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为了解有机胺（苯基三甲基溴化铵，PTMAC）对小麦生长的调控效应，以济麦22为材料，采用浸种和叶面喷施相结合的处理方式，设置0、10、20、50和100 mg·L^-1五种浓度，研究了PTMAC对小麦幼苗生长、叶片叶绿素和可溶性蛋白含量及内源激素的影响。结果表明，与对照（0 mg·L^-1）相比，PTMAC处理浓度为10～50 mg·L^-1时，小麦幼苗的干重、分蘖数、叶片叶绿素含量、可溶性蛋白含量、IAA含量、ZR含量、GAs含量、IAA/ABA、GAs/ABA、ZR/ABA值均增加，而ABA含量、IAA/ZR值均降低。但当PTMAC处理浓度增加到100 mg·L^-1时，上述指标开始呈现相反的变化趋势。因此，低浓度的PTMAC可以促进小麦幼苗的生长，高浓度PTMAC对小麦幼苗的生长不利，适宜的PTMAC处理浓度为20～50 mg·L^-1。

英文摘要:

Using Jimai 22 as material, effects of different concentrations of organic amine Phenyltrimethylammonium bromide(PTMAC) on growth of wheat seedlings, chlorophyll content, soluble protein content, and endogenous hormone contents of leaves were investigated by the treatments of soaking seeds and foliage spraying. Results showed that:when the concentration of PTMAC were 10~50 mg·L^-1, comparing with the contrast, the dry weight and tiller number of the seedlings, the contents of chlorophyll, soluble protein, IAA, ZR, and GAs, and the ratios of IAA/ABA, GAs/ABA, and ZR/ABA in wheat leaves were all increased, while ABA content, and IAA/ZR ratio decreased. When the concentration of PTMAC was increased to 100 mg·L^-1, all the indexes mentioned above began to show the opposite trends. Therefore, low concentration of organic amine PTMAC could promote the growth of wheat seedlings, while high concentration of organic amine PTMAC was harmful to the growth of wheat seedlings. The suitable concentration of PTMAC was 20～50 mg·L^-1.

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