Ecological variability in the germination response to temperature of indigenous populations of foeniculum vulgare mill., in Israel

A. Fait, O. Barazani, S. Diemenstein, J. Friedman, N. Dudai, E. Putievsky

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Foeniculum vulgare Mill. (Apiaceae) is a perennial hemicryptophyte native of the Mediterranean basin. In Israel, natural populations are distributed across different habitats and phytogeographical territories. To evaluate the occurrence of intra-specific adaptive traits, we studied the germination of mericarps, collected along a rainfall/altitude gradient, in response to constant and alternating temperatures. Germination response to the different temperature regimes was population specific (p<0.OO1), either when expressed as final percentage of germination (%G) or as germination rate (G50 and probability density functions). Southern-distributed populations exhibited higher %G as compared to northern ones under all temperature regimes. This in spite of the overall 50% decrease in %G at warmer constant and alternating temperatures that characterized the first. Temperature fluctuations prolonged the germination period of all populations by two to seven days, as compared to constant temperatures (7-13 days period), and populations responded differently to different fluctuation's factors, e.g. temperature amplitude, minimum andlor maximum temperature. Significant associations between germination (%G) and environmental variables was found e.g., January temp. (r= 0.62 to 0.70), rainfall (r= -0.58 to -0.84) and altitude (r= Ca. -0.7). Weight of mericarp varied significantly (p<O.Ol) among populations, with heavier fruits developing at rainier sites (r= 0.7); this had no influence on germination. Variability in the germination response to temperature of mericarps from different habitats suggests the presence of population-specific adaptive traits in response to environmental pressure. Whether these are exclusively the result of parental effect or of the interaction between edaphic conditions and genetic-determined germination characters, remains to be determined.

Original languageEnglish
Title of host publicationXXV International Horticultural Congress, Part 7
Subtitle of host publicationQuality of Horticultural Products
PublisherInternational Society for Horticultural Science
Number of pages11
ISBN (Print)9789066058132
StatePublished - 1 Jan 2000
Externally publishedYes

Publication series

NameActa Horticulturae
ISSN (Print)0567-7572


  • Ecological variability
  • Fennel
  • Foeniculum vulgare var. vulgare
  • Germination
  • Israel
  • Plant populations
  • Temperature

ASJC Scopus subject areas

  • Horticulture


Dive into the research topics of 'Ecological variability in the germination response to temperature of indigenous populations of foeniculum vulgare mill., in Israel'. Together they form a unique fingerprint.

Cite this