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Diurnal variations of potassium content in lucerne plants
- Source :
- Biologia Plantarum. 29:221-229
- Publication Year :
- 1987
- Publisher :
- Institute of Experimental Botany, 1987.
-
Abstract
- Diurnal changes in K content in leaf blades, petioles, stems and roots of eleven lucerne genotypes were followed. Significant positive correlations between changes in K content in petioles and upper half of stems and significant negative correlations between changes of K content in leaf blades and lower half of stems reflected rapid K movement. The velocity — up to 60 μmol g−1 (f.m.)h−1 — of changes in K content from leaf blades to lower part of stems and the other way round showed that long distance phloem transport occurred. Only moderate increase of K content contemporarily took place in roots. When total K amount in the whole plant was calculated then K uptake alternatively with K release were noticed during the day. Average K release reached 1.48 μmol g−1 (f.m.) h−1. The rate of K movement correlated with irradiance and physiological activity of plants. The time course of K movement was uniform in plants of the same strain and it differed partially in different strains.
Details
- ISSN :
- 15738264 and 00063134
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Biologia Plantarum
- Accession number :
- edsair.doi...........9324134035242cd6ee2ba324be105af4
- Full Text :
- https://doi.org/10.1007/bf02876834