Oligosaccharide accumulation dynamics during the ripening of soybean seeds

Abstract

The relevant to study grain-type varieties to assess their potential for use as vegetable products.

The aim of the study is to examine the oligosaccharide (sucrose, raffinose, and stachyose) accumulation in soybean grains of soybean varieties of the All-Russian Scientific Research Institute of Soybean during ripening between reproductive stages R6–R7. Increase in sucrose, raffinose and stachyose content during seed filling was found for all varieties. Grain-type varieties Dauriya and Evgeniya demonstrated more intensive sucrose accumulation compared to Mikawashima. The preferred harvesting period for green beans can be considered from the 1st to the 14th day of the R6 phase, during which green soybean seeds exhibited an optimal balance between sucrose content and antinutritional oligosaccharides. During this period, the sucrose content in grains of Dauria and Eugenia varieties was 2.74–3.65 g / 100 g and 2.59–4.44 g / 100 g, respectively, the total content of raffinose and stachyose (Σ OCP) was 0.78–1.0 g /100 g (Dauria) and 0.42–2.32 g / 100 g (Eugenia), providing a sucrose — ΣR ratio in the ranges of 3.51–3.65 (Dauria) and 6.17–1.91 (Eugenia). The Evgeniya variety, selected from the 1st to the 7th day after the R6 stage, exhibits the most favorable “sucrose— Σ ORS” balance (6.17–3.48) and appears promising for further research to assess its suitability for use as a vegetable product.