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首页> 外文期刊>Genetics and Plant Physiology >LIPID ACCUMULATION IN DEVELOPING SOYBEAN: INFLUENCE OF SEED POSITION ON STEM AXIS
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LIPID ACCUMULATION IN DEVELOPING SOYBEAN: INFLUENCE OF SEED POSITION ON STEM AXIS

机译：发展大豆脂质积累：种子位置对茎轴的影响

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摘要

A proper understanding of various biochemical aspects of lipid metabolism during seed development is important as a guide for bringing changes in agricultural practices. Both oils and proteins are subjected to positional effect. This paper reports lipid accumulation in developing soybean seedlings as influenced by their position on the stem axis. The dry matter content of the seeds and pod walls increased 28 days after flowering (DAF) up to maturity at both basal and apical positions. Accumulation ofseed lipids was rapid from 42 to 56 DAF at the basal position and from 35 to 56 DAF at the apical position. Maximum incorporation of 1-~(14)C-acetate into lipids was observed at 42 DAF in seeds at both basal and apical positions. The content of starch,total soluble sugars and reducing sugars in seeds as well as pod wall was almost similar in both positions but on mg seed~(-1) basis, these parameters showed higher values at the apical position. Membrane lipids decreased with seed development and triglycerides showed an increasing trend from 28 to 63 DAF in the seeds at both positions. The 1-~(14)C-incorporation into polar lipids was maximum at 28 DAF which decreased with seed development at both nodal positions. The proportion of 18:2 was higher and 18:3 lower at apical as compared to basal position. The rate of oil filling was higher in basal nodes in comparison to the apical portion of the soybean plant with no appreciable difference in the membrane lipid composition. However, oil quality attributes changed with seed position on the stem axis.
机译：在种子发展过程中对脂质代谢的各种生化方面的正确理解是一种造成农业实践变化的指南。含两种油和蛋白质都会受到局部效应。本文报告了在茎轴上其位置的影响发展大豆幼苗的脂质积累。种子和荚壁的干物质含量在开花（DAF）后28天增加，在基础和顶端位置的成熟度。在基础位置的基础位置和35至56个DAF在顶端位置的累积脂质的积累从42-56个DAF迅速。在基础和顶端位置的种子中，在42个DAF中观察到1-〜（14）乙酸盐的最大掺入脂质。在种子中的淀粉，总可溶性糖和还原糖以及荚壁的含量在两个位置几乎相似，但在Mg Seed〜（-1）的基础上，这些参数在顶端位置显示出更高的值。膜脂质随种子发育而降低，甘油三酯在两个位置的种子中显示出28至63个DAF的趋势。 1-〜（14）C-掺入极性脂质的28 DAF最大值，随着淋巴结位置的种子发育而降低。与基础位置相比，18：2的比例较高，18：3下降。与大豆植物的顶端部分相比，基础节点的油填充速率较高，膜脂质组合物没有明显差异。但是，油质属性随阀杆轴上的种子位置而变化。

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