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Biologia Plantarum

, Volume 31, Issue 2, pp 139–144 | Cite as

Abscisic acid as a potent regulator of the transition from juvenile to mature stage inXanthium strumarium

  • V. Z. Podolnyi
  • Zuzana Josefusova
  • Ina F. Khmelnitskaya
  • S. P. Verenchikov
  • J. Krekule
  • M. Kh. Chailakhyan
Article

Abstract

The cotyledons ofXanthium strumarium plants are of low sensitivity to photoperiodic treatment and contain only trace amounts of ABA under long-day conditions. The first pair of leaves, very sensitive to photoperiodic treatment, contains a higher level ofABA, decreasing with age of the plant. Prolonged short-day photoperiodic treatment increases the ABA level in the cotyledons but this is still 10times lower than in the first two leaves. Exogenous 10−4M ABA increases the ABA level in the cotyledons to the level corresponding to that in the first leaves, and enhances the photoperiodic sensitivity of cotyledons. In contrast to cotyledons, the photoperiodic treatment affects the ABA level in the first pair of leaves only slightly. The authors propose that a high ABA level supports the transition of plants to flowering, while a low ABA level may be responsible for a low photoperiodic sensitivity of cotyledons inXanthium plants.

Keywords

Abscisic Acid Xanthium Photoperiodic Sensitivity Chenopodium Rubrum Photoperiodic Treatment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Academia 1989

Authors and Affiliations

  • V. Z. Podolnyi
    • 1
  • Zuzana Josefusova
    • 2
  • Ina F. Khmelnitskaya
    • 1
  • S. P. Verenchikov
    • 1
  • J. Krekule
    • 2
  • M. Kh. Chailakhyan
    • 1
  1. 1.Institute of Plant Physiology of the USSR Academy of SciencesMoscow
  2. 2.USSR, and Institute of Experimental BotanyCzechoslovak Academy of SciencesPraha 6Czechoslovakia

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