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An Electron Microscope Study of Silver Nitrate Reduction in Leaf Cells

W. V. Brown, H. Mollenhauer and C. Johnson
American Journal of Botany
Vol. 49, No. 1 (Jan., 1962), pp. 57-63
Stable URL: http://www.jstor.org/stable/2439389
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
An Electron Microscope Study of Silver Nitrate Reduction in Leaf Cells
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Abstract

As reported earlier in many studies, AgNO3 is reduced quickly by the living chloroplasts of angiosperms. Electron microscope study has resolved the conflict of opinions concerning the exact location of the silver particles. Reduction of AgNO3, as indicated by location of silver particles, occurs within the chloroplasts but not within the grana or pure stroma; it appears to be associated with the intergranal (also called stroma) lamellae. Silver particles are formed also at the surfaces of the cell wall, both in the middle lamella and at the inner surface, and also within plasmodesmata. It is concluded that chlorophyll is probably not involved directly in the reduction. There is some slight support for the popular hypothesis that ascorbic acid may be the chief reducing agent.

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