不同浓度苯丙氨酸对生菜叶酸含量和生长的影响The effect of different phenylalanine concentrations on the folic acid content and growth in lettuce
赵敏竹,曹亚茹,曲明山,张亚琦,王惠玉,郝敬虹,韩莹琰,刘超杰
摘要(Abstract)：
【目的】提升生菜叶片的营养品质。【方法】采用水培方式，将营养液中苯丙氨酸浓度分别设为0 mM(CK)、0.5 mM、1.0 mM、1.5 mM和2.0 mM,测量生菜生长指标、叶酸含量、叶绿素和光合参数。【结果】苯丙氨酸对生菜各指标的影响呈现显著浓度效应，1.5 mM处理下生菜叶片叶酸含量达峰值，较对照提升36.29%,且与其他处理差异显著；叶酸积累量在1.0 mM处理时最高，比1.5 mM处理的量略低。1.0 mM处理对叶长、叶宽及地上部鲜重的促进效果最优；0.5 mM处理的总叶绿素含量和净光合速率达到最大值，对气孔导度和细胞间隙CO_2浓度的抑制作用最为明显。【结论】外施苯丙氨酸的最佳浓度为1.5 mM,能显著提高生菜叶酸含量，并保障植株正常生长。
关键词(KeyWords)： 叶酸含量;生菜;苯丙氨酸;叶绿素;光合参数
基金项目(Foundation): 北京乡村振兴农业科技项目(NY2502050125)
作者(Author): 赵敏竹,曹亚茹,曲明山,张亚琦,王惠玉,郝敬虹,韩莹琰,刘超杰
DOI: 10.13473/j.cnki.issn.1002-3186.2026.0303
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