Abstract
The impact of elevated atmospheric [CO2] (e[CO2]) on plants often includes a decrease in their nutrient status, including Ca and Mg, but the reasons for this decline have not been clearly identified. One of the proposed hypotheses is a decrease in transpiration-driven mass flow of nutrients due to decreased stomatal conductance. We used glasshouse and Free Air CO2 Enrichment (FACE) experiments with wheat to show that, in addition to decrease in transpiration rate, e[CO2] decreased the concentrations of Ca and Mg in the xylem sap. This result suggests that uptake of nutrients is not only decreased by reduced transpiration-driven mass flow, but also by as yet unidentified mechanisms that lead to reduced concentrations in the xylem sap.
Original language | English |
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Pages (from-to) | 157-160 |
Number of pages | 4 |
Journal | Journal of Plant Physiology |
Volume | 174 |
Early online date | 27 Oct 2014 |
DOIs | |
Publication status | Published - 1 Feb 2015 |
Keywords
- Calcium
- Elevated CO
- Magnesium
- Transpiration
- Xylem sap
ASJC Scopus subject areas
- Physiology
- Agronomy and Crop Science
- Plant Science