Light-dependent Emission of Hydrogen Sulfide from Plants

作者：Lloyd G. Wilson, Ray A. Bressan, Philip Filner · 发表于：PLANT PHYSIOLOGY · 年份：1978 · DOI：10.1104/pp.61.2.184 · 被引用次数：204 · 研究领域：Plant responses to elevated CO2、Atmospheric chemistry and aerosols、Isotope Analysis in Ecology

With the aid of a sulfur-specific flame photometric detector, an emission of volatile sulfur was detected from leaves of cucumber (Cucumis sativus L.), squash and pumpkin (Cucurbita pepo L.), cantaloupe (Cucumis melo L.), corn (Zea mays L.), soybean (Glycine max [L.] Merr.) and cotton (Gossypium hirsutum L.). The emission was studied in detail in squash and pumpkin. It occurred following treatment of the roots of plants with sulfate and was markedly higher from either detached leaves treated via the cut petiole, or whole plants treated via mechanically injured roots. Bisulfite elicited higher rates of emission than sulfate. The emission was completely light-dependent and increased with light intensity. The rate of emission rose to a maximum and then declined steadily toward zero in the course of a few hours. However, emission resumed after reinjury of roots, an increase in light intensity, an increase in sulfur anion concentration, or a dark period of several hours.The emission was identified as H(2)S by the following criteria: it had the odor of H(2)S; it was not trapped by distilled H(2)O, but was trapped by acidic CdCl(2) resulting in the formation of a yellow precipitate, CdS; it was also trapped by base and the contents of the trap formed methylene blue when reacted with N,N-dimethyl-p-phenylenediamine and Fe(3+).H(2)S emission is not the cause of leaf injury by SO(2), since bisulfite produced SO(2) injury symptoms in dim light when H(2)S emission was low, while sulfate ...