Toxicity of fusaric acid and beauvericin in tissue-cultured banana 'grand nain' and 'lakatan'

College

College of Science

Department/Unit

Biology

Document Type

Article

Source Title

Technology in Horticulture

Volume

3

Issue

15

Publication Date

2023

Abstract

Fusarium oxysporum forma specialis cubense (Foc) produces toxins known to contribute to virulence and infection in the host. Fusaric acid (FA) and beauvericin (BEA) are major toxins contributing to Foc virulence in the host plant. Recent advancements allow the production of disease-resistant crops via cell selection, a process that involves resistance screening of somaclones using phytotoxin exposure. Determination of the appropriate concentration is an important step for the toxin-based selection of disease-resistant plants. In this study, the toxicity of FA (0, 5, 10, 20, 30, 50, and 100 µm) and BEA (0, 5, 10, and 20 µm) in different tissues of banana cv. ‘Grand Nain’ and 'Lakatan' were investigated. Overall results indicated a positive relationship between the toxin concentration and plant sensitivity, as indicated by the degree of vascular browning rate. Results demonstrated that lower concentrations of BEA are required for phytotoxicity than in FA. Furthermore, a higher degree of vascular browning was recorded in the test tissues of ‘Lakatan’ treated with FA and BEA than in the ‘Grand Nain’ genotype, suggesting genotype-dependent sensitivity of banana to phytotoxins. To our knowledge, this study is the first to investigate the phytotoxicity of FA and BEA in callus cultures of banana ‘Lakatan.’

html

Disciplines

Biology

Keywords

Fusarium oxysporum; Bananas—Diseases and pests; Bananas—Toxicology

Upload File

wf_no

This document is currently not available here.

Share

COinS