Summary
The effects of added silicon on the absorption and transport of manganese in perennial ryegrass (an accumulator of Si) were determined and compared with those found in white clover (which has restricted Si uptake). The plants were grown in flowing solution culture in two experiments with Si in the nutrient solution maintained at 0, 10 or 20 mgl−1 and Mn at 0.005 mgl−1. By the final harvests, the plants contained concentrations of both Mn and Si that were comparable to those found in field-grown plants.
In common with other findings, white clover had very much lower concentrations of Si in both shoots and roots than did ryegrass but there was no effect of Si treatment on the growth of either species. In both species, the concentrations of Mn were initially greater in roots than in shoots, but values in both plant parts decreased with time and by the final harvests, were similar. The rates of absorption of Mn by roots and its subsequent transport to shoots were also similar in both species. In contrast to findings for other species in other studies based on conventional solution culture, there was no effect of added Si on either absorption or transport of Mn in clover or ryegrass. It was therefore concluded that any effect of Si on the behaviour of Mn in plants must result from changes in distribution and partitioning within leaf tissues and cells.
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Jarvis, S.C., Jones, L.H.P. The absorption and transport of manganese by perennial ryegrass and white clover as affected by silicon. Plant Soil 99, 231–240 (1987). https://doi.org/10.1007/BF02370870
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DOI: https://doi.org/10.1007/BF02370870