Seed dormancy-breaking in a cold desert shrub in relation to sand temperature and moisture

Huiliang Liu, Buhailiqiemu Abudureheman, Lingwei Zhang, Jerry M. Baskin, Carol C. Baskin, Daoyuan Zhang

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Seasonal periodicity of seed germination and its relationship to seasonal changes in temperature and soil moisture have been well studied in seeds of species with physiological dormancy. However, relatively little information is available on the role of these environmental factors in controlling germination of seeds with physical dormancy (PY). Our primary aim was to determine if seeds of the cold desert sand dune semi-shrub Eremosparton songoricum exhibits seasonal periodicity of seed germination and the relationship between seed dormancy break and soil temperature and moisture. In the laboratory, seeds incubated on dry, wet, wet-dry and dry-wet sand were exposed to a 1-year sequence of temperature regimes simulating those in the field. In the field, seeds were buriedat different depths on a sand dune, and germination of periodically exhumed seeds was tested at five temperature regimes during a 2-year period. In the 1-year sequence of simulated natural temperature regimes, breaking of PY was more effective under constantly wet than under constantly dry conditions, and germination percentage was significantly higher under dry-wet than under wet-dry conditions. Seeds buried in the field exhibited a distinct peak ofgermination in spring and little or no germination in other seasons. The final (2-year) monthly cumulative germination percentage differed among burial depths and temperature, and it was highest (47 %) in seeds buried at 3 cm and tested at 25/10 C. A seed cohort of E. songoricum likely exhibits a long-term annual periodicity of spring germination in the field, and dormancy break appears to be driven by low (winter) temperatures and relatively high sand moisture content. To our knowledge this is the first study to document seasonal periodicity in seed germination in a cold desert species with PY and to identify the mechanism (at the whole-seed level) of its occurrence.

Original languageEnglish
Article numberplx003
Issue number1
StatePublished - Jan 1 2017

Bibliographical note

Funding Information:
Funds for this study were provided by the National Natural Science Foundation of China (31660162, 31570529), the Scientific Service Project (TSS-2015-014-FW-4-3) and the West Light Foundation of the Chinese Academy of Sciences (XBBS201303).

Publisher Copyright:
© The Authors 2017.


  • Burial depth
  • Eremosparton songoricum
  • Fabaceae
  • Physical dormancy
  • Seed germination phenology
  • Wet-dry cycles

ASJC Scopus subject areas

  • Plant Science


Dive into the research topics of 'Seed dormancy-breaking in a cold desert shrub in relation to sand temperature and moisture'. Together they form a unique fingerprint.

Cite this