Nectar Secretion Dynamic Links Pollinator Behavior To Consequences For Plant Reproductive Success In The Ornithophilous Mistletoe Psittacanthus Robustus

dc.creatorGuerra T.J.
dc.creatorGaletto L.
dc.creatorSilva W.R.
dc.date2014
dc.date2015-06-25T17:52:09Z
dc.date2015-11-26T14:14:12Z
dc.date2015-06-25T17:52:09Z
dc.date2015-11-26T14:14:12Z
dc.date.accessioned2018-03-28T21:15:03Z
dc.date.available2018-03-28T21:15:03Z
dc.identifier
dc.identifierPlant Biology. Blackwell Publishing Ltd, v. 16, n. 5, p. 956 - 966, 2014.
dc.identifier14358603
dc.identifier10.1111/plb.12146
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84906055685&partnerID=40&md5=a32560d3f48a193a7594450680842785
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/86225
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/86225
dc.identifier2-s2.0-84906055685
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1242475
dc.descriptionThe mistletoe Psittacanthus robustus was studied as a model to link flower phenology and nectar secretion strategy to pollinator behaviour and the reproductive consequences for the plant. The bright-coloured flowers presented diurnal anthesis, opened asynchronously throughout the rainy season and produced copious dilute nectar as the main reward for pollinators. Most nectar was secreted just after flower opening, with little sugar replenishment after experimental removals. During the second day of anthesis in bagged flowers, the flowers quickly reabsorbed the offered nectar. Low values of nectar standing crop recorded in open flowers can be linked with high visitation rates by bird pollinators. Eight hummingbirds and two passerines were observed as potential pollinators. The most frequent flower visitors were the hummingbirds Eupetomena macroura and Colibri serrirostris, which actively defended flowering mistletoes. The spatial separation between anthers, stigma and nectar chamber promotes pollen deposition on flapping wings of hovering hummingbirds that usually probe many flowers per visit. Seed set did not differ between hand-, self- and cross-pollinated flowers, but these treatments set significantly more seeds than flowers naturally exposed to flower visitors. We suggest that the limitation observed in the reproductive success of this plant is not related to pollinator scarcity, but probably to the extreme frequency of visitation by territorial hummingbirds. We conclude that the costs and benefits of plant reproduction depend on the interaction strength between flowers and pollinators, and the assessment of nectar secretion dynamics, pollinator behaviour and plant breeding system allows clarification of the complexity of such associations. © 2014 German Botanical Society and The Royal Botanical Society of the Netherlands.
dc.description16
dc.description5
dc.description956
dc.description966
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dc.languageen
dc.publisherBlackwell Publishing Ltd
dc.relationPlant Biology
dc.rightsfechado
dc.sourceScopus
dc.titleNectar Secretion Dynamic Links Pollinator Behavior To Consequences For Plant Reproductive Success In The Ornithophilous Mistletoe Psittacanthus Robustus
dc.typeArtículos de revistas


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