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混合盐碱胁迫对灰绿藜(Chenopodium glaucum L.)种子萌发的影响

古丽内尔·亚森,杨瑞瑞,曾幼玲**   

  1. (新疆大学生命科学与技术学院新疆生物资源基因工程重点实验室, 乌鲁木齐 830046)
  • 出版日期:2014-01-10 发布日期:2014-01-10

Effects of salt-alkali mixed stresses on seed germination of the halophyte Chenopodium glaucum L.

Gulnar Yasin, YANG Rui-rui, ZENG You-ling**   

  1. (Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China)
  • Online:2014-01-10 Published:2014-01-10

摘要: 灰绿藜广泛分布于新疆中低度盐碱地干旱区,属藜科1年生经济盐生植物。本实验研究了混合盐碱胁迫对灰绿藜种子萌发和萌发恢复的影响。结果表明:随着盐浓度和pH值的增高,灰绿藜的种子萌发率呈下降趋势;同一盐浓度不同pH处理的灰绿藜种子萌发率随pH值的升高而减少,同样,随着盐浓度和pH值的增加,灰绿藜种子的萌发速率均为下降;从各胁迫处理的种子萌发的幼苗的生长表型来看,盐浓度和pH值是两个重要的影响因素;将未萌发的种子转移至蒸馏水中复水后,最终萌发率达到90%以上,说明一定程度的混合盐碱胁迫对灰绿藜种子的萌发潜力没有太大的影响,并且萌发恢复率随着盐浓度的增加而增加;盐浓度、pH值及其相互作用对灰绿藜种子萌发有抑制作用;盐浓度是决定性的主导因素,pH值对灰绿藜种子萌发的影响次之;综上,混合盐碱胁迫对灰绿藜的种子萌发和萌发生长的表型均有明显的抑制作用。

Abstract: Chenopodium glaucum belonging to Chenopodiaceae is an annual economic halophyte which is widely distributed in the light saline and alkaline region, Xinjiang. We investigated the interactive effects of salt-alkali mixed stresses on its seed germination, germination recovery and growth phenotype of germinated seedlings. Seed germination percentage was significantly reduced with increasing salinity and pH and seed germination rate was also descent with increasing pH at a given salt concentration. Salinity and pH were also found to be the major factors influencing the growth phenotype of germinated seedlings of C. glaucum under the abovementioned corresponding treatments. Ungerminated seeds germinated well after being transferred to distilled water, with the final germination percentage being more than 90%, indicating that a certain degree of mixed salt-alkali stresses had almost no inhibitory influence on seed germination potential of C. glaucum, and the germination recovery percentage increased with increasing salt concentration. The two-way ANOVA analysis indicated that the seed germination of C. glaucum was significantly affected by salinity, pH and their interactions and salt was a decisive factor, and pH was a lesser one. In a word, the seed germination rate and growth phenotype of germinated seedlings of this species were inhibited by salinity and pH.