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Experimental study reveals that fungal gliotoxin primes immune defenses in tomato plants, indicating distinct plant-fungal interactions compared to animal immunosuppression.
A single fungal metabolite induces far-reaching transcriptomic reprogramming in the plant, priming immune responses and defense, in contrast to its immunosuppressive effect on animal cells. While the negative effects of gliotoxin-producing Trichoderma strains on growth may be observed only under a particular set of laboratory conditions, gliotoxin-linked molecular patterns, including the potential for limited cell death, could strongly prime plant defense, even in mature soil-grown plants in which the same Trichoderma strain promotes growth.
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Zaid et al. (2022) studied this question.
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