Changes in Catecholamine Levels in Short Day-Induced Cotyledons of Pharbitis nil

Masayuki Suzuki 1 , Masaya Mizoguchi 2 , Fumihiko Yano 2 , Utako Hara 2 , Mineyuki Yokoyama 3  and Naoharu Watanabe 2
  • 1 United Graduate School of Agricultural Science, Gifu University (Shizuoka University), 836 Ohya, Shizuoka 422Ð8529, Japan
  • 2 Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, Ohya, Shizuoka 422–8529, Japan
  • 3 Basic Resarch Center, Shiseido Co. Ltd., Yokohama 224-8558, Japan

We investigated the effects of catecholamine on flower-induction in P. nil (cv. Violet). GCSIM analysis identified dopamine for the first time in P. nil seedlings. Dopamine levels in the cotyledons did not show a significant change during the inducing dark treatment. The dopamine content of cotyledons exposed to various durations of darkness were 0.1-0.2 nmol/ g fresh weight. The same content was found when cotyledons were exposed to continuous light.

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A Journal of Biosciences: Zeitschrift für Naturforschung C (ZNC) is an international scientific journal for the emerging field of natural and natural-like products. ZNC publishes original research on the isolation, bio-chemical synthesis and bioactivities of natural products, their biochemistry, pharmacology, biotechnology, and biological activity and innovative developed computational methods for predicting their structure and/or function.