Purification and immunocytolocalization of a novel Phytophthora boehmeriae protein inducing the hypersensitive response and systemic acquired resistance in tobacco and Chinese cabbage

2003 ◽  
Vol 63 (4) ◽  
pp. 223-232 ◽  
Author(s):  
Y.C. Wang ◽  
D.W. Hu ◽  
Z.G. Zhang ◽  
Z.C. Ma ◽  
X.B. Zheng ◽  
...  
Keyword(s):  
Chinese Cabbage ◽  
Hypersensitive Response ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Phytophthora Boehmeriae

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.

scholarly journals HrpNEa Induces Chinese Cabbage Resistance to Bacterial Soft Rot by Inhibiting the Bacterial Attachment to Root Surfaces

Plant Disease ◽  
2010 ◽  
Vol 94 (12) ◽  
pp. 1441-1447 ◽  
Author(s):  
Lijun Sun ◽  
Xiaomeng Wang ◽  
Shuping Qu ◽  
Huimin Liu ◽  
Zhenhua Jia ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Chinese Cabbage ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Soft Rot ◽  
Bacterial Attachment ◽  
Dependent Manner ◽  
Bacterial Soft Rot ◽  
Root Surfaces ◽  
Quorum Sensing Signals

HrpNEa is a harpin protein produced by the bacterial plant pathogen Erwinia amylovora. When applied to aerial parts of plants, the protein induces systemic acquired resistance in a variety of plant species. Here, we report that treating Chinese cabbage roots with HrpNEa induces resistance of the plant to Pectobacterium carotovora subsp. carotovora, the pathogen that invades roots and causes bacterial soft rot in cruciferous plants. Treating Chinese cabbage roots with HrpNEa significantly decreased severities of soft rot symptoms on the plant. The root treatment decreased the number of P. carotovora subsp. carotovora cells attached to root surfaces and inhibited the ability of P. carotovora subsp. carotovora to produce quorum-sensing signals, which regulate pathogenicity in a bacterial population-dependent manner. The inhibitory effects of HrpNEa on the root attachment and quorum-sensing signals accompanied the induced expression of several defense response genes. These results suggest that HrpNEa induces Chinese cabbage resistance to bacterial soft rot by inhibiting the bacterial attachment to root surfaces.

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
Sign in / Sign up

Export Citation Format

Share Document