QUINONE INHIBITION OF CHLOROPLAST EXCITATION TRANSFER

拟议的研究调查了取代的行为。 醌类化合物作为植物体内叶绿素荧光的抑制剂。 这种荧光抑制表明，苯二酚的作用是 光合作用除草剂抑制植物体内正常运转 将光吸收到专业领域，在这些领域中 光合作用开始了。这些被取代的人的作用地点 喹酮类化合物作为荧光猝灭剂还不是很清楚。这个 拟议项目的目标是确定哪些结构 和取代苯二酚的物化参数， 增强相互作用的萘醌类化合物和蒽醌类化合物 有光合作用的膜。对苯二酚膜的检测 苯二酚诱导的叶绿素的相互作用和测量 将使叶绿体中的荧光猝灭。相关性 在对苯二酚的结构性质和实验上- 然后测量的叶绿素荧光参数将是 调查过了。这些相关性将决定 抑制作用的化学-物理性质和帮助 阐明了荧光猝灭的可操作机制。 该数据还将使抑制活性的预测成为可能 在其他生物系统中的外源性苯二酚。特别是， 调查将使人们对这种化学物质和 合成的苯二酚的物理性质可增强其 抑制内源性苯二酚的功能的能力，内源性苯醌的作用是 各种电子传输链中的载体。

The proposed research investigates the action of substituted quinones as inhibitors of in vivo chlorophyll fluorescence in plants. Such fluorescence inhibition reveals that quinones act as photosynthetic herbicides to inhibit the normal transfer of absorbed light to specialized domains where the process of photosynthesis is initiated. The site of action of these substituted quinones as fluorescence quenchers is not clearly known. The objective of the proposed project is to determine those structural and physicochemical parameters of substituted benzoquinones, naphthoquinones, and anthraquinones that enhance interaction with photosynthetic membranes. To examine quinone-membrane interactions, measurements of quinone-induced chlorophyll fluorescence quenching in chloroplasts will be made. Correlations between quinone structural properties and experimentally- measured chlorophyll fluorescence parameters will then be investigated. These correlations will determine the relation of chemical-physical properties to inhibitory action and aid in the elucidation of the operable mechanism of fluorescence quenching. The data will also enable the prediction of the inhibitory activity of extrinsic quinones in other biological systems. In particular, the investigation will yield an understanding of the chemical and physical properties of synthetic quinones that enhance their ability to inhibit the function of endogenous quinones which act as carriers in a diverse range of electron-transport chains.