Possible Overestimation of Seed Transmission in the Spread of Pospiviroids in Commercial Pepper and Tomato Crops Based on Large-Scale Grow-Out Trials and Systematic Literature Review

Verhoeven, J. Th. J.; Botermans, Marleen; Schoen, R.; Koenraadt, H.; Roenhorst, J. W.

doi:10.3390/plants10081707

Cited by 11 publications

(5 citation statements)

References 73 publications

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“…Moreover, Verhoeven et al . (2021) stated that the risk of seed transmission of pospiviroids is low in commercial pepper and tomato crops. Even for these plants, however, prolonged post‐infection cultivation periods might increase the risk of seed transmission.…”

Section: Resultsmentioning

confidence: 99%

Effect of potato spindle tuber viroid variants and infection stage on seed transmission through pollen

Yanagisawa

Matsushita

2022

Letters in Applied Microbiology

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Viroids are small, proteinless single‐stranded circular RNAs. In plants, they can be transmitted via infected pollen and seeds. The effectiveness of viroid transmission through pollen depends on both the viroid and host species. It is, however, unclear whether viroid variant type or infection stage influences seed transmission through pollen. In the present study, we collected pollen from petunia infected with nine different variants of the potato spindle tuber viroid (PSTVd) at various stages after inoculation and used the material to pollinate healthy plants. Five and eight PSTVd variants were transmitted by pollen at 3 and 6 mpi respectively. All variants were pollen‐transmissible at 9 mpi. The foregoing results indicated that seed transmission of PSTVd through pollen collected from infected donor plants may depend on the time elapsed since inoculation. For variant no. EU862231, however, the rate of seed transmission via pollen may depend on the pollen viroid titre. Nevertheless, there was no apparent correlation between the transmission rate and the pollen viroid titre in the U23058 or V01465 variant. Hence, the relationship between the viroid transmission rate and the pollen viroid titre may depend on the viroid variant type.

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Section: Resultsmentioning

confidence: 99%

Effect of potato spindle tuber viroid variants and infection stage on seed transmission through pollen

Yanagisawa

Matsushita

2022

Letters in Applied Microbiology

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“…In addition, PSTVd can be spread by vegetative propagation and transmission via seeds (Matsushita and Tsuda, 2016). However, lack of seed transmission has also been reported (Faggioli et al, 2017, Verhoeven et al, 2020 and a recent report (Verhoeven et al, 2021) suggests that the role of seed transmission in the spread of pospiviroids (including PSTVd) in pepper and tomato may have been overestimated. Horizontal transmission through infected pollen has been documented for PSTVd (Kryczyński et al, 1988;Singh et al, 1992;Yanagisawa and Matsushita 2018).…”

Section: Bemisia-transmitted Virusesmentioning

confidence: 99%

Commodity risk assessment of Petunia spp. and Calibrachoa spp. unrooted cuttings from Kenya

Bragard,

Baptista,

Chatzivassiliou

et al. 2024

EFS2

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The European Commission requested the EFSA Panel on Plant Health to evaluate the probability of entry of pests (likelihood of pest freedom at entry), including both regulated and non-regulated pests, associated with unrooted cuttings of the genera Petunia and Calibrachoa produced under physical isolation in Kenya. The relevance of any pest for this opinion was based on evidence following defined criteria, based on the methodology used for High-Risk Plants adapted for the specificity of this assessment. Fourteen EU-regulated pests (Bemisia tabaci, cowpea mild mottle virus, Liriomyza huidobrensis, Liriomyza sativae, Liriomyza trifolii, potato leafroll virus, potato spindle tuber viroid, Ralstonia pseudosolanacearum, R. solanacearum, Scirtothrips dorsalis, tomato mild mottle virus, tomato spotted wilt virus, tomato yellow leaf curl virus and Xanthomonas vesicatoria) and six EU nonregulated pests (Aleurodicus dispersus, pepper veinal mottle virus, Nipaecoccus viridis, Phenacoccus solenopsis, Tetranychus neocaledonicus and tomato yellow ring virus) fulfilled all relevant criteria and were selected for further evaluation. For these pests, the risk mitigation measures proposed in the technical dossier from Kenya were evaluated, taking into account the possible limiting factors. Additionally, an expert judgement is given on the likelihood of pest freedom, taking into consideration the risk mitigation measures acting on the pest, including uncertainties associated with the assessment. The estimated degree of pest freedom varies among the pests evaluated, with T. neocaledonicus being the pest most frequently expected on the imported cuttings. The Expert Knowledge Elicitation indicated, with 95% certainty, that between 9942 and 10,000 bags containing unrooted cuttings of Petunia spp. and Calibrachoa spp. per 10,000 would be free of T. neocaledonicus.

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“…Questions remain over the relative risk to food crops from asymptomatic pospiviroid infections of ornamentals, compared to other potential sources such as commodity seeds of tomato and pepper (24,25,39,112), and there are conflicting reports of the relative importance of ornamentals in outbreaks in commercial tomato and pepper crops (142,144).…”

Section: Pospiviroids: Benign Infections Of Solanaceous Ornamentals O...mentioning

confidence: 99%

International Trade and Local Effects of Viral and Bacterial Diseases in Ornamental Plants

Huang

Jordan

Meekes³

et al. 2023

Annu. Rev. Phytopathol.

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Since the 1950s, there have been major changes in the scope, value, and organization of the ornamental plant industry. With fewer individual producers and a strong trend toward consolidation and globalization, increasing quantities of diverse plant genera and species are being shipped internationally. Many more ornamentals are propagated vegetatively instead of by seed, further contributing to disease spread. These factors have led to global movement of pathogens to countries where they were not formerly known. The emergence of some previously undescribed pathogens has been facilitated by high-throughput sequencing, but biological studies are often lacking, so their roles in economic diseases are not yet known. Case studies of diseases in selected ornamentals discuss the factors involved in their spread, control measures to reduce their economic impact, and show some potential effects on agronomic crops. Advances in diagnostic techniques are discussed, and parallels are drawn to the international movement of human diseases. Expected final online publication date for the Annual Review of Phytopathology, Volume 61 is September 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

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Possible Overestimation of Seed Transmission in the Spread of Pospiviroids in Commercial Pepper and Tomato Crops Based on Large-Scale Grow-Out Trials and Systematic Literature Review

Cited by 11 publications

References 73 publications

Effect of potato spindle tuber viroid variants and infection stage on seed transmission through pollen

Effect of potato spindle tuber viroid variants and infection stage on seed transmission through pollen

Commodity risk assessment of Petunia spp. and Calibrachoa spp. unrooted cuttings from Kenya

International Trade and Local Effects of Viral and Bacterial Diseases in Ornamental Plants

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