Changes in the abscisic acid content of oat leaves during senescence.

  title={Changes in the abscisic acid content of oat leaves during senescence.},
  author={Shimon Gepstein and Kenneth V. Thimann},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={77 4},
To investigate the possibility that experimental promotion of retardation of the senescence of oat leaves may be mediated by abscisic acid (AbA), determinations of AbA were made in leaves senescing under different conditions. The extracts were subjected to thin-layer chromatography, the spots were eluted and esterified, and the AbA was determined by gas chromatography (overall recovery, about 75%). In darkness, where the stomata are closed and senescence is rapid, the concentration of AbA… CONTINUE READING


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