Effect of Growth Temperature on Aster Flower Development

M. Oren-Shamir*, L. Shaked-Sachray, A. Nissim-Levi, D. Weiss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Little is known about the effect of growth temperature on Aster (Compositae, Asteraceae) flower development. In this study, we report on this effect for two aster lines, 'Suntana' and 'Sungal'. Growth temperature had a dramatic effect on the duration of flower development, ranging from 22 days for plants growing at 29 °C up to 32 days for plants grown at 17 °C. Flower longevity was ≈40% shorter under the higher temperature for both lines. Growth temperature also affected flowerhead form: 'Suntana' flowerhead diameter was 20% larger at 17 °C than at 29 °C. The number of 'Sungal' florets per flowerhead was four times greater at the lower temperature. Shading (30%) under temperature-controlled conditions had no effect on any of the parameters measured. For plants grown outdoors, our results suggest that shading plants may increase quality by reducing the growth temperature.

Original languageAmerican English
Pages (from-to)28-29
Number of pages2
JournalHortscience: A Publication of the American Society for Hortcultural Science
Issue number1
StatePublished - Feb 2000


  • Aster sp
  • Flower induction
  • Flower longevity
  • Flower morphology
  • Shading


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