Effect of daylength on flowering and seed morphology of Spergularia diandra occurring in the Negev Desert Israel

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Abstract

Spergularia diandra is a common annual plant in the deserts of Israel. It displays a quantitative long-day response to flowering. The longer the daylength, from 8 to 18 h, the earlier the time of flowering. Tiny wind-dispersed seeds, which mature on plants under these daylengths, differed in their seed coat structure and size. In addition, in natural populations nine types of seeds were found: three plant genotypes with smooth, hairy or partially hairy seeds; and within each genotype there are three seed phenotypes: black, brown and yellow. The flowering and 'escape' strategy of seed dispersal diversity are discussed.

Original languageEnglish
Pages (from-to)611-622
Number of pages12
JournalJournal of Arid Environments
Volume36
Issue number4
DOIs
StatePublished - 1 Jan 1997

Keywords

  • Daylength
  • Escape strategy
  • Flowering
  • Genotypes
  • Seed coat structure
  • Wind dispersal

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