Pucciniastrum minimum is the causal agent of blueberry leaf rust on different Vaccinium species in Hawke’s Bay, New Zealand

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dc.citation.issue2
dc.citation.volume52
dc.contributor.authorChen X
dc.contributor.authorMesarich CH
dc.contributor.authorKerckhoffs H
dc.contributor.authorHutchins D
dc.contributor.authorSofkova-Bobcheva S
dc.date.accessioned2024-10-09T00:52:49Z
dc.date.available2024-10-09T00:52:49Z
dc.date.issued2023-03-01
dc.description.abstractBlueberry leaf rust has become a prevalent disease in New Zealand blueberry production. To identify the pathogen responsible for this disease in the Hawke’s Bay region of New Zealand, leaves showing signs or symptoms of rust infection were collected from three blueberry cultivars (‘Centra Blue’ [Rabbiteye], ‘Georgia Dawn’ [Southern Highbush] and ‘Nui’ [Northern Highbush]) and the pathogen subjected to morphological characterization using both scanning electron and bright-field microscopy. Meanwhile, genomic DNA was extracted from urediniospores of infected leaves collected from cultivar ‘Rahi’ (Rabbiteye) and the Internal Transcribed Spacer (ITS) region was sequenced and compared to the corresponding nucleotide sequence of known rust pathogens. Results from both experiments indicated that Pucciniastrum minimum (syn. Thekopsora minima) was the causal agent of blueberry leaf rust disease in Hawke’s Bay. Next, the level of disease caused by P. minimum was quantified on 23 blueberry cultivars in this region during the 2019 blueberry production season. Here, a total of 20 leaves selected from each cultivar were continually monitored, and the lesion area was calculated using ImageJ based on images taken in the field. Based on this analysis, all leaves were found to be infected by the rust pathogen. However, disease intensity, as a function of the ‘area under the disease progress curve’ (AUDPC) value, was found to be different. This suggests that certain cultivars display a lower disease intensity during the harvest season. Further field assessment covering a whole growing cycle will give a better understanding about blueberry leaf rust infection on these cultivars.
dc.description.confidentialfalse
dc.edition.editionMarch 2023
dc.format.pagination155-162
dc.identifier.citationChen X, Mesarich CH, Kerckhoffs H, Hutchins D, Sofkova-Bobcheva S. (2023). Pucciniastrum minimum is the causal agent of blueberry leaf rust on different Vaccinium species in Hawke’s Bay, New Zealand. Australasian Plant Pathology. 52. 2. (pp. 155-162).
dc.identifier.doi10.1007/s13313-023-00907-x
dc.identifier.eissn1448-6032
dc.identifier.elements-typejournal-article
dc.identifier.issn0815-3191
dc.identifier.piis13313-023-00907-x
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71647
dc.languageEnglish
dc.publisherSpringer Nature on behalf of the Australasian Plant Pathology Society Inc
dc.publisher.urihttps://link.springer.com/article/10.1007/s13313-023-00907-x
dc.relation.isPartOfAustralasian Plant Pathology
dc.rights(c) 2023 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectPucciniastrum minimum (syn. Thekopsora minima)
dc.subjectBlueberry leaf rust
dc.subjectVaccinium spp
dc.subjectBlueberry
dc.subjectInternal transcribed spacer (ITS) region
dc.subjectArea under the disease progress curve (AUDPC)
dc.subjectImageJ
dc.titlePucciniastrum minimum is the causal agent of blueberry leaf rust on different Vaccinium species in Hawke’s Bay, New Zealand
dc.typeJournal article
pubs.elements-id459949
pubs.organisational-groupOther
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