NDLI: Mechanical damage to pollen aids nutrient acquisition in Heliconius butterflies (Nymphalidae)

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Arthropod-Plant Interactions : Volume 3, Issue 3, September 2009

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Mechanical damage to pollen aids nutrient acquisition in Heliconius butterflies (Nymphalidae)

Content Provider	Springer Nature Link
Author	Krenn, Harald W. Eberhard, Monika J. B. Eberhard, Stefan H. Hikl, Anna Laetitia Huber, Werner Gilbert, Lawrence E.
Copyright Year	2009
Abstract	Neotropical Heliconius and Laparus butterflies actively collect pollen onto the proboscis and extract nutrients from it. This study investigates the impact of the processing behaviour on the condition of the pollen grains. Pollen samples (n = 72) were collected from proboscides of various Heliconius species and Laparus doris in surrounding habitats of the Tropical Research Station La Gamba (Costa Rica). Examination using a light microscope revealed that pollen loads contained 74.88 ± 53.67% of damaged Psychotria pollen, 72.04 ± 23.4% of damaged Psiguria/Gurania pollen, and 21.35 ± 14.5% of damaged Lantana pollen (numbers represent median ± first quartile). Damaged pollen grains showed deformed contours, inhomogeneous and/or leaking contents, or they were empty. Experiments with Heliconius and Laparus doris from a natural population in Costa Rica demonstrated that 200 min of pollen processing behaviour significantly increased the percentage of damaged pollen of Psychotria compared to pollen from anthers (P = 0.015, Z = −2.44, Mann–Whitney U-test). Examination of pollen loads from green house reared Heliconius butterflies resulted in significantly greater amounts of damaged Psiguria pollen after 200 min of processing behaviour compared to pollen from flowers (P < 0.001, Z = −4.583, Mann–Whitney U-test). These results indicate that pollen processing functions as extra oral digestion whereby pollen grains are ruptured to make the content available for ingestion.
Starting Page	203
Ending Page	208
Page Count	6
File Format	PDF
ISSN	18728855
Journal	Arthropod-Plant Interactions
Volume Number	3
Issue Number	4
e-ISSN	18728847
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-08-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pollen feeding Extra oral digestion Heliconius Butterfly Lepidoptera Plant Pathology Behavioural Sciences Ecology Plant Sciences Invertebrates Entomology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Insect Science Agronomy and Crop Science

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