Differential response to sulfur nutrition of two common bean genotypes differing in storage protein composition

Frontiers in Plant Science
Sudhakar PanduranganFrédéric Marsolais

Abstract

It has been hypothesized that the relatively low concentration of sulfur amino acids in legume seeds might be an ecological adaptation to nutrient poor, marginal soils. SARC1 and SMARC1N-PN1 are genetically related lines of common bean (dry bean, Phaseolus vulgaris) differing in seed storage protein composition. In SMARC1N-PN1, the lack of phaseolin and major lectins is compensated by increased levels of sulfur-rich proteins, resulting in an enhanced concentration of cysteine and methionine, mostly at the expense of the abundant non-protein amino acid, S-methylcysteine. To identify potential effects associated with an increased concentration of sulfur amino acids in the protein pool, the response of the two genotypes to low and high sulfur nutrition was evaluated under controlled conditions. Seed yield was increased by the high sulfate treatment in SMARC1N-PN1. The seed concentrations of sulfur, sulfate, and S-methylcysteine were altered by the sulfur treatment in both genotypes. The concentration of total cysteine and extractible globulins was increased specifically in SMARC1N-PN1. Proteomic analysis identified arcelin-like protein 4, lipoxygenase-3, albumin-2, and alpha amylase inhibitor beta chain as having increased levels ...Continue Reading

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Citations

Mar 27, 2019·Journal of Experimental Botany·Rachel AmirYael Hacham
Jun 25, 2019·Journal of Experimental Botany·Jaya JoshiFrédéric Marsolais

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Methods Mentioned

BETA
transgenic
Protein Assay
electrophoresis
size exclusion chromatography

Software Mentioned

MASCOT
Data Explorer
Quantity One
Dionex Peaknet
4000 Series Explorer
SAS

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