Effect of Water Stress on Turgor Differences and 14C-Assimilate Movement in Phloem of Ecballium elaterium
- 1 March 1977
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 59 (3) , 381-383
- https://doi.org/10.1104/pp.59.3.381
Abstract
The effects of water stress on pressure differences and 14C-assimilate translocation in sieve tubes of squirting cucumber E. elaterium A. Rich were studied. Water stress was induced by transfer of plants from culture solution to a polyethylene glycol 6000 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 min 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. Apparently water stress slows translocation by lowering sieve tube turgor differences, which are essential for the pressure flow mechanism of conduction.This publication has 7 references indexed in Scilit:
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