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Plant and Soil

, Volume 81, Issue 2, pp 269–279 | Cite as

The effect of phenylmercuric acetate on salt tolerance in wheat

  • N. M. A. R. Malash
  • T. J. Flowers
Article

Summary

Sodium chloride reduced the growth of the wheat cultivar Armada. Although phenylmercuric acetate (PMA) also reduced the growth under non-saline conditions, in the presence of sodium chloride (100 mM) fresh weight, dry weight and leaf area per plant were promoted particularly when sprayed with PMA at 50 μM. Both net photosynthesis and transpiration were reduced by PMA but the reduction was greater in the absence rather than the presence of NaCl. Furthermore PMA lowered shoot sodium contents and promoted the selectivity for K over Na under saline conditions. Any beneficial effects of PMA are the consequences of improved water relations, lowered ion content and increased leaf area for photosynthesis.

Key words

Growth Net photosynthesis Phenylmercuric acetate Salinity Sodium chloride Transpiration 

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Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers 1984

Authors and Affiliations

  • N. M. A. R. Malash
    • 1
  • T. J. Flowers
    • 1
  1. 1.School of Biological SciencesUniversity of SussexBrightonUK

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