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有读书笔记Seed phosphorus (P) content affects growth, and P uptake of wheat plants and their association with arbuscular mycorrhizal (AM) fungi

1 saturn_sun 添加于 2010-4-26 10:03 | 2290 次阅读 | 0 个评论
  •  作 者

    Zhu, Y-G., Smith, S E
  •  摘 要

    Abstract: Two experiments were carried out in a growth chamber and a naturally lit glasshouse to investigate the influence of seed phosphorus (P) reserves on growth and P uptake by wheat plants (Triticum aestivum cv Krichauff), and their association with arbuscular mycorrhizal (AM) fungi. Increased seed P reserves improved plant growth at a range of P supply up to over 100 mg P kg-1 soil. Plants grown from seeds with high P reserves tended to accumulate more P from soil, which was mainly attributed to better root system development. Mycorrhizal colonisation did not significantly affect P uptake of plants grown with low irradiance (in growth chamber). However, in the naturally lit glasshouse, mycorrhizal plants had significantly higher P concentrations than non-mycorrhizal plants. Furthermore, mycorrhizal plants grown from seeds low in P accumulated similar amounts of P compared with those grown from seeds with high P, indicating that mycorrhizal colonisation may overcome the disadvantage of having low seed P reserves in the field.
  •  详细资料

    • 文献种类:期刊
    • 期刊名称: Plant and Soil
    • 期刊缩写: Plant Soil
    • 期卷页: 2001  231 1 105-112
    • 日期: 2001-4-1
  •  标 签

  •  saturn_sun 的文献笔记  订阅

    种子磷含量影响小麦植物的生长和磷吸收以及它们与灌木菌根真菌的结合

     

    关键词:生长反应、菌根、磷吸收、种子磷储量、Triticum aestivum

     

    摘要:在生长箱和天然光照温室内进行两个试验来调查种子P储量对于小麦植物(Triticum aestivum)的生长和P吸收的影响以及它们与灌木菌根真菌之间的联系。在P的一系列超过100mg P/kg土壤的供应下,种子P储量的增加改善了植物生长。从高P储量的种子生长出来的植物趋向于从土壤中积累更多的P,这主要归功于更好的根系发展。菌根寄生没有显著地影响低辐照度生长植物P的吸收。此外,从低P含量种子生长出来的菌根植物与那些从高P含量种子生长出来的菌根植物相比,积累了相似量的P,这表明菌根寄生可能克服在野外含有低种子P储量的缺点。

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