@ARTICLE{TreeBASE2Ref28865,
author = {Duy Phu Le and Aphrika Gregson},
title = {Alternaria leaf spot of cotton seedlings grown in New South Wales, Australia is predominantly associated with Alternaria alternata.},
year = {2018},
keywords = {Gossypium hirsutum, minor disease, susceptibility, pathogenicity, phylogenetic},
doi = {},
url = {http://},
pmid = {},
journal = {Australasian Plant Pathology},
volume = {},
number = {},
pages = {},
abstract = {Alternaria leaf spot (ALS) of cotton, especially on cotyledons is generally considered a minor disease in Australia. However, severe disease outbreaks were recorded in multiple cotton crops in Southern New South Wales (NSW) in the 2017/18 season. Due to ALS being considered a minor disease, causal species have not been formally characterised in Australia. In this study, putative small-spored Alternaria alternata was predominantly recovered from diseased cotyledons sampled from ALS hot spot fields in Southern NSW as well as other locations across NSW. Species status of recovered isolates as A. alternata was confirmed through of morphology and sequence analyses of the internal transcribed spacer (ITS) and translation elongation factor 1-alpha (TEF1) regions. Phylogenetic analyses of the two regions both individually or in combination resulted in a well-supported group of 69 isolates (83%) clustering with the ex-type specimen of A. alternata CBS 916.96, thus confirming the preliminary morphological identifications. In artificially inoculated assays on 15-day-old cotton seedlings a subset of selected A. alternata isolates produced similar ALS symptoms at seven days after inoculation (DAI) as seen in the field. Koch?s postulate was fulfilled by re-isolating A. alternata from infected ALS cotyledons at 21 DAI. This is the first main stream published report of A. alternata causing ALS on cotton cotyledons in NSW, Australia.}
}
Citation for Study 23344
Citation title:
"Alternaria leaf spot of cotton seedlings grown in New South Wales, Australia is predominantly associated with Alternaria alternata.".
Study name:
"Alternaria leaf spot of cotton seedlings grown in New South Wales, Australia is predominantly associated with Alternaria alternata.".
This study is part of submission 23344
(Status: Published).
Citation
Le D.P., & Gregson A. 2018. Alternaria leaf spot of cotton seedlings grown in New South Wales, Australia is predominantly associated with Alternaria alternata. Australasian Plant Pathology, .
Authors
-
Le D.P.
(submitter)
+61450647876
-
Gregson A.
Abstract
Alternaria leaf spot (ALS) of cotton, especially on cotyledons is generally considered a minor disease in Australia. However, severe disease outbreaks were recorded in multiple cotton crops in Southern New South Wales (NSW) in the 2017/18 season. Due to ALS being considered a minor disease, causal species have not been formally characterised in Australia. In this study, putative small-spored Alternaria alternata was predominantly recovered from diseased cotyledons sampled from ALS hot spot fields in Southern NSW as well as other locations across NSW. Species status of recovered isolates as A. alternata was confirmed through of morphology and sequence analyses of the internal transcribed spacer (ITS) and translation elongation factor 1-alpha (TEF1) regions. Phylogenetic analyses of the two regions both individually or in combination resulted in a well-supported group of 69 isolates (83%) clustering with the ex-type specimen of A. alternata CBS 916.96, thus confirming the preliminary morphological identifications. In artificially inoculated assays on 15-day-old cotton seedlings a subset of selected A. alternata isolates produced similar ALS symptoms at seven days after inoculation (DAI) as seen in the field. Koch?s postulate was fulfilled by re-isolating A. alternata from infected ALS cotyledons at 21 DAI. This is the first main stream published report of A. alternata causing ALS on cotton cotyledons in NSW, Australia.
Keywords
Gossypium hirsutum, minor disease, susceptibility, pathogenicity, phylogenetic
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S23344
- Other versions:
Nexus
NeXML
- Show BibTeX reference
@ARTICLE{TreeBASE2Ref28865,
author = {Duy Phu Le and Aphrika Gregson},
title = {Alternaria leaf spot of cotton seedlings grown in New South Wales, Australia is predominantly associated with Alternaria alternata.},
year = {2018},
keywords = {Gossypium hirsutum, minor disease, susceptibility, pathogenicity, phylogenetic},
doi = {},
url = {http://},
pmid = {},
journal = {Australasian Plant Pathology},
volume = {},
number = {},
pages = {},
abstract = {Alternaria leaf spot (ALS) of cotton, especially on cotyledons is generally considered a minor disease in Australia. However, severe disease outbreaks were recorded in multiple cotton crops in Southern New South Wales (NSW) in the 2017/18 season. Due to ALS being considered a minor disease, causal species have not been formally characterised in Australia. In this study, putative small-spored Alternaria alternata was predominantly recovered from diseased cotyledons sampled from ALS hot spot fields in Southern NSW as well as other locations across NSW. Species status of recovered isolates as A. alternata was confirmed through of morphology and sequence analyses of the internal transcribed spacer (ITS) and translation elongation factor 1-alpha (TEF1) regions. Phylogenetic analyses of the two regions both individually or in combination resulted in a well-supported group of 69 isolates (83%) clustering with the ex-type specimen of A. alternata CBS 916.96, thus confirming the preliminary morphological identifications. In artificially inoculated assays on 15-day-old cotton seedlings a subset of selected A. alternata isolates produced similar ALS symptoms at seven days after inoculation (DAI) as seen in the field. Koch?s postulate was fulfilled by re-isolating A. alternata from infected ALS cotyledons at 21 DAI. This is the first main stream published report of A. alternata causing ALS on cotton cotyledons in NSW, Australia.}
}
- Show RIS reference
TY - JOUR
ID - 28865
AU - Le,Duy Phu
AU - Gregson,Aphrika
T1 - Alternaria leaf spot of cotton seedlings grown in New South Wales, Australia is predominantly associated with Alternaria alternata.
PY - 2018
KW - Gossypium hirsutum
KW - minor disease
KW - susceptibility
KW - pathogenicity
KW - phylogenetic
UR - http://dx.doi.org/
N2 - Alternaria leaf spot (ALS) of cotton, especially on cotyledons is generally considered a minor disease in Australia. However, severe disease outbreaks were recorded in multiple cotton crops in Southern New South Wales (NSW) in the 2017/18 season. Due to ALS being considered a minor disease, causal species have not been formally characterised in Australia. In this study, putative small-spored Alternaria alternata was predominantly recovered from diseased cotyledons sampled from ALS hot spot fields in Southern NSW as well as other locations across NSW. Species status of recovered isolates as A. alternata was confirmed through of morphology and sequence analyses of the internal transcribed spacer (ITS) and translation elongation factor 1-alpha (TEF1) regions. Phylogenetic analyses of the two regions both individually or in combination resulted in a well-supported group of 69 isolates (83%) clustering with the ex-type specimen of A. alternata CBS 916.96, thus confirming the preliminary morphological identifications. In artificially inoculated assays on 15-day-old cotton seedlings a subset of selected A. alternata isolates produced similar ALS symptoms at seven days after inoculation (DAI) as seen in the field. Koch?s postulate was fulfilled by re-isolating A. alternata from infected ALS cotyledons at 21 DAI. This is the first main stream published report of A. alternata causing ALS on cotton cotyledons in NSW, Australia.
L3 -
JF - Australasian Plant Pathology
VL -
IS -
ER -
Go to search
Citation
Taxa
Matrices
Trees
Analyses
