PDD 96389 – Puccinia otagensis (Linds.) McKenzie & Padamsee
Data provider:
New Zealand Fungarium - Te Kohinga Hekaheka o Aotearoa
Barcode:
PDD 96389
Specimen type:
Packet
Loan status:
Active
Database record added:
27 July 2012
Database record updated:
24 February 2023
Components
Primary component
Active identification
Determined name:
Puccinia otagensis
Determiner:
J.A. Cooper
Identification date:
2018 (Verbatim: 2018)
Preferred name:
Puccinia otagensis (Linds.) McKenzie & Padamsee
Division:
Basidiomycota
Class:
Pucciniomycetes
Order:
Pucciniales
Family:
Pucciniaceae
Identification type:
Determination
Associations:
has host Rheum rhabarbarum
Substrate:
living leaves
Other identifications
Identification
Determined name:
Puccinia rhei-undulati
Determiner:
J.A. Cooper
Identification date:
2010-04-21 (Verbatim: 2010/04/21)
Preferred name:
Puccinia rhei-undulati Hirats. f.
Active:
no
Identification type:
Determination
Identification
Determined name:
Puccinia tiritea
Determiner:
J.A. Cooper
Identification date:
2017 (Verbatim: 2017)
Preferred name:
Puccinia otagensis (Linds.) McKenzie & Padamsee
Active:
no
Identification type:
Determination
Other components
Active identification
Determined name:
Rheum rhabarbarum
Determiner:
J.A. Cooper
Identification date:
2010-04-21 (Verbatim: 21/04/2010)
Preferred name:
Rheum rhabarbarum L.
Division:
Tracheophyta
Class:
Magnoliopsida
Order:
Caryophyllales
Family:
Polygonaceae
Identification type:
Determination
Present:
no
Collection events
Primary collection event
Verbatim collector:
Collectors reference no.:
JAC11300
Verbatim date:
Specimen notes
Public Note:
leaves going yellow and whole plant wilting. Strong green island effect. Uredinia only, with 3-5 equatorial pores (some just above, some just below). Weakly echinulate. length=23.3-30.6µm (µ=27.0, σ=2.4), width=17.9-21.4µm (µ=19.3, σ=1.2), Q=1.2-1.6µm (µ=1.4, σ=0.1), n=6. In UK P. phragmitis is only known by innculation and then only 0,I. P. r-u was described in 1935 from Tokyo botanic garden on Rheum undulatum and later on rhubarb. Cunningham first recorded it for NZ in 1945 and it's identity has not been questioned since. Rhubarb is native to Asia. Most google content, now 80 years after those first records, refers to this rust in Australia and New Zealand. Is it really the Japanese rust? And/or is the Japanese rust distinct? Other possibilities perhaps are Uromyces acetosae (uerdinia a bit small for this), Uromyce rumicis (spot on - even with green island effect, but then why rust not recorded other than NZ and Au?), P. kirkii (good match, but this endemic rust on endemic host (maybe!) so how in Au?), P. tiritea (on Muehlenbeckia, but perhaps spines too coarse). It does not seem logical for there to be a rhubarb specific rust commonly encountered in just Australia and New Zealand. Far more likely the natural host is one of our indigenous polygonaceae and that it also infects Rhubarb locally (and I think its P. tiritea).
J.A. Cooper, 2010
J.A. Cooper, 2010
Assigned reference numbers
JA Cooper Fungarium:
JAC11300
Permissions
Project permits
Biocultural (BC) Notice
