Acta Phytopathologica et Entomologica Hungarica
Volume/Issue:
Volume 49: Issue 2
Heat induced susceptibility of barley lines with various types of resistance genes to powdery mildew
Authors:
B. Barna Hungarian Academy of Sciences Plant Protection Institute, Centre for Agricultural Research P.O.B. 102 H-1525 Budapest Hungary

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B. Harrach Hungarian Academy of Sciences Plant Protection Institute, Centre for Agricultural Research P.O.B. 102 H-1525 Budapest Hungary

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O. Viczián Hungarian Academy of Sciences Plant Protection Institute, Centre for Agricultural Research P.O.B. 102 H-1525 Budapest Hungary

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J. Fodor Hungarian Academy of Sciences Plant Protection Institute, Centre for Agricultural Research P.O.B. 102 H-1525 Budapest Hungary

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Pages:
177–188
Online Publication Date:
04 Dec 2014
Publication Date:
01 Dec 2014
Article Category:
Journal Article
DOI:
https://doi.org/10.1556/APhyt.49.2014.2.4
Keywords:
Mla, Mlg and mlo genes; heat stress; microscopy; SOD, CAT and RNase enzymes; ion leakage
Restricted access

Heat shock treatment of near isogenic barley lines induced susceptibility against powdery mildew (Blumeria graminis f. sp. hordei, Bgh). When barley lines were immersed into hot water (48–49 °C) for 20 seconds one day before inoculation with Bgh race A6, the heat treatment increased susceptibility in susceptible barley cv. Ingrid and in its near-isogenic barley lines carrying different effective resistance genes. Microscopic investigations indicated vigorous development of the pathogen not only on heat treated susceptible Ingrid and resistant Mla, but also on Mlg-resistant and even mlo-resistant lines. However, when longer heat stress was used, infection density increased gradually on the susceptible Ingrid leaves, and the 40–50 sec heat treatment induced the development of visible powdery mildew colonies even on mlo leaves. Heat stress significantly increased leakage of ions from leaf segments from all barley lines with or without specific resistance genes and caused a late decrease of SOD and a slight increase in CAT enzyme activities, which correlated with the slightly down-regulated levels of hydrogen peroxide in the heat treated barley leaves. Significant increase of RNase activities was found after heat stress, and there was a slight degradation of total DNA as a consequence of heat pretreatment in all barley lines.

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Cover Acta Phytopathologica et Entomologica Hungarica
Acta Phytopathologica et Entomologica Hungarica
Print ISSN:
0238-1249
Online ISSN:
1588-2691

Editor-in-Chief

Jenő KONTSCHÁN Centre for Agricultural Research, Hungary

Technical Editor

Ágnes TURÓCI Centre for Agricultural Research, Hungary

Section Editor

K SALÁNKI Centre for Agricultural Research, Hungary
 

Editorial Board

Z BOZSÓ Centre for Agricultural Research, Hungary
PE CHETVERIKOV Saint-Petersburg State University, Russia
JX CUI Henan Institute of Science and Technology, China
J FODOR Centre for Agricultural Research, Hungary
Z IMREI Centre for Agricultural Research, Hungary
BM KAYDAN Çukurova University, Turkey
L KISS University of Southern Queensland, Australia
V MARKÓ Hungarian University of Agriculture and Life Sciences, Hungary
MW NEGM Ibaraki University, Japan
L PALKOVICS Széchenyi István University, Hungary
M POGÁNY Centre for Agricultural Research, Hungary
D RÉDEI National Chung Hsing University, Taiwan
A TOLSTIKOV University of Tyumen, Russia
J VUTS Rothamsted Research, UK
GQ WANG Guangxi University, China

Acta Phytopathologica et Entomologica Hungarica
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Phone: (36 1) 487 7534
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Acta Phytopathologica et Entomologica Hungarica
Language English
Size B5
Year of
Foundation		 1966
Volumes
per Year		 1
Issues
per Year		 2
Founder Magyar Tudományos Akadémia  
Founder's
Address		 H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher Akadémiai Kiadó
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0238-1249 (Print)
ISSN 1588-2691 (Online)

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