Botanisches Institut der Universität zu Köln, Gyrhofstraße 15, D-5000, Köln 41, Federal Republic of Germany.
Planta. 1979 Oct;147(1):57-62. doi: 10.1007/BF00384591.
Sulfur reduction in tobacco plants is a light-enhanced process that predominantly takes place in the leaves rather than the roots. The amount of sulfate reduced in mature leaves can exceed their own requirement and enables an export of reduced sulfur, both basipetal toward the roots as well as acropetal toward the growing parts of the stem. Evidence is presented that translocation of reduced sulfur toward the roots occurs in the phloem. TLC and paper chromatography reveal that glutathione is the main transport form of reduced sulfur in tobacco plants; 67-70% of reduced (35)S was confined to glutathione, 27-30% to methionine, and 2-8% to cysteine.
烟草植物中的硫还原是一个光增强的过程，主要发生在叶片中，而不是根部。成熟叶片中还原的硫酸盐量超过其自身的需求，并能使还原硫输出，既向根部的向基运输，也向茎生长部分的向顶运输。有证据表明，还原硫向根部的转移发生在韧皮部中。TLC 和纸层析显示，谷胱甘肽是烟草植物中还原硫的主要运输形式；67-70%的还原（35）S 局限于谷胱甘肽，27-30%局限于蛋氨酸，2-8%局限于半胱氨酸。
