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    Author(s): Rakesh MinochaWalter C. Shortle; Daniel J. Jr. Coughin; Subhash C. Minocha
    Date: 1996
    Source: Canadian Journal of Forest Research. 26: 550-559.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (771.93 KB)

    Description

    The influence of age of red spruce (Picea rubens Sarg.) cell suspensions on aluminum (Al) effects was studied by adding AICI3 (0.2, 0.5, and 1.0 mM) to the media on each day of a 7-day culture period and analyzing for changes in total cell mass, polyamines, arginine decarboxylase activity, and inorganic ions after 24 h of incubation. The effective concentrations of monomeric Al in the medium were found to be approximately 0.09, 0.23, and 0.48 mM, respectively. All levels of Al inhibited growth and increased cellular putrescine levels and arginine decarboxylase activity. Spermidine and spermine levels were either slightly elevated or not affected by Al. Cellular content of Ca, Mg, Mn, and K decreased, while Al and P increased in Al-treated cells. Aluminum effects, in general, were dose dependent. Since the response to 24 h incubation with Al was generally independent of culture age, 3-day-old cultures were selected to further study short- and long-term (4 h to 11 days) effects of Al. Cellular putrescine levels remained elevated in the Al-treated cells for the entire duration of the experiment. There was a sharp dose-dependent increase in spermine levels by the 7th day of incubation. After the initial decrease, Al treatments for longer than 2 to 4 days did not cause consistent effects on Ca, Mn, and Mg levels. Potassium decreased and P and Al increased in a dose-dependent manner over the 11-day culture period.

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    Citation

    Minocha, Rakesh; Shortle, Walter C.; Coughin, Daniel J. Jr.; Minocha, Subhash C. 1996. Effects of aluminum on growth, polyamine metabolism, and inorganic ions in suspension cultures of red spruce (Picea rubens). Canadian Journal of Forest Research. 26: 550-559.

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