ecology and reproductive biology of Canarium strictum Roxb. from
evergreen forests of Central Western Ghats, India
Kumar, R.K. Somashekar*, B.C. Nagaraja and D. Shivaprasad
Environmental Science, Bangalore University, Bangalore ? 560 056, India
Author E-mail: email@example.com
30 May 2014
29 September 2014
03 December 2014
08 December 2014
and reproductive biology of a dioecious tree Canarium strictum Roxb.
(Burseraceae) was extensively studied within the Agumbe forest range of
Western Ghats, Karnataka to identify primary pollen vectors and to enumerate
interrelationship with the pollinators. The study also investigated
phenology, floral biology, pollen production, pollen viability, stigma
receptivity and nectar production. Trees produced functionally unisexual
flowers with white petals, organized densely on inflorescences. Staminate
flowers produced high percentage of viable pollen and relatively abundant
nectar (15.75 ?l) as a reward to the pollinators, while pistillate flowers
produced only nectar (12 ?l). Successful fruit set with wind pollination was
facilitated by synchronization of ﬂowering male and female trees, long
term receptivity of stigma in female flowers and extended lifespan of flowers.
The highest mean percent of fruit set with hand cross-pollination (?=91.06)
suggests the influence of local male tree density, as well as, frequency and
abundance of pollinator community on fruit set by open pollination.
systems, Dioecism, Heterostyly, Phenology
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