Achtung: hohPublica wurde am 18.11.2024 aktualisiert. Falls Sie auf Darstellungsfehler stoßen, löschen Sie bitte Ihren Browser-Cache (Strg + Umschalt + Entf). *** Attention: hohPublica was last updated on November 18, 2024. If you encounter display errors, please delete your browser cache (Ctrl + Shift + Del).
 

A new version of this entry is available:

Loading...
Thumbnail Image
Article
2021

Role of benzoic acid and lettucenin A in the defense response of lettuce against soil-borne pathogens

Abstract (English)

Soil-borne pathogens can severely limit plant productivity. Induced defense responses are plant strategies to counteract pathogen-related damage and yield loss. In this study, we hypothesized that benzoic acid and lettucenin A are involved as defense compounds against Rhizoctonia solani and Olpidium virulentus in lettuce. To address this hypothesis, we conducted growth chamber experiments using hydroponics, peat culture substrate and soil culture in pots and minirhizotrons. Benzoic acid was identified as root exudate released from lettuce plants upon pathogen infection, with pre-accumulation of benzoic acid esters in the root tissue. The amounts were sufficient to inhibit hyphal growth of R. solani in vitro (30%), to mitigate growth retardation (51%) and damage of fine roots (130%) in lettuce plants caused by R. solani, but were not able to overcome plant growth suppression induced by Olpidium infection. Additionally, lettucenin A was identified as major phytoalexin, with local accumulation in affected plant tissues upon infection with pathogens or chemical elicitation (CuSO4) and detected in trace amounts in root exudates. The results suggest a two-stage defense mechanism with pathogen-induced benzoic acid exudation initially located in the rhizosphere followed by accumulation of lettucenin A locally restricted to affected root and leaf tissues.

File is subject to an embargo until

This is a correction to:

A correction to this entry is available:

This is a new version of:

Notes

Publication license

Publication series

Published in

Plants, 10 (2021), 11, 2336. https://doi.org/10.3390/plants10112336. ISSN: 2223-7747
Faculty
Institute

Examination date

Supervisor

Edition / version

Citation

DOI

ISSN

ISBN

Language
English

Publisher

Publisher place

Classification (DDC)
570 Biology

Original object

Standardized keywords (GND)

Sustainable Development Goals

BibTeX

@article{Windisch2021, url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16881}, doi = {10.3390/plants10112336}, author = {Windisch, Saskia and Walter, Anja and Moradtalab, Narges et al.}, title = {Role of Benzoic Acid and Lettucenin A in the Defense Response of Lettuce against Soil-Borne Pathogens}, journal = {Plants}, year = {2021}, }
Share this publication