赤霉素对盐胁迫下甘蓝种子萌发及幼苗生长的影响

[目的]研究赤霉素对盐胁迫下甘蓝种子萌发及幼苗生长的影响。[方法]以‘中甘11号’为试材,研究了盐胁迫下不同浓度赤霉素溶液对甘蓝种子萌发、幼苗生长、叶片POD和SOD活性、MDA含量的影响。[结果]100 mg/L赤霉素处理甘蓝种子的发芽势、发芽率、发芽指数最高,株高、最大根长和根冠比等形态指标数值最大,分别为79%、96%、76.555、16.900 cm、13.788 cm、0.268;同时幼苗叶片中POD活性和SOD活性最高,分别为122.5 U/(g·min)和269.446 U/g,MDA含量最低,为0.289μmol/g。[结论]100 mg/L赤霉素处理可有效缓解盐胁迫,利于甘蓝种子萌发及幼苗生长。

Effects of Gibberellins on Seed Germination and Seedling Growth of Brassica oleracea L.under Salt Stress

[Objective ] To research the effects of gibberellins on seed germination and seedling growth of Brassica oleracea L.under salt stress.[ Method] With Zhonggan 11 as the test material, we researched the effects of different concentrations of gibberellins on seed germina-tion, seedling growth, leaf POD and SOD activities and MDA content of B.oleracea under salt stress were studied.[ Result] Morphological in-dexes such as germination rate, germination rate, germination index, plant height, and maximum root length and root-shoot ratio were the highest at 100 mg/L gibberellins treatment, which were 79%, 96%, 76.555, 16.900 cm, 13.788 cm and 0.268 respectively.The activities of POD and SOD were the highest in the leaves of the seedlings, which were 122.5 U/g· min and 269.446 U/g.And malondialdehyde con-tent was the lowest, which was 0.289 μmol/g .[Conclusion] 100 mg/L gibberellins treatment could alleviate salt stress effectively and pro-mote seed germination and seedling growth of B.oleracea.