Subjects
-Abstract
A common belief is that plant roots absorb cations from soil solution experiments with corn (Zea mays L.) using K/Rb ratio to evaluate the source of K and Rb absorbed indicated that the plant roots absorbed these ions in the ratio of exchangeable K and Rb. The objective of this research was to study the source of K and Rb absorbed from soil by Jerusalem artichoke (Helianthus tuberosus L.) roots since they do not have root hairs and this may influence the uptake mechanism. Jerusalem artichoke absorbed K/Rb with a ratio which was intermediate between the ratio of exchangeable K and Rb and the ratio of these cations in solutions. In comparison with corn, Jerusalem artichoke absorbed K at one-third the rate, but absorbed water three times faster so that mass flow contributed a greater proportion of K absorbed by Jerusalem artichoke than that by corn. This, rather than differences in root hairs may be the reason for the observed differences in K uptake between corn and Jerusalem artichoke.
DOI
10.21608/asejaiqjsae.2015.2736
Keywords
Selectivity coefficient, diffusion coefficient, exchange cations, solution cations, ion influx kinetics, Helianthus tuberosus L
Authors
First Name
Said Abbas Mohammed
MiddleName
-Affiliation
Soil and Water Sci. Dept., Faculty of Agriculture in Assiut,
Al-Azhar University
Email
-City
-Orcid
-Article Issue
January-March
Link
https://asejaiqjsae.journals.ekb.eg/article_2736.html
Detail API
https://asejaiqjsae.journals.ekb.eg/service?article_code=2736
Publication Title
Alexandria Science Exchange Journal
Publication Link
https://asejaiqjsae.journals.ekb.eg/
MainTitle
Effect of Potassium/Rubidium Ratio on the Uptake of Potassium by Jerusalem Artichoke Roots