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首页> 美国卫生研究院文献>Frontiers in Plant Science >Effects of foliar boron application on seed composition cell wall boron and seed δ15N and δ13C isotopes in water-stressed soybean plants
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Effects of foliar boron application on seed composition cell wall boron and seed δ15N and δ13C isotopes in water-stressed soybean plants

机译：叶面施用硼对水分胁迫大豆植株种子组成细胞壁硼以及种子δ15N和δ13C同位素的影响

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Limited information is available on the effects of foliar boron (B) application on soybean seed composition. The objective of this research was to investigate the effects of foliar B on seed composition (protein, oil, fatty acids, and sugars). Our hypothesis was that since B is involved in nitrogen and carbon metabolism, it may impact seed composition. A repeated greenhouse experiment was conducted where half of the soybean plants was exposed to water stress (WS) and the other half was well-watered. Foliar boron (FB) in the form of boric acid was applied twice at a rate of 1.1 kg ha−1. The first application was during flowering stage, and the second application was during seed-fill stage. Treatments were water stressed plants with no FB (WS–B); water stressed plants with FB (WS+B); watered plants without FB (W–B), and watered plants with FB (W+B). The treatment W–B was used as a control. Comparing with WS–B plants, B concentration was the highest in leaves and seed of W+B plants (84% increase in leaves and 73% in seed). Seeds of W+B plants had higher protein (11% increase), oleic acid (27% increase), sucrose (up to 40% increase), glucose, and fructose comparing with W–B. However, seed stachyose concentrations increased by 43% in WS–B plants seed compared with W–B plants. Cell wall (structural) B concentration in leaves was higher in all plants under water stress, especially in WS–B plants where the percentage of cell wall B reached up to 90%. Water stress changed seed δ15N and δ13C values in both B applied and non-B applied plants, indicating possible effects on nitrogen and carbon metabolism. This research demonstrated that FB increased B accumulation in leaves and seed, and altered seed composition of well-watered and water stressed plants, indicating a possible involvement of B in seed protein, and oleic and linolenic fatty acids. Further research is needed to explain mechanisms of B involvement in seed protein and fatty acids.
机译：关于叶面硼（B）施用对大豆种子成分的影响的信息有限。这项研究的目的是研究叶面B对种子成分（蛋白质，油，脂肪酸和糖）的影响。我们的假设是，由于B参与氮和碳代谢，因此可能影响种子组成。进行了重复的温室实验，其中一半的大豆植株受到水分胁迫（WS），另一半水分充足。硼酸形式的叶面硼（FB）以1.1 kg ha -1 的量施用两次。第一次施用是在开花阶段，第二次施用是在种子填充阶段。处理方法是没有FB（WS-B）的水分胁迫植物； FB（WS + B）的水分胁迫植物；不带FB（W-B）的浇水植物和带FB（W + B）的浇水植物。处理WB被用作对照。与WS–B植物相比，W + B植物的叶片和种子中B的含量最高（叶片增加84％，种子增加73％）。与W–B相比，W + B植物的种子具有更高的蛋白质（增加11％），油酸（增加27％），蔗糖（最多增加40％），葡萄糖和果糖。但是，与W–B植物相比，WS–B植物种子的水苏糖浓度增加了43％。在水分胁迫下的所有植物中，叶片中细胞壁B的浓度都较高，尤其是在WS-B植物中，细胞壁B的比例高达90％。水分胁迫改变了施用B和不施用B的植物中种子的δ 15 N和δ 13 C值，表明其可能对氮和碳代谢产生影响。这项研究表明，FB增加了叶片和种子中B的积累，并改变了水分充足和水分胁迫的植物的种子组成，这表明B可能参与了种子蛋白，油酸和亚麻酸的脂肪酸。需要进一步的研究来解释B参与种子蛋白和脂肪酸的机制。

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