Photosynthetically Active Chloroplasts in Petunia Corollas

  • David Weiss
  • Mordechay Schonfeld
  • Abraham H. Halevy
Part of the NATO ASI Series book series (NSSA, volume 168)


Flower buds of most plants are initially green and their typical colors develop gradually during flower growth. The presence of Chi is usually not evident in mature flowers and it is assumed that chloroplasts present in the early stages are transformed into chromoplasts1. Photosynthetically active chloroplasts were previously reported to occur in flowers2,3, but in all these cases the petals examined were green. In the present work we found photosynthetically active chloroplasts in pink Petunia corollas during all flower developmental stages. The photosynthetic activity of the corolla chloroplasts was compared with chloroplasts from green leaves.


Green Leaf Photosynthetic Photon Flux Density Induction Time Methyl Viologen Shade Plant 


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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • David Weiss
    • 1
  • Mordechay Schonfeld
    • 1
  • Abraham H. Halevy
    • 1
  1. 1.Faculty of AgricultureThe Hebrew University of JerusalemRehovotIsrael

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