NOVELTY - A viable plant expressing manganese peroxidase, is new.    USE - The plant is useful for commercial production of recombinant manganese peroxidase in plants. Commercial production of manganese peroxidase has its application in papermaking, waste treatment, bioremediation and others. Large-scale production of manganese peroxidase may also be employed in the treatment of environmental pollutants such as the cleanup of textile mill effluents as well as the bioremediation of dye-contaminated soil. Manganese peroxidase is also useful to remediate liquid or solid waste streams containing organo-halides. It can also be used in the synthesis of phenolic and aromatic amine polymers to help control product yields, molecular weight, molecular weight distribution and polydispersity.    ADVANTAGE - Transgenic plants expressing manganese peroxidase offer the potential to be one of the most economical systems for large-scale production of proteins for industrial, pharmaceutical, veterinary and agricultural use. Advantages of plant systems include the low cost of growing a large biomass, easy scale-up, natural storage organs and established practices for efficient harvesting, storing and processing of the plant. Plants offer advantages over other production systems since some proteins may be used without extensive purification, because for many applications, plant material is used directly as a food source or feed stock. Plant material is also easy to store and transport. In the pulp and paper industry, biological pulping and biological bleaching have the potential of improving the quality of pulp and paper, reducing energy costs and environmental pollution relative to traditional pulping and bleaching operations.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) seeds of the plant;    (2) plant cells expressing manganese peroxidase so that the plant cells are viable;    (3) a method for expressing manganese peroxidase in viable plants;    (4) a method for producing increased levels of manganese peroxidase in plants; and    (5) a method of producing manganese peroxidase in commercial quantities.