A new insight into the contribution of putrescine to defense in Arabidopsis thaliana
Year: 2021
Type: article
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.
Source: Plant Signaling & Behavior
Authors: Changxin Liu, Rubén Alcázar
Institution: Universitat de Barcelona
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W3126405837