There is no science without fancy, and no art without facts.
Vladimir Nabokov (1899-1977)
Family name index
Cirsium japonicum (Asteraceae)
Please cite the URL of this page when you use the photographs from the
database. If you use photographs from the database in a public work or
you have any queris, please contact us in advance.
Welcome to the Floral Fluorescence Database.
Pollen and/or anther of a number of plant flowers show blue fluoresccence
under UV light. Major colour of fluorescence is blue although some pollens
and/or anthers show green or yellow fluorescence. H. Fukui, Professor emeritus
of Kagawa University, took many photographs of flowers under UV light.
This site provides photographs of about 580 plants. Several photographs
taken by S. Mori are also included. You can comprehensively search plants
by its scientific name and Japanese name from upper box. Familial classification
of plants is based on APG III (2009). Almost all of the photographs were
taken with a digital single lens reflex camera "Nikon D300" under
a fluorescent light and a black light (UV 365 nm) in the darkroom.
Why do many pollens and/or anthers emit fluorescence? Anthers usually
extend beyond the corolla, and genes in pollen are exposed to the risk
of damage from solar UV irradiation. Fluorescent compounds may protect
genes in pollen from the UV light through emission of heat and fluorescence.
Another role of fluorescence from pollen and anther may be attracting insects
as pollinators, while, for insects, the fluorescence may be a marker of
food, assuming that insects can recognize such fluorescence. We are studying
the property of fluorescent compounds and the behaviour of insects to confirm
the above hypothesis.
, Nobuhiro Hirai2
, Shinnosuke Mori2
, Katsumi Goto3
, Junji Toyoda4
, and Junko Tsukioka3
Professor Emeritus of Kagawa University, 2
Graduate Schoool of Agriculture, Kyoto University, 3
The Garden of Medicinal Plants, Kyoto Pharmaceutical Univeristy, 4
Creative Office Yutaka)
Biography of Hiroshi Fukui Ph.D. (1941-2013)
1941 Born in Kyoto
1970 Assistant Professor, Kyoto University
1971 Ph.D., Kyoto University
1978 Associate Professor, Kyoto University
1991 Professor, Kagawa University
2007 Professor Emeritus of Kagawa University