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作 者:仪美芹[1] 姜兴印[2] 李学锋[3] 李召虎[1]
机构地区:[1]中国农业大学农学与生物技术学院,北京100193 [2]山东农业大学植物保护学院,泰安271018 [3]中国农业大学理学院,北京100193
出 处:《植物保护》2010年第2期71-74,共4页Plant Protection
基 金:国家科技支撑计划项目(2006BAD08A03)
摘 要:本论文以70%吡虫啉水分散粒剂为研究药剂,以番茄为研究试材,通过室内盆栽法研究了不同剂量的吡虫啉对番茄植株生长量的影响,以及对番茄体内过氧化氢酶(CAT)、超氧化物歧化酶(SOD)和番茄根系活力进行了测定。结果表明70%吡虫啉水分散粒剂分别以有效成分用量1.0、1.5、2.5、3.0mg/株和5.0mg/株5个剂量处理番茄幼苗,在处理后30d测定番茄展开叶片数、株高、主根长、地上和地下部分鲜重,随着药剂浓度的增加,各测定指标呈现先升高后降低的变化趋势,其中以2.5mg/株剂量影响最大,与清水对照比差异显著。测定不同浓度的吡虫啉处理番茄后30d叶片及根系中CAT、SOD的活性和根系活力,结果表明不同剂量的吡虫啉均对番茄叶片和根系的CAT、SOD活性和根系活力有一定的影响,其效应并不是随药剂浓度的增加而增加,与清水对照比以2.5mg/株剂量各生理指标活性增加最大,超过2.5mg/株的剂量有下降趋势。The physiology and biochemical characteristics and growth of tomatoes treated with different dosages of imidacloprid. Catalase (CAT), superoxide dismutase (SOD) and root activity of tomato were investigated. The number of leaves, plant height, root length, fresh weight of overground and underground parts were measured 30 days after treatments with 0, 1.0, 1.5, 2.5, 3.0, 5.0 mg per plant imidacloprid. The results showed that all of the values measured showed an increase at first and then a decrease, and at the dosage of 2.5 mg/plant, all of the values tested were the highest. The results indicated that imidacloprid could promote the growth of plants and the treatment of 2.5 mg imidacloprid per plant resulted in the most significant effects. The specific activities of CAT and SOD in tomato leaves and roots were also investigated in the laboratory. The results showed that activities of CAT and SOD in leaves and roots at all of the dosages treated were enhanced. The root activity of plants was also improved. The efficacy of 2.5 mg imidacloprid / plant was the highest among all of the dosages treated.
关 键 词:吡虫啉 番茄 过氧化氢酶(CAT) 超氧化物歧化酶(SOD) 根系活力
分 类 号:S311[农业科学—作物栽培与耕作技术]
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