The bracts oft he alpine ‚glasshouse’ plant Rheum alexandrae (Polygonaceae) enhance reproductive fitness of ist pollinating seed-consuming mutualist

Song, Bo and Stöcklin, Jürg and Peng, Deli and Gao, Yongqian and Sun, Hang. (2015) The bracts oft he alpine ‚glasshouse’ plant Rheum alexandrae (Polygonaceae) enhance reproductive fitness of ist pollinating seed-consuming mutualist. Botanical Journal of the Linnean Society, 179 (2). pp. 349-359.

Full text not available from this repository.

Official URL: http://edoc.unibas.ch/40700/

Downloads: Statistics Overview


Environmental conditions are known to affect the reproductive fitness of insects, as do host plants. Although the highly specialized bracts of Himalayan ‘glasshouse’ plants are thought to be an adaptive morphology that allows the plant to reproduce in harsh alpine environments, little information appears to exist concerning the benefit of these bracts for the pollinating insects. In this study, we examine whether the semi-translucent bracts of Rheum alexandrae, a giant herb endemic to the alpine zone of the Hengduan Mountains in south-western China, enhance the reproductive fitness of its pollinator. Rheum alexandrae depends mainly on mutualistic seed-consuming Bradysia flies for pollination. Bracts increased interior temperature on sunny days, acted as a buffer against fluctuating air humidity, greatly decreased the intensities of ultraviolet B/C radiation and provided shelter from strong winds. Bract removal significantly decreased adult oviposition and offspring performance of pollinators during flowering and fruiting, respectively. Our results indicate that the bracts of R. alexandrae enhance the reproductive fitness of its pollinating seed-consuming mutualist in alpine environments, which may be attributed to the positive effects of the bracts on the interior microenvironment.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Pflanzenökologie (Körner)
UniBasel Contributors:Stöcklin, Jürg
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Academic Press
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:13 Nov 2017 16:36
Deposited On:04 Aug 2016 09:07

Repository Staff Only: item control page