Lemna obscura

Lemna obscura fronds contain high quantities of anthocyanln that are extractable by soaking the fronds In 0.1 M HC1. L. obscura growth in the culture dish bloassay was similar to that of L. minor and appeared to be more sensitive to low levels of allelochemlcals. Anthocyanln concentration was affected by low concentrations of salicylic acid (Table VIII). Final frond number and dry weight were consistently reduced by 100 pM and 500 pM concentrations of salicylic acid whereas anthocyanln formation was inhibited by 50 UM concentrations of salicylic acid and stimulated by 0.5 VM. 

TABLE VIII. Effect of Salicylic Acid (SA) on Growth and Anthocyanln Content In Lemna obscura L. Cultured In 24-well Tissue Culture Cluster Dishes... 

Certain emergent aquatic plants, especially hydrilla (Hydrilla verticillata) and duckweed (Lemna obscura), removed 97 to 98% of all soluble lead from solution in the vicinity of a lead battery site in Tampa, Florida, suggesting that phytoremediation may be feasible as the basis of a lead removal technology (Gallardo et al. 1999). 

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