Induction of the Hypersensitive Response and Systemic Acquired Resistance by Fungal Proteins: The Case of Elicitins

1997 ◽  
pp. 53-75 ◽  
Author(s):  
Pierre Ricci
Keyword(s):  
Hypersensitive Response ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance

scholarly journals The Arabidopsis NSL2 negatively controls systemic acquired resistance via hypersensitive response

2011 ◽  
Vol 28 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Yutaka Asada ◽  
Masako Yamamoto ◽  
Tomokazu Tsutsui ◽  
Junji Yamaguchi
Keyword(s):  
Hypersensitive Response ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance

scholarly journals Elicitin Genes Expressed In Vitro by Certain Tobacco Isolates of Phytophthora parasitica Are Down Regulated During Compatible Interactions

2001 ◽  
Vol 14 (3) ◽  
pp. 326-335 ◽  
Author(s):  
Virginie Colas ◽  
Sandrine Conrod ◽  
Paul Venard ◽  
Harald Keller ◽  
Pierre Ricci ◽  
...  
Keyword(s):  
Hypersensitive Response ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Compatible Interaction ◽  
Phytophthora Parasitica ◽  
In Planta ◽  
Black Shank ◽  
Phytophthora Spp ◽  
Compatible Interactions

Phytophthora spp. secrete proteins called elicitins in vitro that can specifically induce hypersensitive response and systemic acquired resistance in tobacco. In Phytophthora parasitica, the causal agent of black shank, most isolates virulent on tobacco are unable to produce elicitins in vitro. Recently, however, a few elicitin-producing P. parasitica strains virulent on tobacco have been isolated. We investigated the potential diversity of elicitin genes in P. parasitica isolates belonging to different genotypes and with various virulence levels toward tobacco as well as elicitin expression pattern in vitro and in planta. Although elicitins are encoded by a multigene family, parA1 is the main elicitin gene expressed. This gene is highly conserved among isolates, regardless of the elicitin production and virulence levels toward tobacco. Moreover, we show that elicitin-producing P. parasitica isolates virulent on tobacco down regulate parA1 expression during compatible interactions, whichever host plant is tested. Conversely, one elicitin-producing P. parasitica isolate that is pathogenic on tomato and avirulent on tobacco still expresses parA1 in the compatible interaction. Therefore, some P. parasitica isolates may evade tobacco recognition by down regulating parA1 in planta. The in planta down regulation of parA1 may constitute a suitable mechanism for P. parasitica to infect tobacco without deleterious consequences for the pathogen.

Probenazole induces systemic acquired resistance in Arabidopsis with a novel type of action

2001 ◽  
Vol 25 (2) ◽  
pp. 149-157 ◽  
Author(s):  
Keiko Yoshioka ◽  
Hideo Nakashita ◽  
Daniel F. Klessig ◽  
Isamu Yamaguchi
Keyword(s):  
Systemic Acquired Resistance ◽  
Acquired Resistance
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