Changes in Levels of Bioactive Substances in Stem Bases of Orchardgrass after Defoliation

DOI JASI Web Site 22 References
  • YAMAMOTO Shinro
    Laboratory of Environmental Botany, Obihiro University of Agriculture and Veterinary Medicine
  • GOTO Ken
    Laboratory of Environmental Botany, Obihiro University of Agriculture and Veterinary Medicine

Bibliographic Information

Other Title
  • 刈取り後のオーチャードグラス茎基部における生理活性物質レベルの変化

Search this article

Abstract

Exogenously applied gibberellic acid, cytokinins and cyclic adenosine monophosphate (cAMP) are known to enhance phleinase induction in stem bases of orchardgrass, while abscisic acid (ABA) to suppress, and auxin and ethylene to have no influence on it in our previous study (Yamamoto and Mino, 1998). The present study measured the changes in levels of the bioactive substances in stem bases of orchardgrass after defoliation. Free gibberellin activity in the stem bases decreased after defoliation, and the bound one remained unchanged. No significant change in ABA activity was detected in the defoliated stem bases. Cytokinin activity and zeatin concentration decreased after defoliation. cAMP concentration also decreased after defoliation. All the directions of these changes were contradictory to the idea that these bioactive substances are involved in phleinase induction in the stem bases of orchardgrass after defoliation.

Journal

References(22)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top