scholarly journals Different epitopes of Ralstonia solanacearum effector RipAW are recognized by two Nicotiana species and trigger immune responses

2021 ◽  
Author(s):  
Yang Niu ◽  
Shouyang Fu ◽  
Gong Chen ◽  
Huijuan Wang ◽  
Yisa Wang ◽  
...  
Keyword(s):  
Immune Responses ◽  
Ralstonia Solanacearum ◽  
Nicotiana Species

scholarly journals Intra-strain elicitation and suppression of plant immunity by Ralstonia solanacearum type-III effectors in Nicotiana benthamiana

2019 ◽  
Author(s):  
Yuying Sang ◽  
Wenjia Yu ◽  
Haiyan Zhuang ◽  
Yali Wei ◽  
Lida Derevnina ◽  
...  
Keyword(s):  
Immune System ◽  
Immune Responses ◽  
Ralstonia Solanacearum ◽  
Plant Immunity ◽  
Plant Cells ◽  
Effector Proteins ◽  
Type Iii Effectors ◽  
Plant Immune System ◽  
Successful Infection ◽  
Genes Encoding

AbstractEffector proteins delivered inside plant cells are powerful weapons for bacterial pathogens, but this exposes the pathogen to potential recognition by the plant immune system. Therefore, the effector repertoire of a given pathogen must be balanced for a successful infection. Ralstonia solanacearum is an aggressive pathogen with a large repertoire of secreted effectors. One of these effectors, RipE1, is conserved in most R. solanacearum strains sequenced to date. In this work, we found that RipE1 triggers immunity in N. benthamiana, which requires the immune regulator SGT1, but not EDS1 or NRCs. Interestingly, RipE1-triggered immunity induces the accumulation of salicylic acid (SA) and the overexpression of several genes encoding phenylalanine-ammonia lyases (PALs), suggesting that the unconventional PAL-mediated pathway is responsible for the observed SA biosynthesis. Surprisingly, RipE1 recognition also induces the expression of jasmonic acid (JA)-responsive genes and JA biosynthesis, suggesting that both SA and JA may act cooperatively in response to RipE1. Finally, we found that RipE1 expression leads to the accumulation of glutathione in plant cells, which precedes the activation of immune responses. R. solanacearum encodes another effector, RipAY, which is known to inhibit immune responses by degrading cellular glutathione. Accordingly, we show that RipAY inhibits RipE1-triggered immune responses. This work shows a strategy employed by R. solanacearum to counteract the perception of its effector proteins by the plant immune system.

scholarly journals The Ralstonia solanacearum type III effector RipAY targets plant redox regulators to suppress immune responses

2016 ◽  
Vol 19 (1) ◽  
pp. 129-142 ◽  
Author(s):  
Yuying Sang ◽  
Yaru Wang ◽  
Hong Ni ◽  
Anne-Claire Cazalé ◽  
Yi-Min She ◽  
...  
Keyword(s):  
Immune Responses ◽  
Ralstonia Solanacearum ◽  
Type Iii Effector ◽  
Type Iii

Specific humoral immune responses in 12 cases of food sensitization to sesame seed

1997 ◽  
Vol 27 (11) ◽  
pp. 1285-1291 ◽  
Author(s):  
M. N. KOLOPP-SARDA ◽  
D. A. MONERET-VAUTRIN ◽  
B. GOBERT ◽  
G. KANNY ◽  
M. BRODSCHII ◽  
...  
Keyword(s):  
Immune Responses ◽  
Sesame Seed ◽  
Humoral Immune ◽  
Humoral Immune Responses ◽  
Food Sensitization
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