Infection frequency of mature apple fruit with Erwinia amylovora deposited on pedicels and its survival in the fruit stored at low temperature

2005 ◽  
Vol 71 (4) ◽  
pp. 296-301 ◽  
Author(s):  
Takanori Tsukamoto ◽  
Koji Azegami ◽  
Takayuki Matsuura ◽  
Tatsuji Ohara ◽  
Yasuhiro Inoue ◽  
...  
Keyword(s):  
Low Temperature ◽  
Erwinia Amylovora ◽  
Apple Fruit ◽  
Infection Frequency ◽  
Mature Apple

Invasion and colonization of mature apple fruit by Erwinia amylovora tagged with bioluminescence genes

2004 ◽  
Vol 70 (6) ◽  
pp. 336-341 ◽  
Author(s):  
Koji Azegami ◽  
Takanori Tsukamoto ◽  
Takayuki Matsuura ◽  
Tatsuji Ohara ◽  
Yasuhiro Inoue ◽  
...  
Keyword(s):  
Erwinia Amylovora ◽  
Apple Fruit ◽  
Mature Apple

SURVIVAL OF ERWINIA AMYLOVORA IN ASSOCIATION WITH MATURE APPLE FRUIT

1974 ◽  
Vol 54 (2) ◽  
pp. 349-351 ◽  
Author(s):  
J. DUECK
Keyword(s):  
Erwinia Amylovora ◽  
Apple Fruit ◽  
Mature Fruit ◽  
Water Suspension ◽  
Resistant Cultivars ◽  
Malus Sylvestris ◽  
Golden Delicious ◽  
Mature Apple

Mature fruit from naturally infected apple (Malus sylvestris Mill. ’Wealthy’) trees was free from a detectable population of Erwinia amylovora in the calyx, stem, peel and cortex. The pathogen failed to survive for 24 h on the surface of artificially inoculated fruit of Red and Golden Delicious apple in the orchard. In the laboratory, survival of the bacterium was excellent on the surface of apples when applied as natural ooze, or in a water suspension. Bacteria injected into the cortex of fruit of several cultivars survived as long as the apples were physiologically sound. Apples even from resistant cultivars developed symptoms of fireblight in storage. However, the absence of E. amylovora from symptomless fruit of naturally infected trees suggests that mature fruit presents a negligible risk for dissemination of fireblight bacteria.

scholarly journals Invasion and colonization of mature apple fruit by Erwinia amylovora tagged with bioluminescence genes

2005 ◽  
Vol 71 (1) ◽  
pp. 98-98
Author(s):  
Koji Azegami ◽  
Takanori Tsukamoto ◽  
Takayuki Matsuura ◽  
Tatsuji Ohara ◽  
Yasuhiro Inoue ◽  
...  
Keyword(s):  
Erwinia Amylovora ◽  
Apple Fruit ◽  
Mature Apple

Erwinia amylovora can pass through the abscission layer of fruit-bearing twigs and invade apple fruit during fruit maturation

2006 ◽  
Vol 72 (1) ◽  
pp. 43-45 ◽  
Author(s):  
Koji Azegami ◽  
Takanori Tsukamoto ◽  
Takayuki Matsuura ◽  
Yasuhiro Inoue ◽  
Hiroshi Uematsu ◽  
...  
Keyword(s):  
Erwinia Amylovora ◽  
Apple Fruit ◽  
Fruit Maturation ◽  
Abscission Layer ◽  
Pass Through

scholarly journals McWRI1, a transcription factor of the AP2/SHEN family, regulates the biosynthesis of the cuticular waxes on the apple fruit surface under low temperature

PLoS ONE ◽  
2017 ◽  
Vol 12 (10) ◽  
pp. e0186996 ◽  
Author(s):  
Suxiao Hao ◽  
Yiyi Ma ◽  
Shuang Zhao ◽  
Qianlong Ji ◽  
Kezhong Zhang ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Low Temperature ◽  
Apple Fruit ◽  
Cuticular Waxes ◽  
Fruit Surface

A novel α-amylase gene is transiently upregulated during low temperature exposure in apple fruit

2000 ◽  
Vol 267 (5) ◽  
pp. 1313-1322 ◽  
Author(s):  
Teresa Wegrzyn ◽  
Katrina Reilly ◽  
Guido Cipriani ◽  
Peter Murphy ◽  
Richard Newcomb ◽  
...  
Keyword(s):  
Low Temperature ◽  
Apple Fruit ◽  
Amylase Gene ◽  
Temperature Exposure ◽  
Low Temperature Exposure

Identification of low-temperature-regulated genes in the fire blight pathogenErwinia amylovora

2006 ◽  
Vol 52 (5) ◽  
pp. 468-475 ◽  
Author(s):  
Claudia Goyer ◽  
Matthias S Ullrich
Keyword(s):  
Low Temperature ◽  
Fire Blight ◽  
Plant Pathogens ◽  
Erwinia Amylovora ◽  
Type Ii Secretion ◽  
Genetic Loci ◽  
Cold Temperatures ◽  
Transposon Insertion ◽  
Fold Induction ◽  
Gusa Gene

Genes involved in pathogenicity of several plant pathogens were shown to be induced at relatively cold temperatures. Loci from the fire blight pathogen Erwinia amylovora (Burrill) induced at 18 °C were identified using the miniTn5 transposon that contains the promoterless reporter gene gusA coding for β-glucuronidase (GUS). Certain mutants (2.7%) expressed GUS predominantly at 18 °C on minimal medium plates, indicating that the transposon had been inserted downstream of a putatively thermoregulated promoter. Those mutants were further screened with a quantitative GUS fluorometric assay. A total of 21 mutants were selected: 19 mutants had a transposon insertion in temperature-dependent genetic loci, with a 2.2- to 6.3-fold induction of gusA gene expression at 18 °C, and two mutants with impaired growth at 18 °C. Some of these genetic loci encoded (i) proteins implicated in flagella biosynthesis, biotin biosynthesis, multi-drug efflux, and type II secretion protein, and (ii) proteins of unknown function.Key words: fire blight, Erwinia amylovora, transposon mutagenesis, gene regulation, low temperature.

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