Abstract
Abstract Decreasing the lipoxygenase content of soybean ( Glycine max (L.) Merr.) seed is a prerequisite for its increased use in human foods. These investigations aim to analyse the variation of lipoxygenase contents in relation to the genotype or the nitrogen nutrition of the plant. Four genotypes from a divergent selection for N 2 fixation and the recurrent parent, Weber, were grown in pots, and two Bradyrhizobium japonicum strains (G.49 and SMGS1) were used. Dinitrogen fixation was estimated in situ using the acetylene–reduction assay. The lipoxygenase activity was determined polarographically on seeds taken from plants grown under controlled conditions in the presence or absence of symbiotic N 2 fixation. The large genotypic variation observed for the lipoxygenase contents was enhanced by high N 2 fixation. The variation range of lipoxygenase contents, which was obtained through the combination of the genotypic variation and the N 2 fixation activity, was relatively large with a ratio of 2 on a seed dry–weight basis and a ratio of 2.6 when the total proteins were considered. Decreased lipoxygenase content and increased total protein content can thus be considered in parallel in a genetic context, together with more efficient N 2 fixation.
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Claims 4
Claim · model-written summary
Genotypic variation in seed lipoxygenase content was enhanced by high N2 fixation.
- Taxon
- soybean
Glycine maxt0 - Treatment
- high N 2 fixatione1
- Outcome
- lipoxygenase contentse1
- Direction
- enhancede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genotypic lipoxygenase variation in soybean seeds”
e1“The large genotypic variation observed for the lipoxygenase contents was enhanced by high N 2 fixation”
Claim · model-written summary
The variation range of seed lipoxygenase contents was about a ratio of 2 on a seed dry-weight basis.
- Taxon
- soybeanGlycine maxt0
- Outcome
- variation range of lipoxygenase contentse2
- Value
- ratio of 2e2
- Qualifier
- on a seed dry–weight basise2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genotypic lipoxygenase variation in soybean seeds”
e2“The variation range of lipoxygenase contents, which was obtained through the combination of the genotypic variation and the N 2 fixation activity, was relatively large with a ratio of 2 on a seed dry–weight basis”
Claim · model-written summary
The variation range of seed lipoxygenase contents was a ratio of 2.6 when total protein was considered.
- Taxon
- soybeanGlycine maxt0
- Outcome
- variation range of lipoxygenase contentse4
- Value
- ratio of 2.6e3
- Qualifier
- when the total proteins were considerede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genotypic lipoxygenase variation in soybean seeds”
e3“a ratio of 2.6 when the total proteins were considered”
e4“The variation range of lipoxygenase contents”
Claim · model-written summary
Decreased lipoxygenase content and increased total protein content can be considered in parallel in a genetic context, together with more efficient N2 fixation.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Decreased lipoxygenase content and increased total protein contente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genotypic lipoxygenase variation in soybean seeds”
e5“Decreased lipoxygenase content and increased total protein content can thus be considered in parallel in a genetic context, together with more efficient N 2 fixation”