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. 1977 Mar;59(3):381–383. doi: 10.1104/pp.59.3.381

Effect of Water Stress on Turgor Differences and 14C-Assimilate Movement in Phloem of Ecballium elaterium1,2

Shahla N Sheikholeslam a, Herbert B Currier a
PMCID: PMC542407  PMID: 16659856

Abstract

The effects of water stress on pressure differences and 14C-assimilate translocation in sieve tubes of squirting cucumber Ecballium elaterium A. Rich were studied. Water stress was induced by transfer of plants from culture solution to a polyethylene glycol 6,000 solution having an osmotic potential of −18.2 atm. Sieve tube turgor, turgor differences between source and sink, and translocation rate were decreased. After 260 minutes of translocation, only 19% of the total fixed 14CO2 had moved out of the leaf, compared to the control value of 62% after the same period of time. The results suggest that water stress slows translocation by lowering sieve tube turgor differences, which are essential for the pressure flow mechanism of conduction.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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