Diurnal Ion Fluctuations in the Mesophyll Tissue of the Crassulacean Acid Metabolism Plant Mesembryanthemum crystallinum
- 30 November 1979
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 64 (6) , 919-923
- https://doi.org/10.1104/pp.64.6.919
Abstract
Both laboratory- and field-grown M. crystallinum plants exhibited large scale diurnal ion fluctuations. In mesophyll tissue, K and Na levels varied in conjunction with acid levels while chloride levels varied in opposition. Thus, dark CO2 fixation in this crassulacean acid metabolism species seems analogous to the common plant process of malate synthesis to balance cation surplus. Na levels in the epidermis appeared to fluctuate in opposition to those in the mesophyll. Inorganic cations may cycle between mesophyll and epidermal tissue to balance malate accumulation and to produce stomatal opening in the dark.Keywords
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