A new insight into the contribution of putrescine to defense in Arabidopsis thaliana.
Plant Signal Behav
; 16(4): 1885187, 2021 04 03.
Article
in En
| MEDLINE
| ID: mdl-33576705
ABSTRACT
Polyamines are known to accumulate in response to stress. Compelling evidence indicate a protective role for polyamines during defense. However, signaling pathways underlying polyamine functions have not been fully elucidated. We recently found that the polyamine putrescine (Put) accumulates during effector triggered immunity (ETI). Treatment with Put triggered local and systemic transcriptional reprogramming partly overlapping with systemic acquired resistance (SAR) responses. In addition, Put treatment led to local salicylic acid (SA) accumulation and systemic defenses against virulent bacteria. Consistent with this, we found that Put signaling is mainly ROS dependent and partly compromised by ENHANCED DISEASE SUSCEPTIBILITY1 (EDS1), SALICYLIC ACID INDUCTION DEFICIENT 2 (SID2) and NONEXPRESSOR of PR GENES1 (NPR1) loss-of-function mutations. Here, we propose a preliminary model by which putrescine contributes to local and systemic defenses in Arabidopsis thaliana.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Putrescine
/
Arabidopsis
Language:
En
Journal:
Plant Signal Behav
Journal subject:
BOTANICA
/
FISIOLOGIA
Year:
2021
Document type:
Article
Affiliation country: