Population Diversity and Dynamics of Parasitic Weeds

Román, Belén

doi:10.1007/978-3-642-38146-1_19

Cited by 6 publications

(9 citation statements)

References 33 publications

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“…Host range and host preference have been used to differentiate broomrape races and populations (Parker 2013;Román 2013). Nonetheless, infestation by parasitic weeds depends on their ability to successfully perform a series of developmental and metabolic steps during their interaction with a host (Joel 2000).…”

Section: The Effect Of Germination Stimulants In Vitromentioning

confidence: 99%

“…Differences in the response of O. cumana populations in Israel to sunflower root exudates have been shown by Joel et al (2011), and a new virulent race of O. cumana has also been reported in this country (Eizenberg et al 2004), suggesting a polymorphic nature for O. cumana. Genetically distant gene pools of O. cumana, derived from separate introduction events, are known in almost all sunflower-growing countries (Calderón-González et al 2019;Fernández-Martínes et al 2008;Martín-Sanz et al 2016;Molinero-Ruiz et al 2014;Pineda-Martos et al 2013;Román 2013). Increased virulence of O. cumana, due to changes in seed responsiveness to stimulants, may result from admixtures of O. cumana populations (Martín-Sanz et al 2016;Román 2013).…”

Section: The Effect Of Germination Stimulants In Vitromentioning

confidence: 99%

“…Data regarding intraspecific changes in the host specificity of Orobanche species have recently accumulated, describing attacks on new hosts and extending the distribution areas of the parasites (reviewed by Dor et al 2014). The intrapopulation variability may change through seed inputs from other populations (Román 2013), contributing to host-range expansion. Low intrapopulation variability of O. cumana in Europe was described 30 yr ago (Gagne et al 1998), but some broomrapes have been recently reported to differ in their virulence toward certain crop cultivars (Péres-Vich et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Host-induced selection is one of the most important selective forces in parasitic weeds and may lead to changes in host specificity (Román 2013). Differences in the chemical composition of host root exudates are important selection factors in the evolution of parasitic weeds (Román 2013;Thorogood et al 2009aThorogood et al , 2009b. Most germination stimulants belong to a small class of carotenoid-derived compounds named strigolactones (SLs) (Bouwmeester et al 2007;Xie et al 2010;Yoneyama et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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A new race of sunflower broomrape (Orobanche cumana) with a wider host range due to changes in seed response to strigolactones

et al. 2019

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Broomrapes (Orobanche and Phelipanche species, Orobanchaceae) are obligate root parasites of dicotyledonous plants. This taxonomic group includes seven weedy parasites of agricultural crops that damage vegetables, sunflower (Helianthus annuus L.), and legumes. Processing-tomato (Solanum lycopersicum L.) fields in Israel have been recently found infested with a new broomrape, first identified as nodding broomrape (Orobanche cernua Loefl.) based on its host. However, its morphology resembled the closely related sunflower broomrape (Orobanche cumana Wallr.), an obligate parasite of sunflower. The new race (CUCE) parasitized sunflower, tomato, and tobacco (Nicotiana tabacum L.) in vitro, in a polyethylene bag system and in pots. Its seeds germinated in response to strigolactones (orobanchol, 5-deoxystrigol, 2′-epiorobanchol, and GR24) and dehydrocostus lactone (DCL), whereas O. cumana seeds responded only to DCL and GR24, and O. cernua only to strigolactones. Based on morphological similarities with O. cumana, shared molecular markers with O. cumana, ability to parasitize sunflower and respond to sunflower-germination stimulants, it was concluded that CUCE is a new race of O. cumana, with a host range expanding to Solanaceae crops. While being an important noxious weed of sunflower, this new O. cumana race is currently spreading and posing a threat to processing tomato in Israel. This finding is an alarming indication that broomrapes can shift host range and that similar new races of O. cumana could potentially appear in other countries.

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Section: The Effect Of Germination Stimulants In Vitromentioning

confidence: 99%

Section: The Effect Of Germination Stimulants In Vitromentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A new race of sunflower broomrape (Orobanche cumana) with a wider host range due to changes in seed response to strigolactones

et al. 2019

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Genotyping‐by‐sequencing analysis of Orobanche crenata populations in Algeria reveals genetic differentiation

Bendaoud

Kim

Larose

et al. 2022

Ecology and Evolution

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Crenate broomrape (Orobanche crenata Forsk.) is a serious long‐standing parasitic weed problem in Algeria, mainly affecting legumes but also vegetable crops. Unresolved questions for parasitic weeds revolve around the extent to which these plants undergo local adaptation, especially with respect to host specialization, which would be expected to be a strong selective factor for obligate parasitic plants. In the present study, the genotyping‐by‐sequencing (GBS) approach was used to analyze genetic diversity and population structure of 10 Northern Algerian O. crenata populations with different geographical origins and host species (faba bean, pea, chickpea, carrot, and tomato). In total, 8004 high‐quality single‐nucleotide polymorphisms (5% missingness) were obtained and used across the study. Genetic diversity and relationships of 95 individuals from 10 populations were studied using model‐based ancestry analysis, principal components analysis, discriminant analysis of principal components, and phylogeny approaches. The genetic differentiation (FST) between pairs of populations was lower between adjacent populations and higher between geographically separated ones, but no support was found for isolation by distance. Further analyses identified four genetic clusters and revealed evidence of structuring among populations and, although confounded with location, among hosts. In the clearest example, O. crenata growing on pea had a SNP profile that was distinct from other host/location combinations. These results illustrate the importance and potential of GBS to reveal the dynamics of parasitic weed dispersal and population structure.

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