A bacterial isolate identified as Xanthomonas sp. proved to be ligninolytic due to its ability to degrade 14C-labeled dehydropolymers of coniferyl alcohol (DHP) and [14C]lignocellulose complexes from corn plants (Zea mays). Several parameters of ligninolysis were evaluated and it was shown that
Ten day old mays seedlings (Zea mays L., var. Aligreen) cultured in hydroponic medium were treated by toxic amounts of copper (50 and 100 microM of CuSO4) during seven days. Cupric stress induced changes in growth parameters: The matter productions were more reduced in roots than in shoots. Also, a
The effect of copper excess on growth, H2O2 level and peroxidase activities were studied in maize shoots. Ten-day-old seedlings were cultured in nutrient solution that contained Cu2+ ions at various concentrations (50 and 100 microM) for seven days. High concentrations of Cu2+ ions caused
A glutathione S-transferase (GST) enzyme from corn (Zea mays L. Pioneer hybrid 3906) that is active with p-coumaric acid and other unsaturated phenylpropanoids was purified approximately 97-fold and characterized. The native enzyme appeared to be a monomer with a molecular mass of approximately 30
Tricin was recently discovered in lignin preparations from wheat (Triticum aestivum) straw and subsequently in all monocot samples examined. To provide proof that tricin is involved in lignification and establish the mechanism by which it incorporates into the lignin polymer, the 4'-O-β-coupling
Plant laccases catalyse the oxidation of monolignols in lignification, a process reinforcing the cell wall of many different cell types that provide mechanical support, nutrient transportation and defence against pathogens in plants1. The isozymes display a broad range of substrate
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