Abstract
Barley (Hordeum vulgare L. cv. Minorimugi) plants were cultured in iron (Fe)-deficient nutrient solutions at three levels (0.25, 0.025, and 0.0025 μM) of manganese (Mn). Iron-deficient plants with high Mn (0.25 μM) had brown spots on older leaves and stems characteristic of Mn toxicity. In the nutrient solution at 0.0025 μM Mn, the younger leaves had typical symptoms of Mn deficiency. Iron-deficient plants with 0.025 μM Mn had shoot Mn concentration statistically similar to Fe-sufficient plants with 0.25 μM Mn. Tissue Fe and Mn concentrations were reciprocally related in shoots and roots of plants grown in 0.25 μM Mn with and without Fe. The Mn concentration of Fe-deficient plants decreased with decreasing Mn concentrations in the nutrient solution. In contrast, the Mn levels in the nutrient solution did not significantly affect the Fe concentrations of Fe-deficient plants with identical Fe deficiency symptoms. The highest level of phytosiderophore (PS) released from roots of Fe-deficient plants occurred with 0.025 μM Mn and the least with 0.0025 μM Mn. A deficiency of Fe decreased the translocation of Fe and Cu from roots to shoots, but had little or no effect on the translocation of Mn and Zn.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.