论文部分内容阅读
应用同位素示踪技术研究了~(14)C-三唑酮在小麦2～3叶期幼苗上的吸收分布和影响因素。结果表明,根部给药后2～216h,小麦幼苗根部放射性相对强度由54.0％下降为21.7％;在幼苗残存种子上的放射性相对强度由37.5％上升为56.6％;~(14)C-三唑酮向顶传导速度很快,在叶片中的积累与根部给药时间呈正相关,由8.5％上升为21.7％。放射性自显影证明,根部给药后144h,~(14)C-三唑酮可以内吸传导到整个小麦植株。小麦幼苗根部吸收三唑酮属于被动扩散的物理过程,没有膜蛋白和ATP酶的参与;蔗糖、亮氨酸、赖氨酸和谷氨酸对吸收无明显影响。环境pH3～7时能正常吸收,pH8时对吸收产生一定抑制作用。故可推断土壤环境保持中性偏酸有利于小麦种苗对种衣剂中三唑酮成分的吸收。
The isotope tracing technique was used to study the absorption distribution and influencing factors of ~ (14) C-triadimefon on wheat seedlings at 2 ~ 3 leaf stage. The results showed that the relative radioactivity of roots in wheat seedlings decreased from 54.0% to 21.7% at 2 ~ 216 h after root application, and increased from 37.5% to 56.6% The conduction of ketones to the top was very fast, and the accumulation in leaves was positively correlated with the time of root administration, from 8.5% to 21.7%. Autoradiography demonstrated that ~14 C-triadimefon could be transported to the whole wheat plant by 144 h after root application. The absorption of triadimefon at the root of wheat seedlings is a passive process of passive diffusion without membrane protein and ATPase. Sucrose, leucine, lysine and glutamic acid have no obvious effect on absorption. Environmental pH3 ~ 7 can be normal absorption, pH8 when the absorption has a certain inhibitory effect. Therefore, it can be inferred that the neutral acidification in the soil environment is beneficial to the absorption of triadimefon in wheat seedlings.