# Wheat microbiome review examines the gap between laboratory inhibition and plant protection > A CSIRO mini-review brings together evidence on wheat-associated microbes, their antifungal activity and the effects of crop management. It calls for studies that connect microbial chemistry with interactions inside the plant and its environment. URL: https://foodradar.org/wheat-microbiome-review-outlines-biochemical-routes-for-fungal-suppression Language: en Author: FoodRadar Editorial Published: 2026-10-15T20:50:05.019775+00:00 Updated: 2026-10-24T19:52:56.743Z Source publication date: 2026-09-24 Category: Research Türkçe: https://foodradar.org/tr/wheat-microbiome-review-outlines-biochemical-routes-for-fungal-suppression Español: https://foodradar.org/es/wheat-microbiome-review-outlines-biochemical-routes-for-fungal-suppression Deutsch: https://foodradar.org/de/wheat-microbiome-review-outlines-biochemical-routes-for-fungal-suppression Italiano: https://foodradar.org/it/wheat-microbiome-review-outlines-biochemical-routes-for-fungal-suppression Русский: https://foodradar.org/ru/wheat-microbiome-review-outlines-biochemical-routes-for-fungal-suppression ## The review examines communities around and inside wheat Microbes associated with wheat can help suppress fungal disease, but activity measured in an isolated laboratory test does not always translate into protection of the plant. A mini-review published in Biochemical Society Transactions on 24 September 2026 examines this gap and the biochemical and ecological processes behind disease suppression. The authors, from Australia’s Commonwealth Scientific and Industrial Research Organisation (CSIRO), bring together earlier studies rather than report a new field trial. The review covers microbial communities around roots, inside plant tissues, on leaves and in grain. Their composition depends on the seed microbiome, surrounding soil, plant traits and external conditions. Soil moisture, pH, nutrients and organic matter shape the pool of microbes available to wheat, while the plant influences which organisms become associated with its tissues. ## Laboratory activity and protection in the plant can differ Many studies test individual microbial strains outside the plant. The authors describe cases in which laboratory antifungal activity failed to translate under field conditions, as well as microbes that showed little inhibition in an isolated test but protected plants. These differences are a reason to examine plant interactions and the wider microbial community alongside individual organisms. In an example from their earlier work, the authors describe two bacterial strains whose strong inhibition in laboratory tests translated into a smaller reduction in wheat disease severity in plant experiments. The review uses this case to illustrate the value of linking different types of evidence. The results belong to the cited earlier research. ## Several processes can contribute to disease suppression The review describes competition for nutrients and space, microbial enzymes and metabolites, and stimulation of plant defences as routes through which microbes may suppress disease. It draws on work involving wheat as well as other crops and model plants. The authors identify gaps in understanding how these activities function biochemically within the wheat plant and its environment. Molecular approaches have expanded knowledge of microbial communities and their potential chemistry, including organisms that are difficult to cultivate. However, many predicted gene clusters have unknown products, and laboratory conditions may not reproduce the biological and environmental signals that affect production of microbial compounds. The authors call for combining culture-based and culture-independent work with studies in the organisms’ natural setting. ## Management effects depend on the crop and microbial context Repeated wheat cropping can increase soilborne disease and reduce yield. The review also describes the development of soils that suppress a particular disease after prolonged wheat monoculture. Such suppression is pathogen-specific, and changes in the microbiome do not necessarily compensate for disease and yield penalties caused by sustained pathogen pressure. No-till practices and residue retention can support soil microbes and disease suppression, but wheat residues can also carry pathogens between crops. Pesticides can affect beneficial organisms and microbial interactions. The review also cites a rotation and management study in which plant organ and age were stronger drivers of community composition than the management differences examined. ## The authors call for linking chemistry, communities and plant resistance Wheat itself influences microbial recruitment through substances released by its roots. Their composition changes with plant development, genotype, nutrient availability, soil conditions and stress. The authors describe a reciprocal relationship between plant physiology and microbiome assembly, with effects that can differ between soils and over time. The conclusion calls for moving beyond individual-strain studies towards an understanding of communities and mechanisms. The proposed directions include disease-suppressive soils, microbial biological control and microbe-derived compounds, integrated with crop management and conventional breeding for disease resistance. The authors present these as research and development pathways for complementary crop protection. CSIRO funded the work. The authors declared no competing interests. They describe the paper as a mini-review whose available space limited the literature discussed. ## Sources and rights - [Exploring the antifungal activity of the wheat microbiome](https://doi.org/10.1042/BST20250408?utm_source=foodradar.org&utm_medium=referral&utm_campaign=editorial&utm_content=wheat-microbiome-review-outlines-biochemical-routes-for-fungal-suppression-en). Biochemical Society Transactions. Louise F. Thatcher, Simon R. Law, Lachlan Dow and Lygie Esquirol (2026). Exploring the antifungal activity of the wheat microbiome. Biochemical Society Transactions 54(10), 1331–1342. DOI: 10.1042/BST20250408. © 2026 The Authors. Published by Portland Press Limited on behalf of the Biochemical Society. CC BY 4.0. Editorial adaptation and translation: FoodRadar. [CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/?utm_source=foodradar.org&utm_medium=referral&utm_campaign=editorial&utm_content=wheat-microbiome-review-outlines-biochemical-routes-for-fungal-suppression-en-license). Adapted by FoodRadar. [Editorial standards](https://foodradar.org/editorial-policy)