| L-DOPA increases lignification associated with Glycine max root growth-inhibition. | |
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MedLine Citation:
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PMID: 17195115 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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L-3,4-dihydroxyphenylalanine (L: -DOPA), an allelochemical exuded from the roots of velvet bean [Mucuna pruriens (L.) DC. var. utilis], presents a highly inhibitory action to plant growth. The effects of L-DOPA on phenylalanine ammonia-lyase (PAL, EC 4.3.1.5) and peroxidase (POD, EC 1.11.1.7) activities, and phenolic compound and lignin content in soybean [Glycine max (L.) Merr.] roots were investigated to determine the possible phytotoxic mechanism. Three-day-old seedlings were cultivated in half-strength Hoagland nutrient solution (pH 6.0), without or with 0.1 to 1.0 mM L-DOPA in a growth chamber (25 degrees C, 12-hr light to 12-hr darkness photoperiod, irradiance of 280 micromol m-2 s-1) for 24 hr. In general, the length, fresh weight, and dry weight of the roots decreased, whereas PAL and POD activities and phenolic compound and lignin content increased after L-DOPA treatments. Results showed the susceptibility of soybean to L-DOPA and reinforce the role of this nonprotein amino acid as a strong allelochemical. The present findings also suggest that L-DOPA-induced inhibition in soybean roots may be because of a cell wall stiffening process related to the formation of cross-linking between cell wall polymers linked to lignin production. |
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Authors:
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Anderson Ricardo Soares; Maria de Lourdes Lucio Ferrarese; Rita de Cássia Siqueira; Franciele Mara Lucca Zanardo Böhm; Osvaldo Ferrarese-Filho |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-12-29 |
Journal Detail:
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Title: Journal of chemical ecology Volume: 33 ISSN: 0098-0331 ISO Abbreviation: J. Chem. Ecol. Publication Date: 2007 Feb |
Date Detail:
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Created Date: 2007-01-17 Completed Date: 2007-05-21 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 7505563 Medline TA: J Chem Ecol Country: United States |
Other Details:
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Languages: eng Pagination: 265-75 Citation Subset: IM |
Affiliation:
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Laboratory of Plant Biochemistry, Department of Biochemistry, University of Maringá, Av. Colombo, 5790, 87020-900, Maringá, PR, Brazil. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Levodopa
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pharmacology* Lignin / metabolism* Mucuna / chemistry Peroxidase / drug effects, metabolism Phenylalanine Ammonia-Lyase / drug effects, metabolism Plant Growth Regulators / pharmacology* Plant Roots / drug effects*, metabolism Soybeans / drug effects*, growth & development, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Levodopa; 0/Plant Growth Regulators; 9005-53-2/Lignin; EC 1.11.1.7/Peroxidase; EC 4.3.1.24/Phenylalanine Ammonia-Lyase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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