Topic
Phytophthora ramorum
About: Phytophthora ramorum is a research topic. Over the lifetime, 727 publications have been published within this topic receiving 16886 citations. The topic is also known as: Sudden Oak Death.
Papers published on a yearly basis
Papers
Virginia Tech1, Joint Genome Institute2, Lawrence Berkeley National Laboratory3, Wageningen University and Research Centre4, University of Warwick5, Imperial College London6, University of California, Berkeley7, Cornell University8, Ohio Agricultural Research and Development Center9, Agriculture and Agri-Food Canada10, Agricultural Research Service11, Lawrence Livermore National Laboratory12, North Carolina State University13, University of Tennessee14, Oak Ridge National Laboratory15, University of California, Merced16, University of Queensland17, Wilkes University18, Bowling Green State University19, Hokkaido University20
TL;DR: Comparison of the two species' genomes reveals a rapid expansion and diversification of many protein families associated with plant infection such as hydrolases, ABC transporters, protein toxins, proteinase inhibitors, and, in particular, a superfamily of 700 proteins with similarity to known oömycete avirulence genes.
Abstract: Draft genome sequences have been determined for the soybean pathogen Phytophthora sojae and the sudden oak death pathogen Phytophthora ramorum. Oomycetes such as these Phytophthora species share the kingdom Stramenopila with photosynthetic algae such as diatoms, and the presence of many Phytophthora genes of probable phototroph origin supports a photosynthetic ancestry for the stramenopiles. Comparison of the two species' genomes reveals a rapid expansion and diversification of many protein families associated with plant infection such as hydrolases, ABC transporters, protein toxins, proteinase inhibitors, and, in particular, a superfamily of 700 proteins with similarity to known oomycete avirulence genes.
1,111 citations
Norwich Research Park1, University of California, Riverside2, University of Florida3, West Bengal State University4, Mediterranea University of Reggio Calabria5, Agro ParisTech6, University of Nice Sophia Antipolis7, Deakin University8, National Research Council9, College of Horticulture10, University of Massachusetts Amherst11, James Hutton Institute12, University of Tennessee13, Agriculture and Agri-Food Canada14, Oregon State University15, Agricultural Research Service16, University of Alabama at Birmingham17, University of Warwick18, University of Worcester19, Utrecht University20, Virginia Tech21, University of Manitoba22, Cornell University23, International Potato Center24, Wageningen University and Research Centre25, Institut national de la recherche agronomique26, North Carolina State University27
TL;DR: A survey to query the community for their ranking of plant-pathogenic oomycete species based on scientific and economic importance received 263 votes from 62 scientists in 15 countries for a total of 33 species and the Top 10 species are provided.
Abstract: Oomycetes form a deep lineage of eukaryotic organisms that includes a large number of plant pathogens which threaten natural and managed ecosystems. We undertook a survey to query the community for their ranking of plant-pathogenic oomycete species based on scientific and economic importance. In total, we received 263 votes from 62 scientists in 15 countries for a total of 33 species. The Top 10 species and their ranking are: (1) Phytophthora infestans; (2, tied) Hyaloperonospora arabidopsidis; (2, tied) Phytophthora ramorum; (4) Phytophthora sojae; (5) Phytophthora capsici; (6) Plasmopara viticola; (7) Phytophthora cinnamomi; (8, tied) Phytophthora parasitica; (8, tied) Pythium ultimum; and (10) Albugo candida. This article provides an introduction to these 10 taxa and a snapshot of current research. We hope that the list will serve as a benchmark for future trends in oomycete research.
834 citations
TL;DR: A new canker disease, commonly known as sudden oak death, of Lithocarpus densiflorus, Quercus agrifolia, Q. kelloggii, and Q. shrevei in California is shown to be caused by Phytophthora ramorum, a recently described species that was known only from Germany and the Netherlands on Rhododendron spp.
Abstract: A new canker disease, commonly known as sudden oak death, of Lithocarpus densiflorus, Quercus agrifolia, Q. kelloggii, and Q. parvula var. shrevei in California is shown to be caused by Phytophthora ramorum. The pathogen is a recently described species that previously was known only from Germany and the Netherlands on Rhododendron spp. and a Viburnum sp. This disease has reached epidemic proportions in forests along approximately 300 km of the central coast of California. The most consistent and diagnostic symptoms on trees are cankers that develop before foliage symptoms become evident. Cankers have brown or black discolored outer bark and seep dark red sap. Cankers occur on the trunk at the root crown up to 20 m above the ground, but do not enlarge below the soil line into the roots. Individual cankers are delimited by thin black lines in the inner bark and can be over 2 m in length. In L. densiflorus saplings, P. ramorum was isolated from branches as small as 5 mm in diameter. L. densiflorus and Q. agrifolia were inoculated with P. ramorum in the field and greenhouse, and symptoms similar to those of naturally infected trees developed. The pathogen was reisolated from the inoculated plants, which confirmed pathogenicity.
704 citations
TL;DR: It was concluded that a new Phytophthora species, described here as P. ramorum sp.
575 citations
TL;DR: The high susceptibility of tanoak to infection and death suggests that P ramorum is an exotic pathogen, but its origins, and most details of its biology and ecology, remain unknown.
Abstract: Sudden oak death is a new disease affecting tanoak (Lithocarpus densiflora) and oaks (Quercus spp) in California and Oregon, caused by the recently described pathogen Phytophthora ramorum. It has reached epidemic proportions in several counties in central California, leading to the death of tens of thousands of trees. In addition to oaks and tanoak, P ramorum has been found in nearly all woody plant species in mixed evergreen and redwood forests from central California to southern Oregon. Plant species that are not killed appear to serve as a reservoir for the pathogen. The high susceptibility of tanoak to infection and death suggests that P ramorum is an exotic pathogen, but its origins, and most details of its biology and ecology, remain unknown. Our limited knowledge only compounds our concern over the long-term implications of this epidemic for the ecology of coastal forests.
534 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 8 |
| 2024 | 6 |
| 2023 | 15 |
| 2022 | 24 |
| 2021 | 16 |
| 2020 | 23 |