How portulaca seedlings avoid their neighbours

Ariel Novoplansky, Dan Cohen, Tsvi Sachs

Research output: Contribution to journalArticlepeer-review

99 Scopus citations


Portulaca oleracea L. seedlings do not develop in the direction of neighbours, even when these neighbours are small and distant. Neighbouring plants could be simulated by small rectangles of a plastic that resembled leaves in its spectral characteristics. Unlike seedlings, mature plants did not respond to objects that do not influence photosynthetic light. When light of equal intensity was received from all directions, Portulaca seedlings avoided the direction with higher far-red light. Portulaca is thus able to use spectral composition and direction of light as clues for the probability of the direction of future shade.

Original languageEnglish
Pages (from-to)490-493
Number of pages4
Issue number4
StatePublished - 1 Apr 1990
Externally publishedYes


  • Developmental plasticity
  • Environmental signals
  • Far-red light
  • Phytochrome
  • Plant competition
  • Portulaca oleracea L.

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics


Dive into the research topics of 'How portulaca seedlings avoid their neighbours'. Together they form a unique fingerprint.

Cite this