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首页> 美国卫生研究院文献>Scientific Reports >Effect of seed position and soil nutrients on seed mass germination and seedling growth in Peucedanum oreoselinum (Apiaceae)
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Effect of seed position and soil nutrients on seed mass germination and seedling growth in Peucedanum oreoselinum (Apiaceae)

机译：种子位置和土壤养分对红皮前胡种子质量萌发和幼苗生长的影响

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摘要

There is large variation in seed mass within P. oreoselinum (L.) Moench selected for the present study from two contrasting habitats: roadside and oak forest. Effect of seed position within a plant and of soil nutrients on seed mass, germination and seedlings growth were studied. Within an individual plant, seed mass decreased with umbel order and seeds from the central umbellet of the umbel were lighter than those from the outer edge, suggesting that variation in seed mass within an individual plant was due to the position effect. There was a significant relationship between seed mass and total germination. Covariate analysis showed the differences between sites in seed macronutrient contents were caused by respective differences in seed mass and soil macronutrients. This indicates substantial variation in the amount of reserves initially available for seedling growth. In conclusion, phenotypically-based variation in seed mass may arise from soil conditions, maternal traits or combination of the two. High variability in seed mass of P. oreoselinum favours its widespread geographic distribution. These results suggest that with respect to germination characteristics large seeds from primary order have a competitive advantage over small seeds produced on secondary umbels because they have higher overall germination.
机译：在本研究中，从两个相反的生境：路旁和橡树林中选择的原产赤藓（P. oroseoselinum（L.）Moench）的种子质量差异很大。研究了植物中种子位置和土壤养分对种子质量，发芽和幼苗生长的影响。在单株植物中，种子质量按伞形序降低，而伞形伞中部伞形种子的种子轻于外缘，这表明单个植物中种子质量的变化归因于位置效应。种子质量与总发芽之间存在显着关系。协变量分析显示，种子中大量营养素含量的位点之间的差异是由种子质量和土壤中大量营养素的各自差异引起的。这表明最初可用于幼苗生长的储备量有很大变化。总之，基于表型的种子质量变化可能是由于土壤条件，母性或两者的结合所致。棉假单胞菌种子质量的高度变异性有利于其广泛的地理分布。这些结果表明，就发芽特性而言，初级种子较大的种子比次级伞形种子产生的小种子具有竞争优势，因为它们具有较高的总体发芽率。

著录项

  • 期刊名称 Scientific Reports
  • 作者

    Jeremi Kołodziejek;

  • 作者单位
  • 年(卷),期 -1(7),-1
  • 年度 -1
  • 页码 1959
  • 总页数 11
  • 原文格式 PDF
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