Genotypic differences in manganese efficiency: field experiments with␣winter barley (Hordeum vulgare L.)

Abstract

Eight different winter barley genotypes were grown in a plot experiment in northern Denmark, on soil where Mn deficiency had been previously demonstrated, to assess field performance and grain yield under two treatments: with foliar Mn fertilisation and without foliar Mn fertilisation. A high Mn efficiency was demonstrated for two of the genotypes and a low Mn efficiency was observed for one of the genotypes in three consecutive years; highly variable results were obtained for other genotypes. Mn efficiency based on grain yields could not be related to whole shoot Mn concentration, biomass or Mn uptake at various vegetative growth stages. Chlorophyll a fluorescence analysis was able to differentiate between the two Mn treatments up to 7 weeks after the last Mn application, whereas Mn concentrations, shoot biomass and Mn accumulation could not. It was not possible to fully alleviate Mn deficiency by repeated foliar spraying on the control plots. Given the growing conditions at the trial site and the low Mn in plant tissue, it is possible that Mn deficiency was extreme enough that Mn efficiency mechanisms broke down.Abbreviations: Mn -manganese; GS -growth stage; F o -minimum fluorescence; F m -maximum fluorescence; F v -variable fluorescence.

Root-Specific Reduction of Cytokinin Causes Enhanced Root Growth, Drought Tolerance, and Leaf Mineral Enrichment in Arabidopsis and Tobacco

“…Mn deficiency is prevalent in large parts of the agricultural soils of Scandinavia, China, and tropical areas (Marschner, 1995;Hebbern et al, 2005;Yang et al, 2007), and Zn deficiency is widespread in Asian and Australian soils (Grotz and Guerinot, 2006;Broadley et al, 2007). Increased leaf nutrient accumulation may help the plant to maintain efficient photosynthesis, metabolism, and, thus, biomass production during episodes of nutrient deficiency.…”

The Effects of Fe, Mn and Zn Foliar Application on Yield, Ash and Protein Percentage of Forage Sorghum in Climatic Condition of Esfahan

“…Kakade et al (2009) noted that the application of Fe and Zn give maximum number of flowers, weight and yield of flowers as compared to control. Hebbern et al (2005), Mirzapor and Khoshgoftar (2006), Chatterjee and Khurana (2007), Fernandes et al (2007) and Wissuwa et al (2008) concluded the positive effects of Zn and Fe on yield, yield components and chemical compositions of plant. Magnesium (Mg) is an essential macro-element for plant growth (Trolove et al, 2008).…”

Manganese Efficiency in Barley: Identification and Characterization of the Metal Ion Transporter HvIRT1

“…Large differences have been observed among barley (Hordeum vulgare) genotypes (Graham et al, 1983;Hebbern et al, 2005), but even though Mn efficiency has been investigated for decades, the exact physiological and molecular bases for the tolerance to low Mn 21 availability remain unknown (Graham, 1988;Ascher-Ellis et al, 2001). However, Pedas and coworkers (2005) identified a high-affinity transport system mediating Mn 21 influx at concentrations up to 130 nM and showed that the Mn-efficient genotype Vanessa had a transport capacity (V max ) almost four times higher than the Mn-inefficient genotype Antonia.…”