دورية أكاديمية

Comparative Analysis of Host-Associated Variation in Phytophthora cactorum

التفاصيل البيبلوغرافية
العنوان: Comparative Analysis of Host-Associated Variation in Phytophthora cactorum
المؤلفون: Charlotte F. Nellist, Andrew D. Armitage, Helen J. Bates, Maria K. Sobczyk, Matteo Luberti, Laura A. Lewis, Richard J. Harrison
المصدر: Frontiers in Microbiology, Vol 12 (2021)
بيانات النشر: Frontiers Media S.A., 2021.
سنة النشر: 2021
المجموعة: LCC:Microbiology
مصطلحات موضوعية: crown rot, oomycete, phylogenomics, effectors, cryptic species, Microbiology, QR1-502
الوصف: Phytophthora cactorum is often described as a generalist pathogen, with isolates causing disease in a range of plant species. It is the causative agent of two diseases in the cultivated strawberry, crown rot (CR; causing whole plant collapse) and leather rot (LR; affecting the fruit). In the cultivated apple, P. cactorum causes girdling bark rots on the scion (collar rot) and rootstock (crown rot), as well as necrosis of the fine root system (root rot) and fruit rots. We investigated evidence for host specialisation within P. cactorum through comparative genomic analysis of 18 isolates. Whole genome phylogenetic analysis provided genomic support for discrete lineages within P. cactorum, with well-supported non-recombining clades for strawberry CR and apple infecting isolates specialised to strawberry crowns and apple tissue. Isolates of strawberry CR are genetically similar globally, while there is more diversity in apple-infecting isolates. We sought to identify the genetic basis of host specialisation, demonstrating gain and loss of effector complements within the P. cactorum phylogeny, representing putative determinants of host boundaries. Transcriptomic analysis highlighted that those effectors found to be specific to a single host or expanded in the strawberry lineage are amongst those most highly expressed during infection of strawberry and give a wider insight into the key effectors active during strawberry infection. Many effectors that had homologues in other Phytophthoras that have been characterised as avirulence genes were present but not expressed in our tested isolate. Our results highlight several RxLR-containing effectors that warrant further investigation to determine whether they are indeed virulence factors and host-specificity determinants for strawberry and apple. Furthermore, additional work is required to determine whether these effectors are suitable targets to focus attention on for future resistance breeding efforts.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1664-302X
Relation: https://www.frontiersin.org/articles/10.3389/fmicb.2021.679936/full; https://doaj.org/toc/1664-302X
DOI: 10.3389/fmicb.2021.679936
URL الوصول: https://doaj.org/article/565cf653a91340efbb1b21fe5033c090
رقم الأكسشن: edsdoj.565cf653a91340efbb1b21fe5033c090
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:1664302X
DOI:10.3389/fmicb.2021.679936