Botanical Institute, University of Karlsruhe, D-7500, Karlsruhe, Federal Republic of Germany.
Photosynth Res. 1980 Mar;1(1):29-43. doi: 10.1007/BF00020073.
Photosystem II-herbicides (bentazone*, diuron) not only block photosynthetic electron transport, but have additional effects on the cell metabolism of Raphanus seedlings. They induce the formation of shade-type chloroplasts with a different ultrastructure and prenyllipid composition. This is shown by higher grana stacks as well as by higher chlorophyll b and lutein amounts with reference to chlorophyll a, and lower levels of the plastidic prenylquinones (plastoquinone, phylloquinone, α-tocoquinone) and β-carotene as compared to the controls.The two herbicides bentazone and diuron change the labelling pattern of the chloroplast pigments from (3)H-mevalonic acid and 2-(14)C-acetate and also reduce the accumulation of anthocyanin (pelargonidin), which is a further indication of a shade-type growth response. The level of ubiquinone, an indicator for mitochondrial activity, is, however, increased.
光系统 II-除草剂(苯达松*、敌草隆)不仅能阻断光合作用电子传递,对萝卜幼苗的细胞代谢还有其他影响。它们诱导形成具有不同超微结构和类异戊二烯脂类组成的阴生型叶绿体。这表现为更高的基粒垛叠,以及相对于叶绿素 a 更高的叶绿素 b 和叶黄素含量,以及更低水平的质体类异戊二烯醌(质醌、叶绿醌、α-生育醌)和β-胡萝卜素,与对照相比。两种除草剂苯达松和敌草隆改变了叶绿体色素的标记模式(3)H-甲羟戊酸和 2-(14)C-乙酸,并减少了花色素苷(天竺葵色素)的积累,这进一步表明是一种阴生型生长反应。然而,作为线粒体活性指标的泛醌水平增加。