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Pathogenicity of Swedish isolates of Phytophthora quercina to Quercus robur in two different soils

Jönsson Belyazid, Ulrika LU ; Jung, T; Rosengren, Ulrika LU ; Nihlgård, Bengt LU and Sonesson, Kerstin LU (2003) In New Phytologist 158(2). p.355-364
Abstract
Several studies have demonstrated the involvement of soil-borne Phytophthora species, especially Phytophthora quercina , in European oak decline. However, knowledge about the pathogenicity of P. quercina in natural forest soils is limited. The short-term effects of two south-Swedish isolates of P. quercina on root vitality of Quercus robur seedlings grown in two different soils, one high pH, nutrient-rich peat-sand mixture and one acid, nitrogen-rich but otherwise nutrient-poor forest soil are described. Pathogenicity of P. quercina was tested using a soil infestation method under a restricted mesic water regime without prolonged flooding of the seedlings. There was a significant difference in dead fine-root length between control... (More)
Several studies have demonstrated the involvement of soil-borne Phytophthora species, especially Phytophthora quercina , in European oak decline. However, knowledge about the pathogenicity of P. quercina in natural forest soils is limited. The short-term effects of two south-Swedish isolates of P. quercina on root vitality of Quercus robur seedlings grown in two different soils, one high pH, nutrient-rich peat-sand mixture and one acid, nitrogen-rich but otherwise nutrient-poor forest soil are described. Pathogenicity of P. quercina was tested using a soil infestation method under a restricted mesic water regime without prolonged flooding of the seedlings. There was a significant difference in dead fine-root length between control seedlings and seedlings grown in soil infested with P. quercina . Trends were similar for both soil types and isolates, but there was a higher percentage of fine-root die-back and more severe damage on coarse roots in the acid forest soil. No effects on above-ground growth or leaf nutrient concentration between control seedlings and infected seedlings were found. The results confirm the pathogenicity of south-Swedish isolates of P. quercina in acid forest soils under restricted water availability. Stress-induced susceptibility of the seedlings and/or increased aggressiveness of the pathogen in the forest soil are discussed as key factors to explain the difference in root die-back between soil types. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
New Phytologist
volume
158
issue
2
pages
355 - 364
publisher
Wiley-Blackwell
external identifiers
  • wos:000182192300016
  • scopus:0038405131
ISSN
1469-8137
DOI
10.1046/j.1469-8137.2003.00734.x
language
English
LU publication?
yes
id
22991ac8-aa9f-48f7-a647-ca7e148fcbad (old id 137660)
date added to LUP
2007-07-02 11:24:26
date last changed
2018-10-03 11:00:53
@article{22991ac8-aa9f-48f7-a647-ca7e148fcbad,
  abstract     = {Several studies have demonstrated the involvement of soil-borne Phytophthora species, especially Phytophthora quercina , in European oak decline. However, knowledge about the pathogenicity of P. quercina in natural forest soils is limited. The short-term effects of two south-Swedish isolates of P. quercina on root vitality of Quercus robur seedlings grown in two different soils, one high pH, nutrient-rich peat-sand mixture and one acid, nitrogen-rich but otherwise nutrient-poor forest soil are described. Pathogenicity of P. quercina was tested using a soil infestation method under a restricted mesic water regime without prolonged flooding of the seedlings. There was a significant difference in dead fine-root length between control seedlings and seedlings grown in soil infested with P. quercina . Trends were similar for both soil types and isolates, but there was a higher percentage of fine-root die-back and more severe damage on coarse roots in the acid forest soil. No effects on above-ground growth or leaf nutrient concentration between control seedlings and infected seedlings were found. The results confirm the pathogenicity of south-Swedish isolates of P. quercina in acid forest soils under restricted water availability. Stress-induced susceptibility of the seedlings and/or increased aggressiveness of the pathogen in the forest soil are discussed as key factors to explain the difference in root die-back between soil types.},
  author       = {Jönsson Belyazid, Ulrika and Jung, T and Rosengren, Ulrika and Nihlgård, Bengt and Sonesson, Kerstin},
  issn         = {1469-8137},
  language     = {eng},
  number       = {2},
  pages        = {355--364},
  publisher    = {Wiley-Blackwell},
  series       = {New Phytologist},
  title        = {Pathogenicity of Swedish isolates of Phytophthora quercina to Quercus robur in two different soils},
  url          = {http://dx.doi.org/10.1046/j.1469-8137.2003.00734.x},
  volume       = {158},
  year         = {2003},
}