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Journal of Plant Research

, Volume 114, Issue 4, pp 411–422 | Cite as

Intraspecific Variation of Floral Scent Chemistry in Magnolia kobus DC. (Magnoliaceae)

  • Hiroshi Azuma
  • Masao Toyota
  • Yoshinori Asakawa

Magnolia kobus

was examined at 32 sites in Japan (109 female-stage flowers from 52 plants) by GC-MS. Major chemical compounds (a total of 36 chemicals) emitted from the flowers were: linalool (and its oxides), limonene, cis- and trans-β-Ocimene, benzaldehyde, benzyl alcohol, benzyl cyanide, and 2-aminobenzaldehyde. Linalool and its oxides were the most abundant components of floral scents in 21 individuals. The rate at which chemical volatiles were emitted ranged from 0.002 to 0.929 μg/flower/hour (average 0.211). High quantitative and qualitative variation in floral scent chemistry among individuals was found throughout the range of M. kobus, especially in central Honshu. The high variability in floral scent chemistry may be due to the importance of visual cues in the reproductive biology of M. kobus which flowers in early spring, resulting in decreased selection for specific floral scent profiles. Alternatively, different scent compounds or chemical profiles may be equally effective in attracting pollinators.

Keywords: Chemical variation, Floral scent, Floral volatile, Magnolia, Linalool 

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Copyright information

© The Botanical Society of Japan 2001

Authors and Affiliations

  • Hiroshi Azuma
    • 1
  • Masao Toyota
    • 2
  • Yoshinori Asakawa
    • 2
  1. 1.Department of Botany, Graduate School of Science, Kyoto University, Kyoto, 606–8502 JapanJP
  2. 2.Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, 770–8514 JapanJP

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