Host-specific races in the holoparasitic angiosperm Orobanche minor: implications for speciation in parasitic plants

Thorogood, Chris J.; Rumsey, Fred; Hiscock, Simon J.

doi:10.1093/aob/mcp034

Cited by 39 publications

(36 citation statements)

References 41 publications

(62 reference statements)

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“…Previous work has demonstrated the occurrence of adaptation and coevolution among parasitic plants and their hosts, with different populations or races forming more or less exclusive relationships with particular host species (de Vega et al, ; Thorogood, Rumsey, & Hiscock, ; Thorogood, Rumsey, Harris, & Hiscock, ). In additional work on Orobanche minor , Thorogood, Rumsey, Harris, and Hiscock () were able to distinguish groups of specialist and more generalist populations of the parasite using SCAR (sequence characterized amplified regions) molecular markers.…”

Section: Discussionmentioning

confidence: 99%

The contrasting roles of host species diversity and parasite population genetic diversity in the infection dynamics of a keystone parasitic plant

Rowntree

Craig

2018

Journal of Ecology

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Abstract1. Diversity among species and genetic diversity within species are both important components of ecological communities that can determine the outcome of species interactions, especially between hosts and parasites. We sought to understand the impact of species diversity on host community resistance to infection by a keystone parasitic plant (Rhinanthus minor L.) and genetic diversity of the parasite on its successful establishment in a grassland community.2. We used an experimental approach where large pots were planted with mixtures of mesotrophic grassland species at high and low species diversity. The parasitic plant was sown in a proportion of these with high and low genetic diversity treatments. Establishment of the parasite was monitored over 2 years and the pots harvested at the end of each growing season to determine the impact of infection on plant community biomass.3. We found a strong effect of host plant species diversity on the establishment of the parasitic plant, with successful establishment considerably lower in the high species diversity treatment. Genetic diversity appeared to promote establishment of the parasite in the high species diversity treatment, and also facilitated longer term fitness in the low species diversity treatment. Host community structure was influenced by R. minor, with grass relative biomass decreasing and legume relative biomass increasing when the parasite was present. There was no direct impact of the presence of the parasite on the relative biomass of nonleguminous forbs. 4.Synthesis. Our data demonstrate the importance of host community species diversity in deterring the establishment of a generalist parasite. They also highlight the role of genetic diversity in determining the outcome of host-parasite interactions in multispecies communities. These findings, therefore, have important implications for the establishment and management of species-rich grasslands and provide insight into the community dynamics of parasitic plants and their hosts.

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Section: Discussionmentioning

confidence: 99%

The contrasting roles of host species diversity and parasite population genetic diversity in the infection dynamics of a keystone parasitic plant

Rowntree

Craig

2018

Journal of Ecology

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“…Some broomrapes are rare botanical specimens, but several of them are among the most damaging agricultural pests. At present, over 73 million hectares of farmland are infested with broomrapes (1,3), which causes great economical losses (3,8,15,16,17,18,19,20,23,24).…”

Section: Introductionmentioning

confidence: 99%

Structural and Functional Biodiversity of Microbial Communities in the Rhizosphere of Plants Infected with Broomrapes (Orobanchaceae)

Hristeva¹,

Dekalska²,

Denev³

2013

Biotechnology & Biotechnological Equipment

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“…Parasitic plants can be classified as hemiparasites and holoparasites according to the extent to which they are unable to produce their own reduced carbon for growth and reproduction [1]. Unlike hemiparasites, holoparasites lack chlorophyll and are obligatory dependent on hosts for the organic and inorganic nutrition supplies through infecting both phloem and xylem of the hosts by the haustorium [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Stable carbon and nitrogen isotope signatures of root-holoparasiticCynomorium songaricumand its hosts at the Tibetan plateau and the surrounding Gobi desert in China

Yang

Peng

et al. 2012

Isotopes in Environmental and Health Studies

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We first measured the δ(13)C and δ(15)N values of root holoparasite Cynomorium songaricum and its hosts from 19 sites across four provinces in northwest China, in an attempt to investigate their nutritional relationship at the Tibetan plateau and the surrounding Gobi desert. Our study showed that the δ(13)C of C. songaricum closely mirrored the values of its hosts, Nitraria tangutorum and N. sibirica across all sampling sites. C. songaricum was significantly depleted in (13)C compared to host plants at the Tibetan plateau, showing an average parasite/host δ(13)C difference of-0.6 ‰. In contrast, (15)N of C. songaricum was significantly enriched by+1.3 ‰ compared to the hosts, implying that these holoparasites had other nitrogen resources. Although no difference in the δ(13)C and δ(15)N values between holoparasites and hosts was detected, the δ(13)C and δ(15)N values of holoparasites were significantly correlated with those of their hosts at the Gobi desert. The δ(13)C versus δ(15)N values were significantly but negatively correlated for the hosts; however, holoparasite/host variation in δ(13)C was not correlated with the variation in δ(15)N. The δ(13)C versus δ(15)N values were negatively correlated in C. songaricum, and this relationship tended to be magnified along the increasing elevations independent of the host plants. C. songaricum at the Tibetan plateau exhibited different δ(13)C and δ(15)N signatures compared with those at the Gobi desert. Furthermore, both δ(13)C and δ(15)N values of C. songaricum and its host plants in salt marshes at the Tibetan plateau were different from those in sand sites at the Tibetan plateau and the Gobi desert. Our results indicate that the isotopic difference depends on the different altitudes and habitats and is host-specific.

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Host-specific races in the holoparasitic angiosperm Orobanche minor: implications for speciation in parasitic plants

Cited by 39 publications

References 41 publications

The contrasting roles of host species diversity and parasite population genetic diversity in the infection dynamics of a keystone parasitic plant

The contrasting roles of host species diversity and parasite population genetic diversity in the infection dynamics of a keystone parasitic plant

Structural and Functional Biodiversity of Microbial Communities in the Rhizosphere of Plants Infected with Broomrapes (Orobanchaceae)

Stable carbon and nitrogen isotope signatures of root-holoparasiticCynomorium songaricumand its hosts at the Tibetan plateau and the surrounding Gobi desert in China

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