Evidence for the plant recruitment of beneficial microbes to suppress soil‐borne pathogens

Liu, Hongwei and Li, Jiayu and Carvalhais, Lilia C. and Percy, Cassandra D. ORCID: https://orcid.org/0000-0002-7807-6764 and Verma, Jay Prakash and Schenk, Peer M. and Singh, Brajesh K. (2021) Evidence for the plant recruitment of beneficial microbes to suppress soil‐borne pathogens. New Phytologist, 229 (5). pp. 2873-2885. ISSN 0028-646X


Abstract

An emerging experimental framework suggests that plants under biotic stress may actively seek help from soil microbes, but empirical evidence underlying such a ‘cry for help’ strategy is limited. We used integrated microbial community profiling, pathogen and plant transcriptive gene quantification and culture-based methods to systematically investigate a three-way interaction between the wheat plant, wheat-associated microbiomes and Fusarium pseudograminearum (Fp). A clear enrichment of a dominant bacterium, Stenotrophomonas rhizophila (SR80), was observed in both the rhizosphere and root endosphere of Fp-infected wheat. SR80 reached 3.7 × 107 cells g−1 in the rhizosphere and accounted for up to 11.4% of the microbes in the root endosphere. Its abundance had a positive linear correlation with the pathogen load at base stems and expression of multiple defence genes in top leaves. Upon re-introduction in soils, SR80 enhanced plant growth, both the below-ground and above-ground, and induced strong disease resistance by boosting plant defence in the above-ground plant parts, but only when the pathogen was present. Together, the bacterium SR80 seems to have acted as an early warning system for plant defence. This work provides novel evidence for the potential protection of plants against pathogens by an enriched beneficial microbe via modulation of the plant immune system.


Statistics for USQ ePrint 41577
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Date Deposited: 18 Mar 2021 05:40
Last Modified: 14 Apr 2021 04:50
Uncontrolled Keywords: crown rot, endophytes, Fusarium pseudograminearum, plant microbiome, Stenotrophomonas rhizophila, wheat
Fields of Research (2008): 06 Biological Sciences > 0607 Plant Biology > 060704 Plant Pathology
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
Fields of Research (2020): 31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310805 Plant pathology
30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3004 Crop and pasture production > 300409 Crop and pasture protection (incl. pests, diseases and weeds)
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280102 Expanding knowledge in the biological sciences
26 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 2603 Grains and seeds > 260312 Wheat
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280101 Expanding knowledge in the agricultural, food and veterinary sciences
Identification Number or DOI: https://doi.org/10.1111/nph.17057
URI: http://eprints.usq.edu.au/id/eprint/41577

Actions (login required)

View Item Archive Repository Staff Only