Molecular characterization of Phytophthora porri and closely related species and their pathogenicity on leek (Allium porrum)

Declercq, Bart; Buyten, Evelien Van; Claeys, Sofie; Cap, Nathalie; Nies, Joris De; Pollet, Sabien; Höfte, Monica

doi:10.1007/s10658-010-9601-5

Cited by 11 publications

(14 citation statements)

References 24 publications

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“…The occurrence of natural hybrids between Phytophthora nicotianae and Phytophthora cactorum has been reported in different countries (Man In't Veld et al , 1998; Hurtado‐Gonzales et al , 2009). Hybrids between Phytophthora porri and Phytophthora primulae have also been reported (Declercq et al , 2010). Whether these hybrids have an extended host range has not been tested as yet.…”

Section: Interspecies Hybridization Leading To the Broadening Of Hostmentioning

confidence: 99%

Horizontal gene and chromosome transfer in plant pathogenic fungi affecting host range

Mehrabi¹,

Bahkali²,

Abd-Elsalam³

et al. 2011

FEMS Microbiol Rev

164

119

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Plant pathogenic fungi adapt quickly to changing environments including overcoming plant disease resistance genes. This is usually achieved by mutations in single effector genes of the pathogens, enabling them to avoid recognition by the host plant. In addition, horizontal gene transfer (HGT) and horizontal chromosome transfer (HCT) provide a means for pathogens to broaden their host range. Recently, several reports have appeared in the literature on HGT, HCT and hybridization between plant pathogenic fungi that affect their host range, including species of Stagonospora/Pyrenophora, Fusarium and Alternaria. Evidence is given that HGT of the ToxA gene from Stagonospora nodorum to Pyrenophora tritici-repentis enabled the latter fungus to cause a serious disease in wheat. A nonpathogenic Fusarium species can become pathogenic on tomato by HCT of a pathogenicity chromosome from Fusarium oxysporum f.sp lycopersici, a well-known pathogen of tomato. Similarly, Alternaria species can broaden their host range by HCT of a single chromosome carrying a cluster of genes encoding host-specific toxins that enabled them to become pathogenic on new hosts such as apple, Japanese pear, strawberry and tomato, respectively. The mechanisms HGT and HCT and their impact on potential emergence of fungal plant pathogens adapted to new host plants will be discussed.

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Section: Interspecies Hybridization Leading To the Broadening Of Hostmentioning

confidence: 99%

Horizontal gene and chromosome transfer in plant pathogenic fungi affecting host range

Mehrabi¹,

Bahkali²,

Abd-Elsalam³

et al. 2011

FEMS Microbiol Rev

164

119

View full text Add to dashboard Cite

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“…In all experiments in controlled conditions, P. porri isolate K06006 (2) isolated from a diseased leek plant in East‐Flanders, Belgium (Declercq et al. 2010), was used.…”

Section: Methodsmentioning

confidence: 99%

“…In all experiments in controlled conditions, P. porri isolate K06006 (2) isolated from a diseased leek plant in East-Flanders, Belgium (Declercq et al 2010), was used. Oospores were produced as described by Smilde et al (1996b) with minor modifications.…”

Section: Oospore Productionmentioning

confidence: 99%

“…2008). We recently showed that P. porri isolates from leek form a homogenous group with very little genetic diversity, which can be distinguished from P. porri isolates from other Allium species and carrot (Declercq et al. 2010).…”

Section: Introductionmentioning

confidence: 99%

“…White tip, caused by Phytophthora porri Foister (Foister 1931;Erwin and Ribeiro 1996), is a devastating disease in the autumn and winter production of leek (Allium porrum) in Europe. Phytophthora porri is a soilborne homothallic oomycete which is grouped, together with closely related species such as P. brassicae, P. primulae and P. syringae, in Phytophthora clade 8b (Cooke et al 2000;Blair et al 2008).We recently showed that P. porri isolates from leek form a homogenous group with very little genetic diversity, which can be distinguished from P. porri isolates from other Allium species and carrot (Declercq et al 2010). Despite being soilborne, P. porri can only attack the above-ground parts of the leek plant, where it causes white papery lesions on leaves and leaf tips.…”

Section: Introductionmentioning

confidence: 99%

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New Insights in the Life Cycle and Epidemics of Phytophthora porri on Leek

Declercq

Devlamynck

Vleesschauwer

et al. 2011

Journal of Phytopathology

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White tip, caused by Phytophthora porri, is a devastating disease in the autumn and winter production of leek (Allium porrum) in Europe. This study investigated the disease cycle of P. porri in laboratory and field conditions. Oospores readily germinated in the presence of non-sterile soil extract at any temperature between 4 and 22°C, with the formation of sporangia which released zoospores. The zoospores survived at least 7 weeks in water at a temperature range of 0 till 24°C. Microscopic examinations revealed that zoospores encysted and germinated on the leek leaf surface and hyphae entered the leaf directly through stomata or by penetrating via appressoria. Oospores were formed in the leaves within 6 days, while sporangia were not produced. By monitoring disease progress in fields with a different cropping history of leek, it could be deduced that P. porri survives in soil for up to 4 years. Disease progress during three consecutive years was correlated with average daily rainfall in the infection period. Disease incidence on leek was reduced when rain splash was excluded by growing the plants in an open hoop greenhouse. Based on these findings, we propose a disease cycle for P. porri in which oospores germinate in puddles, and zoospores reach the leaves by rain splash and survive in water in the leaf axils, from where they infect the plant by direct penetration or via stomata. When conditions become unfavourable, oospores are produced in the leaves which again reach the soil when leaves decay. Secondary spread of the disease by sporangia does not seem to be important.

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Detection of leek white tip disease under field conditions using hyperspectral proximal sensing and supervised machine learning

Appeltans

Pieters

Mouazen

2021

Computers and Electronics in Agriculture

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Molecular characterization of Phytophthora porri and closely related species and their pathogenicity on leek (Allium porrum)

Cited by 11 publications

References 24 publications

Horizontal gene and chromosome transfer in plant pathogenic fungi affecting host range

Horizontal gene and chromosome transfer in plant pathogenic fungi affecting host range

New Insights in the Life Cycle and Epidemics of Phytophthora porri on Leek

Detection of leek white tip disease under field conditions using hyperspectral proximal sensing and supervised machine learning

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