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  • CN 11-3996/S
杨丽琴, 封克, 夏小燕, 司江英. 不同pH和不同氮素形态对小麦根中钙分布的影响[J]. 植物营养与肥料学报, 2007, 13(1): 77-80. DOI: 10.11674/zwyf.2007.0113
引用本文: 杨丽琴, 封克, 夏小燕, 司江英. 不同pH和不同氮素形态对小麦根中钙分布的影响[J]. 植物营养与肥料学报, 2007, 13(1): 77-80. DOI: 10.11674/zwyf.2007.0113
YANG Li-qin, FENG Ke, XIA Xiao-yan, SI Jiang-ying. Effects of pH and N forms on the distribution of Ca2+ in wheat root[J]. Journal of Plant Nutrition and Fertilizers, 2007, 13(1): 77-80. DOI: 10.11674/zwyf.2007.0113
Citation: YANG Li-qin, FENG Ke, XIA Xiao-yan, SI Jiang-ying. Effects of pH and N forms on the distribution of Ca2+ in wheat root[J]. Journal of Plant Nutrition and Fertilizers, 2007, 13(1): 77-80. DOI: 10.11674/zwyf.2007.0113

不同pH和不同氮素形态对小麦根中钙分布的影响

Effects of pH and N forms on the distribution of Ca2+ in wheat root

  • 摘要: 利用电镜技术研究了不同pH(4.0和6.0)和氮形态(NH4+-N和NO3---N)对小麦根系超微结构及根中Ca2+分布的影响。结果表明,1)pH.4.0处理下细胞结构中Ca2+明显少于pH.6.0处理;2)低pH造成质壁分离;3)铵态氮源处理下细胞结构中Ca2+明显少于硝态氮源处理,尤其体现在细胞间质、细胞壁、细胞膜上;4)铵态氮源处理也会导致细胞出现质壁分离,细胞结构松散,胞质外流;低pH加重这些现象。

     

    Abstract: Transmission electron microscopy was used to observe effects of two pH levels(4.0 and 6.0)and nitrogen forms(NH4+-N,NO3--N) on the root ultrastructure and Ca2+ distribution in wheat root.Results obtained were the following: 1) Ca2+ content in wheat root cells at the pH 4.0 was lower than that at pH 6.0;2) Low pH could induce plasmolysis of wheat root cells;3) Ca2+ in wheat root cells,especially in intercellular substances,cell wall and cell membrane,with NH4+-N as nitrogen source was significant lower than NO3--N;and 4)Ammonium nitrogen was also able to induce plasmolysis,structure loss and cytoplasm outflow of wheat root cells.Low pH could exacerbate these symptoms.

     

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