九州南部におけるダイズの晩播が子実中のイソフラボン含有量に及ぼす影響

Akagi, Isao; Nishihara, Motoki; Ueda, S.; Yokoyama, Akitoshi; Saeki, Yuichi

doi:10.1626/jcs.78.250

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…The impact of seeding date on the concentration of other soybean health-beneficial compounds has previously been reported. The response observed herein for soyasaponin B is similar to that reported for α-tocopherol but opposite to that of isoflavones. ,,, The response of soybean secondary metabolites to seeding date has often been associated with the impact of resulting temperatures at specific growth stages. , For example, earlier seeding dates (i.e., in May) compared to later dates (i.e., in June) are usually associated with higher air temperature during seed development. Higher air temperature during seed development has been demonstrated to increase α-tocopherol concentration but also decrease isoflavone concentration. , It is possible that the observed response of soyasaponin B to seeding date is mediated by a similar response to air temperature during specific growth stages, but this remains to be verified.…”

Section: Resultssupporting

confidence: 71%

“…The response observed herein for soyasaponin B is similar to that reported for α-tocopherol but opposite to that of isoflavones. 15,27,35,36 The response of soybean secondary metabolites to seeding date has often been associated with the impact of resulting temperatures at specific growth stages. 30,37 For example, earlier seeding dates (i.e., in May) compared to later dates (i.e., in June) are usually associated with higher air temperature during seed development.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Crop Management, Genotypes, and Environmental Factors Affect Soyasaponin B Concentration in Soybean

Séguin

Chennupati

Tremblay

et al. 2014

J. Agric. Food Chem.

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Soybean [Glycine max (L.) Merr.] seeds contain soyasaponin B, which has putative health benefits. Studies were conducted in multiple environments in Quebec, Canada to determine the effects of genotypes, environments, and seeding dates on soyasaponin B concentration in mature seeds. A growth chamber study was also conducted to determine the impact of high air temperature imposed at specific growth development stages on soyasaponin B in soybeans. Concentrations of individual and total soyasaponin B were determined using high-performance liquid chromatography. Genotype and environment main effects were the main determinants of soyasaponin B concentration in soybean, genotype × environment interactions accounting for less than 5% of the variation for all soyasaponin. Ranking of 20 early maturing soybean genotypes was thus relatively consistent across four environments, total concentration varying between 2.31 and 6.59 μmol g(-1). Seeding date consistently impacted soyasaponin B concentrations, early seeding date resulting in the highest concentrations. There was an 11% difference in total soyasaponin B concentration of soybeans seeded in mid-May compared to that in late-June. The response to high air temperature was complex and cultivar specific. High temperature stress restricted to the seed filling stages increased total soyasaponin B concentration in one cultivar by 28% when compared to that in control nonstressed plants; however, in another cultivar high temperature applied during all growth stages reduced total concentration by 27%. Results from the present study thus demonstrate that environmental factors and crop management both impact soyasaponin B concentration in soybeans.

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Section: Resultssupporting

confidence: 71%

Section: ■ Results and Discussionmentioning

confidence: 99%

Crop Management, Genotypes, and Environmental Factors Affect Soyasaponin B Concentration in Soybean

Séguin

Chennupati

Tremblay

et al. 2014

J. Agric. Food Chem.

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“…Possible factors could include soil temperature, air temperature, and irradiance level and quality at specific crop developmental stages, factors that were all demonstrated to affect the concentration of other health-beneficial compounds in soybean . The seeding date was previously reported by several to affect soybean isoflavones; later seeding resulted in higher concentrations − . Such a response is attributable in part to the fact that late seeding resulted in the exposition of developing seeds to lower temperatures, which has been hypothesized to lead to increased isoflavone synthesis in seeds.…”

Section: Discussionmentioning

confidence: 93%

Soybean Tocopherol Concentrations Are Affected by Crop Management

Séguin

Tremblay

Pageau

et al. 2010

J. Agric. Food Chem.

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Soybeans are an important source of tocopherols, which have health-beneficial properties. Previous studies have demonstrated that environmental factors may affect soybean tocopherol concentrations; the impact of specific crop management strategies, however, remains poorly understood. Experiments were conducted for 2 years at three sites in Quebec to determine the impact on soybean tocopherol concentrations of seeding rate, row spacing, seeding date, cultivar, and P and K fertilization. Total and alpha-, gamma-, and delta-tocopherol concentrations were determined by high-performance liquid chromatography. Overall, alpha-tocopherol was the most responsive to the factors evaluated; the response of other tocopherols was often lower or inconsistent across environments. The seeding rate affected alpha-tocopherol concentrations in three out of five environments; seeding at a rate of 40 seeds m(-2) resulted in 4% higher concentrations than seeding at a higher rate. Wide row spacing (more than 36 cm) resulted in two out of five environments in 6% higher alpha-tocopherol concentrations as compared to narrower row spacing. The seeding date had a greater impact; mid- to late-May seeding across four environments resulted in 45% greater alpha-tocopherol concentrations than seeding at later dates. Phosphorus and K fertilization had a negligible impact on tocopherol concentrations. Across experiments, large differences were observed between environments; plants grown in northern environments consistently had lower concentrations of alpha- and gamma-tocopherols but higher concentrations of delta-tocopherol. Differences between cultivars were also consistent, ranging between 10 and 30%, depending on the tocopherol. Results demonstrate that soybean tocopherol concentrations are affected by crop management and thus suggest that specific recommended agronomic practices may need to be established for the production of soybeans for the functional food market.

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“…The inconsistent response to seeding date we observed for lutein differs from the response of other health‐beneficial compounds in soybean. For example, it has been shown that later seeding consistently results in higher isoflavone concentrations (Al‐Tawaha and Seguin, 2006; Akagi et al, 2009). On the other hand, earlier seeding resulted in higher α‐tocopherol than later planting dates (Seguin et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Soybean Lutein Concentration: Impact of Crop Management and Genotypes

et al. 2011

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Lutein is a carotenoid with health-beneficial properties found in soybean [Glycine max (L.) Merr.]. A study was conducted in multiple environments in Quebec, Canada, to determine the effects of crop management practices and genotypes on soybean lutein concentrations. Practices evaluated included seeding rate, row spacing, seeding date, and P and K fertilization; lutein variation and stability among 20 genotypes were also studied. Management practices affected soybean lutein concentration to different degrees. Seeding date had the greatest effect on lutein concentration of all factors evaluated, but response varied greatly between environments. Differences in lutein concentration between seeding date treatments averaged 41%. Seeding rate, row spacing, and P and K fertilization effects were minimal. Increasing the seeding rate from 40 to 60 seed m-^ resulted in a 6% increase in lutein concentration. Response to row spacing and P fertilization treatment was inconsistent and differences between treatments were never >8%. There was no response to K fertilization. Large differences were observed between the 20 genotypes evaluated, with lutein concentrations ranging between 4.1 and 10.9 |jg g-\ Despite the presence of significant environmental effects, genotypes with consistently high and stable lutein concentrations were identified. Selection and development of high-lutein cultivars should be possible; however, environmental factors and crop management practices should be considered in the use of soybean as a source of lutein.

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九州南部におけるダイズの晩播が子実中のイソフラボン含有量に及ぼす影響

Cited by 4 publications

References 9 publications

Crop Management, Genotypes, and Environmental Factors Affect Soyasaponin B Concentration in Soybean

Crop Management, Genotypes, and Environmental Factors Affect Soyasaponin B Concentration in Soybean

Soybean Tocopherol Concentrations Are Affected by Crop Management

Soybean Lutein Concentration: Impact of Crop Management and Genotypes

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