VAN DER Kooij T A W, DE Kok L J, Haneklaus S, Schnug E
Dept. of Genetics, University of Groningen, P.O. Box 14, 9750 AA, Haren, The Netherlands.
lDept. of Plant Biology, University of Groningen, P.O. Box 14, 9750 AA, Haren, The Netherlands.
New Phytol. 1997 Jan;135(1):101-107. doi: 10.1046/j.1469-8137.1997.00619.x.
Arabidopsis thaliana (L.) Heynh. was exposed to various concentrations of SO during almost the entire life cycle. No negative effects of SO on shoot biomass production were observed. There was a linear relation between the deposition of SO and the atmospheric SO concentration. Sulphur accumulated substantially in the shoots upon SO exposure. SO was either oxidized to sulphate or converted into extra organic sulphur compounds in a sulphate to organic sulphur ratio of 3:1, independently of the atmospheric SO concentration. Exposure to SO resulted in an increase in water soluble non-protein sulphydryl content and a slight increase in the amount of glucosinolates, but both of these play a minor role as sinks for the excess sulphur. The ratio of total nitrogen to total sulphur decreased upon SO , exposure as a result of the increased sulphate content. The organic nitrogen to organic sulphur ratio did not change upon SO exposure, indicating no changes in the composition of sulphur-containing compounds.
拟南芥（Arabidopsis thaliana (L.) Heynh.）在几乎整个生命周期中都暴露于不同浓度的二氧化硫（SO）中。未观察到二氧化硫对地上部生物量生产有负面影响。二氧化硫的沉积与大气中二氧化硫浓度之间存在线性关系。暴露于二氧化硫时，硫在地上部大量积累。二氧化硫要么被氧化为硫酸盐，要么以3:1的硫酸盐与有机硫比例转化为额外的有机硫化合物，这与大气中二氧化硫浓度无关。暴露于二氧化硫会导致水溶性非蛋白巯基含量增加，芥子油苷含量略有增加，但这两者作为过量硫的汇都只起次要作用。由于硫酸盐含量增加，暴露于二氧化硫后总氮与总硫的比例降低。暴露于二氧化硫后有机氮与有机硫的比例没有变化，表明含硫化合物的组成没有变化。
