Transmission tests of ‘<i>Candidatus Liberibacter solanacearum</i>’ by carrot seeds

Loiseau, Marianne; Renaudin, I.; Cousseau-Suhard, Pascaline; Poliakoff, F.; Gentit, Pascal

doi:10.17660/actahortic.2017.1153.7

Cited by 13 publications

(9 citation statements)

References 15 publications

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“…12-24% of infected seedlings. Two other distinct experimental replications did not show any Lso seed transmission (Loiseau et al 2017a;2017b;Carminati et al, 2019), and further studies did not find evidence of Lso seed transmission in carrot (Haapalainen et al 2017, Oishi et al, 2017Mawassi et al, 2018;Fujikawa et al, 2020b;Nissinen et al, 2021). Based on these results, some seed import restrictions have been eased.…”

Section: Discussionmentioning

confidence: 88%

Response of carrot seed germination to heat treatment, the emergency measure to reduce the risk of ‘Candidatus Liberibacter solanacearum’ seed transmission

TIZZANI¹,

Gentili²,

Taglienti³

et al. 2023

Phytopathol. Mediterr.

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In Europe and the Mediterranean region, ‘Candidatus Liberibacter solanacearum’ (Lso) is associated with emerging diseases of Apiaceae crops, mainly carrot. Emergency measures for import of carrot seed were set, requiring seed to be heat-treated at 50°C or tested as Lso-negative by PCR. The germination response to heat treatment was assessed for 24 carrot cultivar and hybrid seed lots. Ten parsley, five fennel, and two celery seed lots were also analysed. Of these 41 seed lots, 21 were Lso-infected. Water heat treatment significantly decreased germinability compared to dry heat treatment, indicating that dry heat treatment is a cheaper and less detrimental procedure. However, the dry heat treatment significantly decreased seed germination compared to untreated controls in four of 24 seed lots of carrot, four of ten parsley seed lots, three of five fennel seed lots, and one of two celery seed lots. For parsley, the heat treatment reduced germinability to a lesser extent in Lso-infected than Lso-free seed lots. These data show that heat treatment can affect the germination of Apiaceae seeds to varying degrees, depending on species or variety, the type of heat treatment, and the sanitary status of the seeds.

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Section: Discussionmentioning

confidence: 88%

Response of carrot seed germination to heat treatment, the emergency measure to reduce the risk of ‘Candidatus Liberibacter solanacearum’ seed transmission

TIZZANI¹,

Gentili²,

Taglienti³

et al. 2023

Phytopathol. Mediterr.

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“…Liberibacter solanacearum', associated with several diseases on solanaceous and apiaceous crops through true seeds has been subject of several studies. Whereas Bertolini et al (2015) reported the transmission of the bacterium by seeds after cultivation of carrots under greenhouse conditions after five months with transmission rates up to 42%, Loiseau et al (2017a) did not find evidence of bacterial transmission by seeds. Moreover, additional studies also did not support the transmission of 'Ca.…”

Section: Introductionmentioning

confidence: 90%

Revisiting seed transmission of ‘Candidatus Liberibacter asiaticus’ in different citrus species and hybrids

Bagio

Canteri

Júnior

2020

Trop. plant pathol.

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Huanglongbing (HLB) caused by 'Candidatus Liberibacter spp.' is the most destructive disease for citrus production. These bacteria are disseminated naturally by insect vectors, such as the psyllid Diaphorina citri. However, the transmission of the bacteria vertically from seeds to seedlings has been controversial. Therefore, the objective of this study was to re-investigate the vertical transmission of the bacterium 'Ca. Liberibacter asiaticus' (CLas) from seeds to seedlings. Seeds of 'Rangpur' lime, 'Swingle' citrumelo, 'Ponkan' mandarin and the sweet oranges 'Folha Murcha', 'IAPAR-73', 'Pera Rio', 'Shamouti' and 'Valencia' were included in the study. Besides the seeds, 3493 citrus seedlings were also examined for the presence of the bacterium and for the development of HLB symptoms. The presence of the bacterium in different parts of the seeds and in citrus seedlings was examined by standard PCR. CLas was detected in all parts of the seeds, including seed coat or testa, tegmen, and endosperm plus embryos of all citrus cultivars, except for 'Shamouti' sweet orange. Although transient, the presence of the HLB bacterium was also detected in seedlings of 'Ponkan' mandarin and 'Folha Murcha' sweet orange obtained from seeds of HLBinfected trees up to 18 months after seedlings transplanting. However, no typical symptoms of HLB were observed in the citrus seedlings. Although CLas may infect the citrus seeds, the results of this study do not support the vertical transmission of viable cells of CLas from seeds to seedlings.

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“…Since the major vegetable seeds are distributed internationally every day and sown in the production areas worldwide, understandably, carrot seed producers, carrot farmers, seed companies, and plant quarantine agencies in various countries are concerned about potential economic damage. On the other hand, recent studies have also reported that Lso seed transmission is unlikely to occur in some circumstances [27][28][29]. Since it was unclear whether seed transmission occurs or not, our group also investigated the possibility of seed transmission of this disease.…”

Section: "Candidatus Liberibacter Solanacearum" In Carrot Seedsmentioning

confidence: 99%

Accumulation of Experimental Data for the Introduction of Smart Plant Protection Systems

Fujikawa¹

2022

Proceedings of the 2nd International Conference on Smart and Innovative Agriculture (ICoSIA 2021)

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Smart agriculture will be essential for sustainable food production. Above all, the implementation of smart plant protection is highly expected as a way to protect crops from pests. However, for this purpose, it is necessary to collect a lot of experimental data, link it with various information, and analyze them. This topic introduces three transboundary and high-risk diseases and shows how each experimental data relates to smart plant protection.

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Transmission tests of ‘Candidatus Liberibacter solanacearum’ by carrot seeds

Cited by 13 publications

References 15 publications

Response of carrot seed germination to heat treatment, the emergency measure to reduce the risk of ‘Candidatus Liberibacter solanacearum’ seed transmission

Response of carrot seed germination to heat treatment, the emergency measure to reduce the risk of ‘Candidatus Liberibacter solanacearum’ seed transmission

Revisiting seed transmission of ‘Candidatus Liberibacter asiaticus’ in different citrus species and hybrids

Accumulation of Experimental Data for the Introduction of Smart Plant Protection Systems

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