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Related Experiment Video

Updated: Mar 18, 2026

Author Spotlight: Tissue Culture-Free Agrobacterium-Mediated Transformation in Large Woody Plants

Author Spotlight: Tissue Culture-Free Agrobacterium-Mediated Transformation in Large Woody Plants

Published on: November 17, 2023

Improved Bioassay Method for Plant Transformation Inhibitors.

H Kanzaki¹, T Kagemori¹, S Asano¹

¹a Laboratory of Bioresources Chemistry, Faculty of Agriculture, Okayama University.

Bioscience, Biotechnology, and Biochemistry

|July 10, 2016

Summary

This summary is machine-generated.

This study improved a bioassay for Agrobacterium tumefaciens plant transformation efficiency using Ageratum conyzoides cells. The new method allows for convenient colorimetric detection of beta-glucuronidase activity, aiding in the search for transformation inhibitors.

Keywords:

Ageratum conyzoides Agrobacterium tumefaciens GUS assay colorimetric measurement fluorometric measurement

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Agrobacterium tumefaciens-Mediated Genetic Transformation of Narrowleaf Plantain

Agrobacterium tumefaciens-Mediated Genetic Transformation of Narrowleaf Plantain

Published on: March 17, 2023

Area of Science:

Plant Biotechnology
Molecular Biology
Biochemistry

Background:

Evaluating Agrobacterium tumefaciens-mediated plant transformation efficiency is crucial for identifying inhibitors and understanding transformation mechanisms.
Previous bioassays relied on detecting beta-glucuronidase (GUS) expression in transformed plants, often requiring fluorometric analysis.
A need exists for a more convenient and quantitative bioassay method for plant transformation studies.

Purpose of the Study:

To improve a previously established bioassay for quantifying plant transformation efficiency mediated by Agrobacterium tumefaciens.
To adapt the bioassay for easier detection using colorimetric measurements.
To facilitate the screening of plant transformation inhibitors and biochemical probes.

Main Methods:

The improved method utilizes suspension-cultured cells of Ageratum conyzoides as the host plant, replacing Nicotiana tabacum BY-2.
Beta-glucuronidase (GUS) activity in transformed plant cells is measured.
Enzyme activity is assessed using both fluorometric and colorimetric detection methods.

Main Results:

Ageratum conyzoides cells exhibited approximately 100 times higher beta-glucuronidase (GUS) enzyme activity compared to Nicotiana tabacum BY-2.
The elevated GUS activity in A. conyzoides cells is sufficient for reliable colorimetric detection.
The enhanced sensitivity allows for a more convenient determination of inhibitory activity against plant transformation.

Conclusions:

The improved bioassay using Ageratum conyzoides suspension cells offers a convenient and quantitative method for evaluating plant transformation efficiency.
The colorimetric detection capability significantly simplifies the process compared to fluorometric methods.
This enhanced bioassay is valuable for screening plant transformation inhibitors and advancing research on transformation mechanisms.