Breeding system and inbreeding depression in the clonal plant species Knautia arvensis (Dipsacaceae): implications for survival in abandoned grassland

Vange, Vibekke

doi:10.1016/s0006-3207(02)00090-3

Cited by 39 publications

(30 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The herb K. arvensis is gynodioecious (populations composed of females and hermaphrodites) and selfcompatible (Vange 2002). In my study population, females and hermaphrodites produced a similar number of inflorescences (7.0±6.4, n=161 vs. 6.5±4.9, n=240; t-test, t=0.86, P=0.388).…”

Section: Methodsmentioning

confidence: 64%

“…Autogamy (viz. within-flower pollination) and withininflorescence geitonogamy seem to be prevented by protandry (Vange 2002). Pollinator-mediated betweeninflorescence geitonogamous self-pollination occurs in K. arvensis, hence the possible advantages of gynodioecy.…”

Section: Methodsmentioning

confidence: 99%

“…58%) in K. arvensis (Vange 2002), there is a potential for selection favouring pollinators that visit few inflorescences per plant individual. When foraging in a population of a plant species, bumblebees and solitary bees usually move to the nearest-neighbouring inflorescence (Zimmerman 1979;Colevatti et al 2000), thus potentially contributing to geitonogamous selfing.…”

Section: Visitor Groupmentioning

confidence: 99%

See 2 more Smart Citations

Higher pollinator effectiveness by specialist than generalist flower-visitors of unspecialized Knautia arvensis (Dipsacaceae)

Larsson

2005

Oecologia

105

View full text Add to dashboard Cite

A critical issue in pollination ecology is the evolution of generalist pollination systems, and under which conditions floral specializations evolve from these. The gynodioecious herb Knautia arvensis (Dipsacaceae) exhibits a generalized pollination system, but is visited by both generalist and specialist flower-visitors. The present study tested pollinator effectiveness and pollinator importance of the pollen specialist solitary bee Andrena hattorfiana (Andrenidae) vs. the generalist flower-visitors to K. arvensis on the island of Oland, SE Sweden. Females of the specialist bee removed more pollen per inflorescence-visit than the major groups of generalist visitors such as bumblebees and flies. They also deposited more pollen per inflorescence-visit than any of the generalist visitor groups. The females have a preference for pollen-presenting vs. stigma-presenting inflorescences, a pattern shared with most of the generalist flower-visitors. Females of the specialist exert such a strong preference that they, despite their great pollinator effectiveness, make modest contribution to pollen transfer in K. arvensis. The females of A. hattorfiana accounted for 14.2% of the overall visits and 5.8% of the total pollination, the rest being performed by generalist visitors and males of A. hattorfiana. This study shows that pollinator effectiveness of a specialist can be superior while generalist flower-visitors select floral characters towards generalization through their greater contribution to overall pollen flow.

show abstract

Section: Methodsmentioning

confidence: 64%

Section: Methodsmentioning

confidence: 99%

Section: Visitor Groupmentioning

confidence: 99%

See 1 more Smart Citation

Higher pollinator effectiveness by specialist than generalist flower-visitors of unspecialized Knautia arvensis (Dipsacaceae)

Larsson

2005

Oecologia

105

View full text Add to dashboard Cite

show abstract

“…[66]. Similarly, Vange [41] stressed that pollen limitation (quantitative and/or qualitative) activate cascade of reactions; problems in sexual reproduction limit seed set; shortage of seeds aggravate seedling recruitment and establishment. Lack of seed rain or transient seed bank are considered as critical for colonization or re-colonization of open areas by many grassland species [60,67].…”

Section: Discussionmentioning

confidence: 99%

“…decreasing pollen viability or low pollen-tube survival [25,[34][35][36][37][38]. Disorders in the complement of male and/or female function are particularly severe for small isolated populations and may deepen their weakening by the spread of inbreeding depression [39][40][41][42]. However, still little is known about variation in pollen productivity among or within populations.…”

Section: Introductionmentioning

confidence: 99%

Does vegetation impact on the population dynamics and male function in Anemone sylvestris L. (Ranunculaceae)? A case study in three natural populations of xerothermic grasslands

Denisow

Wrzesień

2015

Acta Soc Bot Pol

View full text Add to dashboard Cite

In Poland, like in other parts of Central Europe, dry grasslands significantly contribute to the biodiversity of both fauna and flora. Anthropogenic pressure impair many species of xerothermic habitats, and several populations face an increased risk of extinction. The goal of the study was to define factors that may affect the size of wild populations of Anemone sylvestris L., a protected species in Poland, with both a short-and long-term perspective, and to examine the influence of vegetation changes on the density, the abundance of flowering and male function (pollen production, pollen viability), as well as seed set. In situ observations were performed in 2005-2006 and 2011-2012 in three populations located on the Lublin Upland, SE Poland. The reduction in population density and A. sylvestris blooming was exacerbated by the expansion of the shrubs, but not by Brachypodium pinnatum. Male characteristics of A. sylvestris, i.e. pollen amount per multi-staminate flowers or pollen viability appeared to decrease under pressure of shrub competition. Populations with limitation of male function had impaired degree of seed set. Various consequences for the functioning of populations within a metapopulation system can be expected due to substantial qualitative and quantitative disorders in pollen traits. It is crucial that successful recovery programs for A. sylvestris primary should aim to conserve and manage the habitat.

show abstract

Dipsacaceae (inclusive Triplostegia)

Mayer

2016

Flowering Plants. Eudicots

View full text Add to dashboard Cite

Breeding system and inbreeding depression in the clonal plant species Knautia arvensis (Dipsacaceae): implications for survival in abandoned grassland

Cited by 39 publications

References 49 publications

Higher pollinator effectiveness by specialist than generalist flower-visitors of unspecialized Knautia arvensis (Dipsacaceae)

Higher pollinator effectiveness by specialist than generalist flower-visitors of unspecialized Knautia arvensis (Dipsacaceae)

Does vegetation impact on the population dynamics and male function in Anemone sylvestris L. (Ranunculaceae)? A case study in three natural populations of xerothermic grasslands

Dipsacaceae (inclusive Triplostegia)

Contact Info

Product

Resources

About