scholarly journals Polygalacturonase and xylanase forms produced by Fusarium avenaceum in infected lupin roots and their sensitivity to a cell wall glycoprotein

2013 ◽  
Vol 48 (1) ◽  
pp. 53-59
Author(s):  
Urszula Małolepsza ◽  
Elżbieta Kuźniak ◽  
Jacek Patykoeski ◽  
Henryk Urbaniak
Keyword(s):  
Cell Wall ◽  
Column Chromatography ◽  
Fusarium Avenaceum ◽  
Sepharose Column ◽  
A Cell

Using CM-Sepharose column chromatography it was shown that <em>Fusarium avenaceum</em> produced two forms of endo-polygalacturonase, one exo-polygalacturonase and two forms of endo-xylanase in infected Iupin roots. A glycoprotein obtained from lupin seedlings inhibited endo-polygalacturonases, exo-polygalacturonases and xylanases but more the first ones. Two forms of endo-polygalacturonase did not differ in their sensitivity to the glycoprotein.

scholarly journals Genetic and structural validation of phosphomannomutase as a cell wall target in Aspergillus fumigatus

2021 ◽  
Author(s):  
Yuanwei Zhang ◽  
Wenxia Fang ◽  
Olawale G. Raimi ◽  
Deborah E. A. Lockhart ◽  
Andrew T. Ferenbach ◽  
...  
Keyword(s):  
Cell Wall ◽  
Aspergillus Fumigatus ◽  
A Cell ◽  
Structural Validation

Cytological and histochemical characteristics of the axenic root surface of Alnus glutinosa

1986 ◽  
Vol 64 (10) ◽  
pp. 2216-2226 ◽  
Author(s):  
Yves Prin ◽  
Mireille Rougier
Keyword(s):  
Cell Wall ◽  
Root Hair ◽  
Root Hairs ◽  
Root Apex ◽  
Alnus Glutinosa ◽  
Root Surface ◽  
Infection Process ◽  
Root Cap ◽  
A Cell ◽  
Histochemical Tests

The aim of the present study was to investigate the Alnus root surface using seedlings grown axenically. This study has focused on root zones where infection by the symbiotic actinomycete Frankia takes place. The zones examined extend from the root cap to the emerging root hair zone. The root cap ensheaths the Alnus root apex and extends over the root surface as a layer of highly flattened cells closely appressed to the root epidermal cell wall. These cells contain phenolic compounds as demonstrated by various histochemical tests. They are externally bordered by a thin cell wall coated by a thin mucilage layer. The root cap is ruptured when underlying epidermal cells elongate, and cell remnants are still found in the emerging root hair zone. Young emerging root hairs are bordered externally by a cell wall covered by a thin mucilage layer which reacts positively to the tests used for the detection of polysaccharides, glycoproteins, and anionic sites. The characteristics of the Alnus root surface and the biological function of mucilage and phenols present at the root surface are discussed in relation to the infection process.

scholarly journals A Banana PHD-Type Transcription Factor MaPHD1 Represses a Cell Wall-Degradation Gene MaXTH6 during Fruit Ripening

2017 ◽  
Vol 3 (5) ◽  
pp. 190-198 ◽  
Author(s):  
Wei WEI ◽  
Zhongqi FAN ◽  
Jianye CHEN ◽  
Jianfei KUANG ◽  
Wangjin LU ◽  
...  
Keyword(s):  
Cell Wall ◽  
Transcription Factor ◽  
Fruit Ripening ◽  
Cell Wall Degradation ◽  
A Cell

Electron microscopy of the replicative events of A25 bacteriophages in group A streptococci

1972 ◽  
Vol 18 (1) ◽  
pp. 93-96 ◽  
Author(s):  
S. E. Read ◽  
R. W. Reed
Keyword(s):  
Electron Microscopy ◽  
Cell Wall ◽  
Electron Microscope ◽  
Nucleic Acid ◽  
Group A Streptococcus ◽  
Group A Streptococci ◽  
Virulent Phage ◽  
Acid Pool ◽  
Group A ◽  
A Cell

The replicative events of a virulent phage (A25) infection of a group A Streptococcus (T253) were studied using the electron microscope. The first intracellular evidence of phage replication in a cell occurred 30 min after infection with arrest of cell division and increase in the nucleic acid pool. Phage heads were evident in the nucleic acid pool of the cells 45 min after infection. Release of phages occurred by splitting of the cell wall along discrete lines. This appeared to be at sites of active wall synthesis, i.e., near the region of septum formation. Many phage components were released but relatively few complete phages indicating a relatively inefficient replicative system.

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