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Stomatal closure in response to xanthoxin and abscisic acid

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Summary

The stomata of detached leaves of Commelina communis L., Hordeum vulgare L., Zea mays L., Vicia faba L., Phaseolus vulgaris L. and Xanthium strumarium L. closed when xanthoxin (XAN) was added to the transpiration stream. XAN was approximately half as active as (+)-abscisic acid (ABA) at an equivalent concentration. XAN, like ABA, sensitized stomata of Xanthium strumarium to CO2. In contrast to ABA, XAN was ineffective in closing stomata of isolated epidermal strips of C. communis or V. faba. This may be because XAN added to the transpiration stream is converted to ABA during passage from the xylem to the epidermis.

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Abbreviations

ABA:

Abscisic acid

XAN:

xanthoxin

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Author notes

  1. Richard D. Firn

    Present address: Department of Biology, University of York, York, UK

Authors and Affiliations

  1. MSU/ERDA Plant Research Laboratory, 48824, East Lansing, Michigan, USA

    Klaus Raschke, Richard D. Firn & Margaret Pierce

Authors
  1. Klaus Raschke
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  2. Richard D. Firn
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  3. Margaret Pierce
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Raschke, K., Firn, R.D. & Pierce, M. Stomatal closure in response to xanthoxin and abscisic acid. Planta 125, 149–160 (1975). https://doi.org/10.1007/BF00388701

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  • DOI: https://doi.org/10.1007/BF00388701

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