Abstract
The growth and phosphate mobilization of control and salt-stressed sesame (Sesamum indicum L.) and pepper (Capsicum annuum L.) plants were examined to ascertain whether or not translocation limits growth of salt-stressed plants. Plants were grown in a complete nutrient solution with and without excess salt. One-half of the control and salt-stressed plants were later transferred to phosphate-free culture solution (“−P” plants). Measurements of growth and phosphate pools in leaves indicated that with or without salinity “−P” plants utilized their phosphate reserves to support growth for a time at rates equaling those of plants supplied with phosphate. The results indicate that mobilization was not limiting for growth of salt-stressed plants.
Defoliation experiments were performed at a developmental stage when the import of assimilates by the youngest expanding leaves could be changed by removing certain source or sink leaves. These experiments also indicated that phloem transport was not limiting for leaf growth on salt-stressed plants.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- BARTLETT G. R. Phosphorus assay in column chromatography. J Biol Chem. 1959 Mar;234(3):466–468. [PubMed] [Google Scholar]
- Nieman R. H., Clark R. A. Interactive effects of salinity and phosphorus nutrition of the concentrations of phosphate and phosphate esters in mature photosynthesizing corn leaves. Plant Physiol. 1976 Feb;57(2):157–161. doi: 10.1104/pp.57.2.157. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Obendorf R. L., Marcus A. Rapid Increase in Adenosine 5'-Triphosphate during Early Wheat Embryo Germination. Plant Physiol. 1974 May;53(5):779–781. doi: 10.1104/pp.53.5.779. [DOI] [PMC free article] [PubMed] [Google Scholar]