Alkaloid toxins in endophyte-infected grasses

Area of Science:

• Mycology
• Plant Pathology
• Agricultural Science

Background:

• Grasses infected with clavicipitaceous fungi are linked to various animal diseases, including ergotism, fescue foot, and rye-grass staggers.
• Endophytic fungi, which grow entirely within host plants, are now recognized as widespread in grass species.
• These grass-fungal interactions involve complex chemistry, producing unique alkaloid profiles.

Purpose of the Study:

• To review alkaloids reported in endophyte-infected grasses.
• To explore the chemical ecology of grass-fungal endophyte interactions.
• To highlight the dual role of endophytes in causing disease and conferring plant benefits.

Main Methods:

• Review of scientific literature on endophyte-infected grasses.
• Analysis of reported alkaloid profiles in various grass-fungal pairings.
• Examination of field collections and herbarium specimens for endophyte prevalence.

Main Results:

• Endophyte-infected grasses produce a diverse array of alkaloids, with unique profiles for each grass-fungal combination.
• Some of these alkaloids are highly toxic to herbivores, contributing to livestock diseases.
• Endophyte presence can enhance grass survival through increased drought and insect resistance.

Conclusions:

• Endophytic fungi in grasses present a complex relationship, producing both toxic alkaloids and beneficial traits for the host plant.
• Understanding these alkaloid "fingerprints" is crucial for managing livestock health and improving grass resilience.
• Further research into the chemistry of these interactions can lead to agricultural applications.