Pollen Transfer by Hummingbirds and Bumblebees, and the Divergence of Pollination Modes in Penstemon

Castellanos, María Clara; Wilson, Paul; Thomson, James D.

doi:10.1554/03-215

Cited by 52 publications

(70 citation statements)

References 41 publications

(14 reference statements)

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“…Now suppose that a population of this bee adapted Aquilegia was invaded by a hummingbird with a similar tongue length to that of the bee, a perfectly reasonable scenario. Under these circumstances, hummingbird pollination may be as good as, or more effective than bee pollination (Castellanos et al, 2003). Co-evolution between Aquilegia and the hummingbird could therefore occur in the presence of the bee.…”

mentioning

confidence: 99%

Floral evolution: Spurred on by pollinators

Ennos¹

2007

Heredity

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mentioning

confidence: 99%

Floral evolution: Spurred on by pollinators

Ennos¹

2007

Heredity

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“…A vantagem evolutiva para as plantas que são polinizadas por estas aves é que, ao contrário das abelhas, as primeiras não coletam pólen para consumo, permitindo que a transferência seja mais rápida e com menos desperdício de pólen (ver Castellanos et al 2003).…”

Section: Discussionunclassified

Biologia floral e visitantes de Gaylussacia brasiliensis (Spr.) Meissner (Ericaceae) - uma espécie com anteras poricidas polinizada por beija-flores

2011

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Biologia fl oral e visitantes de Gaylussacia brasiliensis (Spr.) Meissner (Ericaceae) -uma espécie com anteras poricidas polinizada por beija-fl ores ABSTRACT(Floral biology and visitors of Gaylussacia brasiliensis (Spr.) Meissner (Ericaceae) -a poricidal anther species pollinated by hummingbirds). The floral biology of Gaylussacia brasiliensis (Spr.) Meissner (Ericaceae) was studied on swampy edges of a gallery forest in Uberlandia, Minas Gerais. Gaylussacia brasiliensis is a shrub 0.3 to 3.0 m tall that occurs isolated or aggregated and has continuous flowering. The axillary racemose inflorescences produce four to dozens of pendulous flowers. The flowers are hermaphroditic, red, urceolate, odorless and have diurnal anthesis. Concentration of sugars in nectar was c. 13% and volume c. 3.0 μL. G. brasiliensis is a self-compatible, non apomictic species, which does not present spontaneous self-pollination. The pollinators of G. brasiliensis were the hummingbirds: Chlorostlibon lucidus (Shaw), Amazilia fimbirata (Gmelin), Hylocharis chrysura (Shaw) (Trochilinae) and Phaethornis pretrei (Lesson & DeLattre) (Phaethornithinae). G. brasiliensis has poricidal anthers with ample pores and the hummingbirds, while hovering with the bill inserted into the flowers to search for nectar, promote enough vibration in the anthers to permit pollen-grain release. Although presenting relatively low nectar volume and sugar content, the clusters of individuals with many flowers seem to attract territorial hummingbirds.

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“…Records of visits to melon flowers revealed that A. mellifera spent significantly more time visiting each flower than X. pubescens. Visit duration to melon flowers is expected to correlate positively with pollination efficiency, because bees may collect more pollen from a flower the longer they stay in it (Castellanos, 2003;Kudo, 2003). The difference in visit duration thus suggests a possible advantage to A. mellifera in pollination.…”

Section: Discussionmentioning

confidence: 99%

The Carpenter BeeXylocopa pubescensas an Agricultural Pollinator in Greenhouses

2007

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-Many greenhouse crops depend on bees for pollination. Global declines of honeybee populations, and their limited efficiency in pollinating some greenhouse food-plants, motivate the search for additional pollinators. We evaluated the carpenter bee X. pubescens, a local species to Israel, as a pollinator of greenhouse-grown honeydew melons, in comparison to honeybees. We recorded the bees' daily and seasonal activity patterns in relation to floral nectar levels, frequencies and durations of flower visits, and fruit quantity and quality. The bees' daily foraging schedule on melon did not correlate with nectar yield and nectar production patterns by the flowers. Visit durations per flower were shorter for X. pubescens than for honeybees. Pollination by both bees resulted in similar fruit mass and seed numbers, but X. pubescens pollination increased fruit set threefold as compared to honeybee pollination. We conclude that X. pubescens can effectively pollinate melons in enclosures.carpenter bee / greenhouse / honeybee / honeydew melon / pollination

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Pollen Transfer by Hummingbirds and Bumblebees, and the Divergence of Pollination Modes in Penstemon

Cited by 52 publications

References 41 publications

Floral evolution: Spurred on by pollinators

Floral evolution: Spurred on by pollinators

Biologia floral e visitantes de Gaylussacia brasiliensis (Spr.) Meissner (Ericaceae) - uma espécie com anteras poricidas polinizada por beija-flores

The Carpenter BeeXylocopa pubescensas an Agricultural Pollinator in Greenhouses

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