Pollination biology of Annona squamosa L. (Annonaceae): Evidence for pollination syndrome

► Hermaphroditic flower of A. squamosa exhibited protogynous dichogamy. ► Carpophilos domidiatus and C. hemipterous were identified as pollinators. ► Floral traits and specific reward system clearly exhibited obligate specialization. ► A. squamosa explicitly indicated canthrophilous pollination synd...

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Bibliographic Details
Published in:Scientia horticulturae 2012-09, Vol.144, p.212-217
Main Authors: Kishore, Kundan, Shukla, A.K., Babu, Naresh, Sarangi, D.N., Patanayak, Samiksha
Format: Article
Language:English
Subjects:
A. squamosa
Agronomy. Soil science and plant productions
Annona squamosa
anthers
Biological and medical sciences
Coleoptera
dehiscence
dichogamy
Fundamental and applied biological sciences. Psychology
Nitidulid beetles
Obligate specialization
ovules
pollen
pollination
Pollination syndrome
pollinators
Protogynous dichogamy
stigma
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Summary:► Hermaphroditic flower of A. squamosa exhibited protogynous dichogamy. ► Carpophilos domidiatus and C. hemipterous were identified as pollinators. ► Floral traits and specific reward system clearly exhibited obligate specialization. ► A. squamosa explicitly indicated canthrophilous pollination syndrome. Pollination biology of Annona squamosa was investigated in the context of functional specialization and pollination syndrome. Hermaphroditic flower exhibited protogynous dichogamy as stigma became receptive a day before anther dehiscence. Flowers produce moderately high number (16,280±324) of spherical and medium size (98.6μm×87.3μm) pollen with pollen/ovule ratio of 120.6. Nitidulid beetles; Carpophilos domidiatus and Carpophilos hemipterous were identified as pollinators in terms of visitation frequency, pollination potential index score and pollination efficiency. However C. hemipterous was relatively effective pollinator than C. domidiatus. Floral traits and specific reward system of A. squamosa clearly exhibit obligate specialization by filtering only C. hemipterous and C. domidiatus as pollinators and thereby explicitly indicating canthrophilous pollination syndrome.
ISSN:0304-4238
1879-1018
DOI:10.1016/j.scienta.2012.07.004