Role of Calcium on Phenolic Compounds and Enzymes Related to Lignification in Soybean (Glycine max L.) Root Growth |
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Authors: | Aline Finger Teixeira Aneliz de Bastos Andrade Osvaldo Ferrarese-Filho Maria de Lourdes Lucio Ferrarese |
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Institution: | (1) Laboratory of Plant Biochemistry, Department of Biochemistry, University of Maringá, Av. Colombo, 5790, 87020-900 Maringá, PR, Brazil |
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Abstract: | Changes in soluble and cell wall bound peroxidases activities, phenylalanine ammonia-lyase activity and phenolic compounds
and lignin contents in roots of calcium-treated soybean (Glycine max (L.) Merr.) seedlings and their relationships with root growth were investigated. Three-day-old soybean seedlings were cultivated
in nutrient solution with or without 0.025–5.0 mM calcium for 24 h. In general, length and fresh and dry weights of roots
increased, while activities of enzymes (soluble and cell-wall peroxidases and phenylalanine ammonia-lyase) and phenolic compounds
and lignin contents decreased against calcium concentrations. In the absence of calcium, phenylalanine ammonia-lyase and peroxidases
activities increased by accumulating phenolic compounds and lignin due to restricted growth of roots. Enhanced calcium supply
reduced the production of phenolic compounds and lignification due to low phenylalanine ammonia-lyase and peroxidases activities,
reinforcing the essential role of calcium to improve the soybean root growth. |
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Keywords: | Calcium Lignin Phenolic compounds Root growth Soybean |
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