Peroxidase activity and lignification in soybean root growth-inhibition by juglone

Abstract

The changes in activities of soluble and cell wall-bound peroxidases and lignin contents in juglone-stressed soybean (Glycine max) seedlings and their relationships with root growth were investigated. Soybean seedlings (3-d-old) were cultivated in nutrient solution supplemented with 0.5 to 25 μM juglone for 24 h. Length and dry mass of roots decreased after 5 to 25 μM juglone treatments. Low juglone concentrations (≤ 1 μM) increased soluble peroxidase activity, while high concentrations (≥ 10 μM) inhibited activities of soluble and cell wall-bound peroxidases. Juglone (≤ 1 μM) did not affect lignin content but highly increased lignification after 5 to 25 μM treatments. Results indicate that lignification may be an important step in root growth reduction of juglone-stressed soybean.

DOI: 10.1007/s10535-006-0029-x

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@article{Bohm2006PeroxidaseAA, title={Peroxidase activity and lignification in soybean root growth-inhibition by juglone}, author={Philip Bohm and Federica Zanardo and M. L. L. Ferrarese and Osvaldo Ferrarese-Filho}, journal={Biologia Plantarum}, year={2006}, volume={50}, pages={315-317} }