2018
DOI: 10.1080/15592324.2018.1451705
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Comparative effects of L-DOPA and velvet bean seed extract on soybean lignification

Abstract: Velvet bean (Mucuna pruriens) is an efficient cover forage that controls weeds, pathogens and nematodes, and the non-protein amino acid L-3,4-dihydroxyphenylalanine (L-DOPA) is its main allelochemical. The effects of 3 g L of an aqueous extract of velvet bean seeds, along with 0.5 mM L-DOPA for comparison, were evaluated in roots, stems and leaves of soybean (Glycine max). The activities of phenylalanine ammonia lyase (PAL) and cinnamyl alcohol dehydrogenase (CAD) were determined, along with the lignin content… Show more

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Cited by 7 publications
(3 citation statements)
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“…L-DOPA is toxic to parasitic insects [6] such as nematodes, some of which infect plant roots. L-DOPA also inhibits the growth of neighboring plants—at a strength 100-fold higher than glyphosate [7]—likely interfering with amino acid synthesis and cell wall lignification [8]. L-DOPA is also toxic to herbivore insects; focal damage to Mucuna leaves, which already contain 1% L-DOPA, leads to local upregulation of L-DOPA [9].…”
Section: Methodsmentioning
confidence: 99%
“…L-DOPA is toxic to parasitic insects [6] such as nematodes, some of which infect plant roots. L-DOPA also inhibits the growth of neighboring plants—at a strength 100-fold higher than glyphosate [7]—likely interfering with amino acid synthesis and cell wall lignification [8]. L-DOPA is also toxic to herbivore insects; focal damage to Mucuna leaves, which already contain 1% L-DOPA, leads to local upregulation of L-DOPA [9].…”
Section: Methodsmentioning
confidence: 99%
“…Allelochemicals can cause changes in the plant growth and development such as cellular alterations, changes in the enzymatic activities of the phenylpropanoid pathway, reduction of leaf expansion and root elongation, reduction of the photosynthetic rate, disintegration of the cap, increase in the diameter of the vascular cylinder, and premature lignification of the metaxylem and cell wall. This may impair the nutrient absorption ability, the expansion of cells, and the ability to sustain plant growth (Soltys et al, 2011;Granã et al, 2013;Ferro et al, 2015;Bido et al, 2018).…”
Section: Concentrationmentioning
confidence: 99%
“…M a n u s c r i t o a c e p t a d o M. pruriens como controladora de nemátodos, arvenses y muchas enfermedades edáficas (Bunch, 2012;de Souza Bido et al, 2018).…”
Section: Introductionunclassified