Page 8 - Volume 5, Issue 2, July 2012
Basic HTML Version
© Benaki Phytopathological Institute
Skandalis
et al.
36
Table 1
. Biochemical functions of Type III secretion system effector proteins of
Pseudomonas syringae
bacteria and role in HR or/and the plant
innate immunity mechanisms.
Effector
Function
Ref. strain
Arabidopsis
N. tabacum
Yeast*
N. benthamiana
b
Pea/Bean
Tomato
Avirulence
I
II
III
HopAB2 (avrPtoB)
Suppresses cell death & HR triggered by other effectors,
suppress FRK1/SIRK alters ethylene responses; targets
Pto/Fen/PAMP & RLKs/BAK1
P.s.t
DC3000
v v v
v Tomato
HopX1 (avrPphE
pto
)
Induces JA -responsive genes; suppress HopA1-dep. HR
& RAP2.6
P.s.t
DC3000
v v v
Bean
HopAM1 (avrPpiB
pto
)
Enhances virulence on water-stressed plants
P.s.t
DC3000
v v x
Tomato
HopD1 (HopPtoD1)
Intermediate ability to suppress HR
P.s.t
DC3000
v
HopE (HopPtoE)
Inhibits HR & Arabidopsis WNK Kinase
P.s.t
DC3000
v v v
Lettuce
HopF2 (HopPtoF)
Suppressing the flagellin-induced
NHO1
expression;
targets R proteins RIN4/MKK5
P.s.t
DC3000
v v v v v v
HopF1 (avrPphF)
Suppresses R-gene induced cell death
P.s.ph
1449B
v Bean
HopK1 (HopPtoK)
Intermediate ability to suppress HR; suppress RAP2.6
P.s.t
DC3000
v
x
Lettuce
HopG1 (HopPtoG)
Targets mitochondria, alters plant development
& suppresses innate immunity
P.s.t
DC3000
x
v v v x
Tomato
HopAO1
Suppresses cell death Induce JA-resp. genes
P.s.t
DC3000
v
a
v
AvrRps4
Suppression of PTI
P.s.pi
151
v
Arabidopsis
AvrPto1
Suppressing the flagellin-induced NHO1& FRK1/SIRK;
interacts with Rab-GTPases; targets Pto/Fen/PAMP
P.s.t
JL1065
x v
v v v
v Tomato
AvrB1
Suppresses basal defences & RAP2.6; Induce JA-respon-
sive genes targets R prot. RIN4/RAR1/MPK4
P.s.gl
R4 & R0
v
Soybean
