TY - JOUR
T1 - A Marine Bacterium with Animal-Pathogen-Like Type III Secretion Elicits the Nonhost Hypersensitive Response in a Land Plant
AU - Lee, Boyoung
AU - Lee, Jeong Im
AU - Kwon, Soon Kyeong
AU - Ryu, Choong Min
AU - Kim, Jihyun F.
N1 - Publisher Copyright:
© 2023 Korean Society of Plant Pathology. All rights reserved.
PY - 2023/12
Y1 - 2023/12
N2 - Active plant immune response involving programmed cell death called the hypersensitive response (HR) is elicited by microbial effectors delivered through the type III secretion system (T3SS). The marine bacterium Hahella chejuensis contains two T3SSs that are similar to those of animal pathogens, but it was able to elicit HR-like cell death in the land plant Nicotiana benthamiana. The cell death was comparable with the transcriptional patterns of H. chejuensis T3SS-1 genes, was mediated by SGT1, a general regulator of plant resistance, and was suppressed by AvrPto1, a type III-secreted effector of a plant pathogen that inhibits HR. Thus, type III-secreted effectors of a marine bacterium are capable of inducing the nonhost HR in a land plant it has never encountered before. This suggests that plants may have evolved to cope with a potential threat posed by alien pathogen effectors. Our work documents an exceptional case of nonhost HR and provides an expanded perspective for studying plant nonhost resistance.
AB - Active plant immune response involving programmed cell death called the hypersensitive response (HR) is elicited by microbial effectors delivered through the type III secretion system (T3SS). The marine bacterium Hahella chejuensis contains two T3SSs that are similar to those of animal pathogens, but it was able to elicit HR-like cell death in the land plant Nicotiana benthamiana. The cell death was comparable with the transcriptional patterns of H. chejuensis T3SS-1 genes, was mediated by SGT1, a general regulator of plant resistance, and was suppressed by AvrPto1, a type III-secreted effector of a plant pathogen that inhibits HR. Thus, type III-secreted effectors of a marine bacterium are capable of inducing the nonhost HR in a land plant it has never encountered before. This suggests that plants may have evolved to cope with a potential threat posed by alien pathogen effectors. Our work documents an exceptional case of nonhost HR and provides an expanded perspective for studying plant nonhost resistance.
KW - hypersensitive reaction
KW - nonhost resistance
KW - nucleotide-binding leucine-rich repeat protein
KW - type III secretion system
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U2 - 10.5423/PPJ.FT.09.2023.0125
DO - 10.5423/PPJ.FT.09.2023.0125
M3 - Article
AN - SCOPUS:85179337134
SN - 1598-2254
VL - 39
SP - 584
EP - 591
JO - Plant Pathology Journal
JF - Plant Pathology Journal
IS - 6
ER -