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首页> 美国卫生研究院文献>Plants >Effects of pH and Mineral Nutrition on Growth and Physiological Responses of Trembling Aspen (Populus tremuloides) Jack Pine (Pinus banksiana) and White Spruce (Picea glauca) Seedlings in Sand Culture
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Effects of pH and Mineral Nutrition on Growth and Physiological Responses of Trembling Aspen (Populus tremuloides) Jack Pine (Pinus banksiana) and White Spruce (Picea glauca) Seedlings in Sand Culture

机译：pH与矿物营养对浅亚斯本（Populus Tremuloides）杰克松（Pinus Banksiana）和白色云杉（Picea Glauca）幼苗在砂培中的生长和生理反应的影响

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摘要

Responses of trembling aspen (Populus tremuloides), jack pine (Pinus banksiana), and white spruce (Picea glauca) seedlings to root zone pH ranging from 5 to 9 were studied in sand culture in the presence of two mineral nutrition levels. After eight weeks of treatments, effects of pH on plant dry weights varied between the plant species and were relatively minor in white spruce. Higher nutrient supply significantly increased dry weights only in trembling aspen subjected to pH 5 treatment. There was little effect of pH and nutrition level on net photosynthesis and transpiration rates in white spruce and jack pine, but net photosynthesis markedly declined in aspen at high pH. Chlorophyll concentrations in young foliage decreased the most in trembling aspen and jack pine. The effects of high pH treatments on the concentrations of Mg, P, Ca, Mn, Zn, and Fe in young foliage varied between the plant species with no significant decreases of Fe and Zn recorded in trembling aspen and white spruce, respectively. This was in contrast to earlier reports from the studies carried out in hydroponic culture. The sand culture system that we developed could be a more suitable alternative to hydroponics to study plant responses to pH in the root zone. Plant responses to high pH appear to involve complex events with a likely contribution of nutritional effects and altered water transport processes.
机译：在两种矿物营养水平存在下，研究了在砂培养水平存在下，在砂培养中研究了颤抖的Aspen（Populus Tremuloides），杰克松（Pinus anculsiana）和白色云杉（Picea glauca）和白色云杉（Picea glauca）幼苗在砂培养。经过八周的治疗后，pH对植物干重的影响在植物物种之间变化，白色云杉中相对较小。只有在对pH5处理的颤抖的Aspen中，较高的营养供应显着增加了干重。 PH和营养水平对白云氏植物和千斤顶松的净光合作用和蒸腾速率几乎没有影响，但在高pH下净光合作用明显下降。年轻叶子中的叶绿素浓度下降最多在颤抖的阿斯彭和杰克松树中。高pH处理对植物物种之间的镁，P，Ca，Mn，Zn和Fe的浓度的影响，分别在促成颤抖的白杨和白色云杉中没有显着降低的植物物种之间变化。与水培培养中的研究中的早期报告相反。我们开发的砂培养系统可能是一种更合适的替代水培，研究植物对根区pH的pH值。植物对高pH的反应似乎涉及复杂的事件，具有营养效应和水运输过程改变的可能贡献。

著录项

  • 期刊名称 Plants
  • 作者

    Feng Xu; Maryamsadat Vaziriyeganeh; Janusz J. Zwiazek;

  • 作者单位
  • 年(卷),期 2020(9),6
  • 年度 2020
  • 页码 682
  • 总页数 12
  • 原文格式 PDF
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  • 关键词

    机译：pH耐受性;矿物营养;沙文化;树幼苗;煤气交换;生长;油砂再灌注;

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