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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

In vivo Chlorophyll a Fluorescence in Sodium-Deficient C4 Plants

CPL Grof, M Johnston and PF Bronwell

Australian Journal of Plant Physiology 13(5) 589 - 595
Published: 1986

Abstract

The fluorescence ratio (Fp-FI)/FI gave a consistent value when leaf tissue weights greater than 0.1 g were used and was lower in sodium-deficient than normal C4 plants. Of the group I elements only sodium, irrespective of the salt supplied to deficient cultures, increased the fluorescence ratio to that observed in normal plants. The concentration of sodium required to increase the fluorescence ratio corresponded to the concentration of sodium required to bring about a growth response in Kochia childsii. The application of sodium, either directly onto the leaves or via the culture solution, brought about a rapid and parallel increase in the chlorophyll a/b ratio and the fluorescence ratio in K. childsii.

https://doi.org/10.1071/PP9860589

© CSIRO 1986

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