Stenotrophomonas rhizophila Ep2.2 inhibits growth of Botrytis cinerea through the emission of volatile organic compounds, restricts leaf infection and primes defense genes

Frontiers in Plant Science

Plant Science

Xiaoyulong Chen¹  Francesca Orlando²  Claudio Pugliesi²  Luisa Neri³  Rita Baraldi³  Ivan Baccelli⁴  Aida Raio⁴  Federico Brilli⁴ 

[1]College of Agriculture, College of Tobacco Science, Guizhou University, Guiyang, China

[2]Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy

[3]Institute for BioEconomy (IBE), National Research Council of Italy (CNR), Bologna, Italy

[4]Institute for Sustainable Plant Protection (IPSP), National Research Council of Italy (CNR), Florence, Italy

关键词: beneficial microbes;    biological control agents (BCAs);    Solanum lycopersicum;    plant pathogens;    plant microbiome;    induced resistance;    defense priming;    antimicrobial VOCs;   

DOI  :  10.3389/fpls.2023.1235669

 received in 2023-06-06, accepted in 2023-09-05,  发布年份 2023

来源: Frontiers

【 摘 要 】

The bacterium Stenotrophomonas rhizophila is known to be beneficial for plants and has been frequently isolated from the rhizosphere of crops. In the present work, we isolated from the phyllosphere of an ornamental plant an epiphytic strain of S. rhizophila that we named Ep2.2 and investigated its possible application in crop protection. Compared to S. maltophilia LMG 958, a well-known plant beneficial species which behaves as opportunistic human pathogen, S. rhizophila Ep2.2 showed distinctive features, such as different motility, a generally reduced capacity to use carbon sources, a greater sensitivity to fusidic acid and potassium tellurite, and the inability to grow at the human body temperature. S. rhizophila Ep2.2 was able to inhibit in vitro growth of the plant pathogenic fungi Alternaria alternata and Botrytis cinerea through the emission of volatile compounds. Simultaneous PTR-MS and GC-MS analyses revealed the emission, by S. rhizophila Ep2.2, of volatile organic compounds (VOCs) with well-documented antifungal activity, such as furans, sulphur-containing compounds and terpenes. When sprayed on tomato leaves and plants, S. rhizophila Ep2.2 was able to restrict B. cinerea infection and to prime the expression of Pti5, GluA and PR1 plant defense genes.

【 授权许可】

Unknown   
Copyright © 2023 Raio, Brilli, Neri, Baraldi, Orlando, Pugliesi, Chen and Baccelli