Effect of P and Mn on growth response and uptake of Fe, Mn and P by sorghum

Kuo, S and Mikkelsen, D S (1981) Effect of P and Mn on growth response and uptake of Fe, Mn and P by sorghum. Plant and Soil , 62 (1). pp. 15-22.

[img] PDF - Published Version
Restricted to ICRISAT researchers only

Abstract

The effects of P and Mn on growth response and uptake of Fe, Mn and P by grain sorghum were investigated using nutrient culture. High P and Mn concentrations in solution (greater than 40 and 1 mg/l for P and Mn, respectively) markedly reduced plant height and shoot and root dry weight of 4-week-old sorghum plants. High Mn concentrations in solution increased the concentrations of Mn and P in shoot tissue and uptake of Mn, but depressed the uptake of P. High levels of P enhanced Mn uptake by sorghum and accentuated Mn toxicity at low Mn levels. The tissue Fe and total uptake of Fe were both reduced markedly by the high levels of P and Mn concentrations in solution. The increases of P, Mn and Fe concentrations in root tissue with a concomitant decrease of Fe in shoots suggested that the translocation of Fe from roots to shoots was hindered under high P and Mn conditions. Since coating occurred on root surfaces and intensified with increasing Mn concentrations in the substrate, part of the reduction of Fe in shoots could be attributed to the formation of high valent manganese oxides on the root surfaces which may retain Fe and reduce its absorption by sorghum.

Item Type: Article
Author Affiliation: University of California, Davis, CA
Subjects: Plant Production
Divisions: Sorghum
Depositing User: Library ICRISAT-InfoSAT
Date Deposited: 23 Feb 2012 14:17
Last Modified: 23 Feb 2012 14:17
Official URL: http:/dx.doi.org/10.1007/BF02205021
URI: http://eprints.icrisat.ac.in/id/eprint/3166

Actions (login required)

View Item View Item
EPrints Logo
eprints is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.