Antifungal compounds from the root and root exudate of Zea mays

Area of Science:

• Agricultural Science
• Plant Pathology
• Natural Product Chemistry

Background:

• Soil-borne diseases caused by Fusarium oxysporum pose significant threats to crop production.
• Identifying natural inhibitors of plant pathogens is crucial for sustainable agriculture.

Purpose of the Study:

• To investigate the inhibitory effect of maize (Zea mays) on Fusarium oxysporum f. sp. melongenae.
• To isolate and identify antifungal compounds from maize roots and root exudates.

Main Methods:

• Maize plants were cultivated in test tubes to assess growth inhibition of Fusarium oxysporum.
• Ethanol extraction of maize roots was performed.
• Compounds were isolated from root extracts and root exudates using chromatographic techniques.
• Chemical structures of isolated compounds were elucidated.

Main Results:

• Maize plant cultivation in test tubes demonstrated significant inhibition of Fusarium oxysporum f. sp. melongenae growth.
• Two antifungal compounds, 6-methoxybenzoxazolinone and 6,7-dimethoxybenzoxazolinone, were isolated from the ethanol extract of Zea mays roots.
• Two additional compounds, (6R)-7,8-dihydro-3-oxo-alpha-ionone and (6R,9R)-7,8-dihydro-3-oxo-alpha-ionol, were isolated from the root exudate.

Conclusions:

• Maize possesses natural antifungal properties against the soil-borne pathogen Fusarium oxysporum.
• Specific benzoxazolinones and ionone derivatives from maize roots and exudates are responsible for the observed antifungal activity.
• These findings suggest the potential of maize-derived compounds as biocontrol agents against Fusarium wilt diseases.