Abstract:

【Objective】 To study the effect of NaCl stress on Seed Germination of chime by analyzing and comparing the salt tolerance of Inner Mongolia chyme 186 and Xinjiang chyme MZ04.【Methods】 In this study, the materials were treated by seed germination test, and the germination potential, germination rate, radicle root length, radicle stem length, germination index and vigor index were calculated.In the process, there were significant differences in germination power, germination rate, germination index, vigor index, radicle and radicle length among the tested materials.【Results】 With the increase of NaCl concentration, each index decreased at 200 and 250 mmol / L.The germination rate, germination potential, germination index and vigor index of Xinjiang chyme MZ04 under mmol / L treatment were significantly higher than those of Inner Mongolia chyme 186 in mainland China, and the radicle and radicle length of Xinjiang chyme MZ04 under different concentrations of NaCl treatment were higher than those of Inner Mongolia chyme 186 in mainland China.Through statistical regression analysis, it was found that during the process of NaCl stress, the concentration of NaCl was negatively correlated, and the concentration of salt tolerance semi inhibition of Xinjiang chyme MZ04 was higher than that of Inner Mongolia chyme 186.The germination rate of Inner Mongolia chyme 186 and Xinjiang chyme MZ04 was 107.39 mmol / L, 4.18 mmol / L higher than that of Inner Mongolia chyme 186, the activity index was 45.81 mmol / L, 5.2 mmol / L higher than that of Inner Mongolia chyme 186.【Conclusion】 In the process of salt stress, the related indexes of germination are mainly determined by salt concentration and salt tolerance of varieties, and the salt tolerance of Xinjiang chyme MZ04 seed in germination period is higher than that of chyme 186.

Key words: NaCl stress; Panicum miliaceum L.; seed germination

摘要：

【目的】研究NaCl胁迫对糜子种子萌发的影响,分析比较内蒙古糜子186和新疆黄糜MZ04的耐盐性。【方法】于种子萌芽期处理参试材料,统计发芽势、发芽率、胚根长度、胚茎长度,计算发芽指数,活力指数。【结果】NaCl胁迫过程中,参试材料种子发芽势、发芽率、发芽指数、活力指数、胚根、胚茎长度差异显著,随着NaCl溶液浓度的增加,各个指标均降低,在200、250 mmol/L处理下MZ04的发芽率、发芽势、发芽指数、活力指数明显高于内蒙古糜子186;且在不同浓度NaCl处理下MZ04的胚根、胚茎长度均高于内蒙古糜子186;NaCl胁迫过程中,糜子种子萌发期各指标与NaCl浓度呈负相关,MZ04各个指标的耐盐半抑制浓度均高于内蒙古糜子186;MZ04的发芽率耐盐半抑制浓度为107.39 mmol/L,较内蒙古糜子186高出4.18 mmol/L,活力指数耐盐半抑制浓度为45.81 mmol/L,较内蒙古糜子186高出5.2 mmol/L。【结论】糜子在盐胁迫过程中,萌发相关指标主要是由盐浓度及品种的耐盐特性决定,新疆黄糜MZ04种子萌发期的耐盐性高于内蒙古糜子186。

关键词: NaCl胁迫, 糜子, 种子萌发