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Authors Wright

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Wright, Alice A.


Publications
3

CitationNamesAbstract
Physiological and Transcriptomic Analysis of ‘Candidatus Phytoplasma pruni’ Infection in Prunus persica Wright et al. (2023). PhytoFrontiers™ 3 (2) Ca. Phytoplasma pruni
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Recovery Plan for X-Disease in Stone Fruit Caused by ‘Candidatus Phytoplasma pruni’ Harper et al. (2023). Plant Health Progress 24 (2) Ca. Phytoplasma pruni
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Draft Genome Sequence of a Washington Isolate of “ Candidatus Phytoplasma pruni” Wright, Harper (2022). Microbiology Resource Announcements 11 (12) Ca. Phytoplasma pruni
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Physiological and Transcriptomic Analysis of ‘Candidatus Phytoplasma pruni’ Infection in Prunus persica
‘ Candidatus Phytoplasma pruni’ is the causative agent of X-disease on peach ( Prunus persica) trees. Infected trees exhibit premature yellowing, leaf necrosis causing a shot-hole appearance, limb dieback, and eventual death. How pathogen infection leads to these symptoms is unknown. This study undertook a modern characterization of the disease by assessing the physiological and transcriptomic consequences of phytoplasma infection. Phytoplasma titer was high in the symptomatic tissues and undetected or low in asymptomatic tissues. Symptomatic leaves had a significant decrease in chlorophyll a, chlorophyll b, and carotenoids. Transcriptomic analysis showed alterations in genes related to phytohormone synthesis and signaling, circadian rhythms, lignification, and sugar synthesis and transport. Several transcripts that might be related to symptom development were identified. Collectively, these data give a much clearer picture of symptom development in ‘ Ca. P. pruni’-infected P. persica and provide several avenues for further research in determining how ‘ Ca. P. pruni’ interacts with its host to elicit the observed symptoms. [Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .
Recovery Plan for X-Disease in Stone Fruit Caused by ‘Candidatus Phytoplasma pruni’
Stone fruits are a multibillion-dollar industry for the United States and Canada, one that has repeatedly suffered significant economic losses due to outbreaks of the X-disease phytoplasma (‘ Candidatus Phytoplasma pruni’) over the last century. Orchards and entire production areas have been abandoned, with corresponding losses to growers, fruit packers, and consumers. The most recent outbreak, in the U.S. Pacific Northwest, resulted in an estimated $65 million (USD) loss in revenue between 2015 and 2020 and is only increasing in incidence. Already present across much of the continental United States and Canada, the phytoplasma has a broad host range beyond stone fruit and is transmitted by at least eight leafhopper species, therefore stone fruit production in every state is at significant risk. This recovery plan was produced as part of the National Plant Disease Recovery System and is intended to provide a review of pathogen biology, assess the status of critical recovery components, and identify disease management research, extension, and education needs.
Draft Genome Sequence of a Washington Isolate of “ Candidatus Phytoplasma pruni”
Illumina sequencing of a Prunus avium tree with X-disease symptoms was performed to obtain a draft genome of “ Candidatus Phytoplasma pruni.” The genome consists of 14 contigs covering 588,767 bp. This is the first metagenome to be sequenced from the current X-disease epidemic in stone fruit in the Pacific Northwest.
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