<正>对盐胁迫及盐胁迫下施硅肥的金丝小枣叶片中游离态（f）、高氯酸可溶性共价结合态（PSCC）和高氯酸不溶性共价结合态（PISCC）3种不同形态多胺（PAs）的含量变化进行了分析。结果表明：在盐分浓度C≤4.0g/kg范围内，金丝小枣叶片f-Put含量及f-PAs总量均显著下降，（Spd＋Spm）/Put的比值均显著上升；金丝小枣叶中PSCC-Put和总PSCC-PAs含量随着盐浓度的增加显著增加；PISCC-Put含量随着盐浓度的增加而显著增加，PISCC-Spd和PISCC-Spm含量则随着盐浓度的增加而减少。在同一土壤盐分水平下，硅处理可以显著增加盐胁迫下金丝小枣叶中多胺（f－Spm＋f－Spd）/f-Put比值及f-Put、f-Spd、PSCC-Put、PSCC-Spd和总PSCC-PAs的含量；施硅可以增加盐胁迫下金丝小枣叶中PISCC-Spd和PISCC-Spm的含量，抑制盐胁迫下PISCC-Put水平的升高，表明外源硅可以调节盐胁迫下金丝小枣体内不同种类和形态的多胺含量，从而缓解盐对金丝小枣的毒害作用。

The contents of flavonoids and lactones in ginkgo pollen over one-hundred-years-old male ginkgo trees from 15 different regions were analysized by HPLC. The results were as follows: the average content of total flavonoids of ginkgo pollen was 20.44mg/g. The component of lactones firstly detected from ginkgo pollen was ginkolide A, and its average content was 2.22mg/g. Correlation analyses showed that the contents of flavonoids and lactones from ginkgo pollen in different regions didn’t remarkably correlate with climatic and geographical factors. Chongqing-O1, Guangde-O1, Beijing-O1, Kangxian--O1, were pri2 marily selected for selecting superior-individual and establishing pollen-producing plantation of ginkgo.