Accumulating evidences of callose priming by indole- 3- carboxylic acid in response to Plectospharella cucumerina

ABSTRACT

Indole-3-carboxylic acid (I3CA) is an indolic compound that induces resistance in Arabidopsis adult plants against the necrotrophic fungus Plectosphaerella cucumerina through primed callose accumulation. In this study, we confirm the relevance of ATL31 and SYP121 genes involved in vesicular trafficking in I3CA priming of defenses and we discard camalexin as a mediator of I3CA-induced resistance (IR) in adult plants. In addition, we observed that an intact I3CA biosynthetic pathway is necessary for I3CA-IR functionality.

KEYWORDS:

• Indole-3-carboxylic acid
• ATL31
• SYP121
• PEN1
• Plectosphaerella cucumerina
• induced resistance
• priming

Acknowledgments

We thank the Serveis Centrals de la Universitat Jaume I for its technical support. This work was financially supported by the Plan de Promoción de la Investigación de la Universitat Jaume I UJI-B2016-43, MINECO AGL2015-64990-C2-2 and the Generalitat Valenciana AICO/2016/029.

Disclosure of Potential Conflicts of Interest

No potential conflicts of interest are disclosed.

Additional information

Funding

This work was supported by the Conselleria d’Educació, Investigació, Cultura i Esport [AICO/2016/029];Secretaría de Estado de Investigación, Desarrollo e Innovación [AGL2015-64990-C2-2];Universitat Jaume I [UJI-B2016-43].