and antioxidant response in maize.展开更多
文摘At the turn of the year,major state-owned enterprises such as CNPC,Sinopec and CNOOC held their 2025 town hall meetings to review the past year's achievements,summarize experiences,identify gaps,plan new tasks,and set clear directions for efforts in the coming year.
基金supported by the National Basic Research Program of China (No. 2009CB421603)the National Natural Science Foundation of China (No. 40730740,20921063)
文摘Atrazine accumulation,oxidative stress,and defense response in maize seedlings exposed to extraneous atrazine were studied.Accumulation of atrazine in maize increased with increasing exposure concentration.The abscisic acid（ABA） content was positively correlated with the atrazine concentrations in maize roots and shoots（p 0.05）.Hydroxyl radical（.OH） in maize was determined in vivo with electron paramagnetic resonance spectroscopy.Its intensity was positively correlated with atrazine concentration in roots and shoots（p 0.05）,and higher level of.OH generated in roots than in shoots corresponded to the major accumulation of atrazine in roots.Superoxide dismutase,peroxidase and catalase in roots were up-regulated by atrazine exposure at 1 mg/L compared to the control and malondialdehyde content in roots was enhanced when atrazine exposure concentration reached 10 mg/L.These results suggested the exposure and accumulation of atrazine caused oxidative toxicity and antioxidant response in maize.
