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Related Experiment Video

Updated: Nov 21, 2025

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem

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Published on: October 1, 2015

Cabbage defense response provoked by Trichoderma Th-LAAO.

Chia-Min Liu¹, Shu-Ying Liu², Chuan-Kai Liao¹

¹Department of Life Science, National Dong Hwa University, Hualien, Taiwan, ROC.

Archives of Microbiology

|January 12, 2021

Summary

Trichoderma L-amino acid oxidase (Th-LAAO) protects cabbage from Botrytis cinerea by boosting photosynthesis and activating plant defenses. This enzyme enhances growth and resistance in infected plants.

Keywords:

Botrytis cinerea Cabbage Th-LAAO Trichoderma

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Last Updated: Nov 21, 2025

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Published on: May 14, 2008

Area of Science:

Plant pathology
Molecular biology
Biochemistry

Background:

Botrytis cinerea infection causes significant damage to cabbage crops.
Understanding plant-microbe interactions is crucial for developing sustainable agriculture.
Trichoderma species are known for their beneficial effects on plants.

Purpose of the Study:

To elucidate the molecular mechanisms by which Trichoderma L-amino acid oxidase (Th-LAAO) protects cabbage from Botrytis cinerea.
To investigate the impact of Th-LAAO on cabbage growth promotion and defense responses.

Main Methods:

Establishment of a three-way interaction system involving cabbage, Botrytis cinerea, and Th-LAAO.
Application of purified Th-LAAO to cabbage leaves.
Quantitative analysis of gene expression related to photosynthesis and defense.

Main Results:

Th-LAAO treatment significantly reduced leaf damage caused by B. cinerea.
Increased expression of photosynthesis-related genes (e.g., Rubisco, ATP synthase) and sucrose transport protein 1.
Upregulation of ascorbate peroxidase and downregulation of pathogenesis-related genes (PR1, chitinase, β-1,3 glucanase, GST).

Conclusions:

Th-LAAO stimulates CO2 fixation and sucrose transport in cabbage.
Th-LAAO elicits host defense responses, contributing to induced systemic resistance against B. cinerea.
Th-LAAO shows potential as a biocontrol agent for cabbage diseases.