NDLI: Unexpectedly high outcrossing rate in both dense and sparse patches in self-compatible Pedicularis rex (Orobanchaceae)

Content Provider	Springer Nature Link
Author	Jing, Xia Hong, Liu Rui, Qin
Copyright Year	2012
Abstract	Pedicularis rex, a self-compatible alpine herb, depends exclusively on pollinators for reproduction. Previous study has revealed that 74.7 % of genetic variability occurs among populations in Yunnan, indicating a mixed mating system for the species. The large floral display also indicates high potential geitonogamy. Therefore, plant density and display size may be important factors influencing the realized mating system of P. rex. In the study reported here we explored the effects of plant density and floral display size on pollinator movements and thus outcrossing rate in two patches of in P. rex at low and high plant densities. We examined foraging behavior of bumblebees, measured reproductive outputs under hand and natural pollination, and estimated the outcrossing rates using RAPD markers. Floral display size was significantly larger and bumblebees visited significantly more flowers in sequence on individual plants in the sparse patch than in the dense patch. We found a significant positive correlation between floral display size and successive visits in the sparse patch, but not in the dense patch. Regression analysis revealed a significant inverse correlation between fruit production and flower production per plant with a theoretical maximum of 63 fruits per plant, but no relationship between seed production and flower production per plant. Contrary to previous studies on genetic structure, however, we found an unexpectedly high outcrossing rate in both the sparse and the dense patch (t m = 1.151 and 0.924, respectively). Resource limitation may intensify seed competition and result in selected seed abortion, which may largely explain the unexpectedly high outcrossing rate.
Starting Page	49
Ending Page	56
Page Count	8
File Format	PDF
ISSN	03782697
Journal	Plant Systematics and Evolution
Volume Number	299
Issue Number	1
e-ISSN	16156110
Language	English
Publisher	Springer Vienna
Publisher Date	2012-10-10
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Floral display size Geitonogamy Outcrossing rate Pedicularis rex Plant density Plant Sciences Plant Ecology Plant Anatomy/Development Plant Systematics/Taxonomy/Biogeography
Content Type	Text
Resource Type	Article
Subject	Plant Science Ecology, Evolution, Behavior and Systematics

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Erratum to: Unexpectedly high outcrossing rate in both dense and sparse patches in self-compatible Pedicularis rex (Orobanchaceae)

Erratum to: Unexpectedly high outcrossing rate in both dense and sparse patches in self-compatible Pedicularis rex (Orobanchaceae)

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Unexpectedly high outcrossing rate in both dense and sparse patches in self-compatible Pedicularis rex (Orobanchaceae)

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