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- Title
不同粒重大豆籽粒蛋白质、脂肪及可溶性糖积累动态.
- Authors
王春雨; 李彦生; 刘长锴; 张秋英; 金剑; 刘居东; 刘晓冰
- Abstract
【Objective】 This study aimed to (1) examine the differences in the accumulation of protein, oil and free soluble sugar in different seed size soybean cultivars during seed filling stage and (2) evaluate relevant physiological mechanism. The outcomes of this study will provide a scientific basis for better cultivation and cultivar breeding for soybean withdifferent commercial purposes.【Methods】 Three soybean cultivars, small-seedsoybean (7.13 g/100-seed), normal-seed soybean (20.21 g/100-seed) and big-seed soybean (30.54 g/100-seed), were planted in field condition. We examined leaf photosynthetic ratesduring thekey growth stage, quantified seed protein, oil, free soluble sugar concentration and dry matter weight during seed filling and evaluated their relationships.【Results】 Relatively shorter peak period of photosynthetic rate was found in small-seed soybean and its maximum photosynthetic rate was 10 d earlier than that of normal-seed and big-seed soybean. The accumulated ratio of dry matterwas significantly different among soybean cultivars during the initial 0-20 d seed filling period. The accumulated dry matterin this stage accounted for 82% of final seed weight in small-seed soybean, whereas it was 49% and 66%, respectively, in normal-seed soybean and big-seed soybean. The seed free soluble sugar concentration in big-seed soybean was significantly higher than that of small-seed soybean and normal-seed soybean, whereas the seed protein concentration in normal-seed soybean was significantly higher than that of small-seed soybean and big-seed soybean during the whole seed filling stage. The accumulation ratios of oil in small-seed and big-seed soybean were higher than that of normal seed soybean in the early seed filling stage (0-20 d). The correlation between seed dry matter and seed free soluble sugar concentration was significantly positive during the early seed filling stage, but significantly negative during the late seed filling stage in soybeans. The seed oil concentration was positively correlated with seed dry matter mass in normal-seed and big-seed soybean, but negatively correlated with seed protein concentration and free soluble sugar concentration in big-seed soybean during the late seed filling stage. No significant relationships were found among seed protein, oil and free soluble sugar concentration in small-seed soybean at the same stage.【Conclusion】 Significant differences existed for seed protein, oil and free soluble sugar concentrations in soybeans with different seed size. The early seed filling stage (0-20 d) is the key and fast period for dry matter accumulation, which is more critical for the total matter accumulation in small-seed soybean. Whereas the late seed filling stage (30-50 d) is as important as early-seed filling stage in normal-seed and big-seed soybean for total matter accumulation.
- Publication
Xinjiang Agricultural Sciences, 2021, Vol 58, Issue 1, p56
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2021.01.007