Abstract
Cryo-microprobe analysis of quench-frozen fronds of a Zn-tolerant clone of Lemna minor exposed to a high level of Zn (300 μM) showed the presence of cellular deposits consisting of Zn, Mg, K and P or Zn, K and P (Zn phytate). The same Zn-tolerant clone of Lemna minor, when exposed to a high level of Cd (30 μM), showed the presence of globular deposits consisting of Cd, K and P in mature fronds, but the immature cells of the enclosed daughter fronds contained relatively large deposits with Cd and S as the main components (Cd-phytochelatin?). Selection for Zn tolerance in a population of Lemna minor was easily achieved but selection for Cd tolerance has so far not been successful. The Zn-tolerant clone also tolerates high levels of phosphate.
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Van Steveninck, R.F.M., Van Steveninck, M.E. & Fernando, D.R. Heavy-metal (Zn, Cd) tolerance in selected clones of duck weed (Lemna minor). Plant Soil 146, 271–280 (1992). https://doi.org/10.1007/BF00012021
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DOI: https://doi.org/10.1007/BF00012021