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首页> 外文期刊>Science China Life Sciences >Protein differential expression in the elongating cotton (Gossypium hirsutum L.) fiber under nitrogen stress
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Protein differential expression in the elongating cotton (Gossypium hirsutum L.) fiber under nitrogen stress

机译：氮胁迫下伸长棉纤维的蛋白质差异表达

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摘要

Nitrogen (N) is an essential macronutrient and an important factor limiting agricultural productivity. N deficient or excess conditions often occur during the cotton growth season and incorrect N application may affect cotton fiber yield and quality. Here, the influence of N stress on the cotton fiber proteome was investigated by two-dimensional gel electrophoresis and mass spectrometry. The results indicated that N application rate affects nitrogen accumulation in fiber cells and fiber length. The proteins differentially expressed during N stress were mainly related to plant carbohydrate metabolism, cell wall component synthesis and transportation, protein/amino acid metabolism, antioxidation and hormone metabolism. The most abundant proteins were C metabolism-related. Ten days post anthesis is a critical time for fiber cells to perceive environmental stress and most proteins were suppressed in both N deficient and N excess conditions at this sampling stage. However, several N metabolism proteins were increased to enhance N stress tolerance. Excess N may suppress carbohydrate/energy metabolism in early fiber development much like N deficiency. These results have identified some interesting proteins that can be further analyzed to elucidate the molecular mechanisms of N tolerance.
机译：氮是必需的大量营养素，也是限制农业生产力的重要因素。棉花生长季节经常会出现氮素不足或过量的情况，氮素施用不当会影响棉花纤维的产量和质量。在此，通过二维凝胶电泳和质谱法研究了氮胁迫对棉纤维蛋白质组的影响。结果表明，氮的施用量会影响纤维细胞中氮的积累和纤维长度。在氮胁迫下差异表达的蛋白质主要与植物碳水化合物的代谢，细胞壁成分的合成和运输，蛋白质/氨基酸代谢，抗氧化和激素代谢有关。最丰富的蛋白质与C代谢有关。花后十天是纤维细胞感知环境压力的关键时间，在此采样阶段，大多数蛋白质在氮缺乏和氮过量的条件下均被抑制。但是，增加了一些N代谢蛋白以增强N胁迫耐受性。氮过多可能会在纤维早期发育中抑制碳水化合物/能量代谢。这些结果确定了一些有趣的蛋白质，可以对其进行进一步分析以阐明N耐受性的分子机制。

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