Abstract

The use of biocontrol agents with plant growth-promoting activity has emerged as an approach to support sustainable agriculture. During our field evaluation of potato plants treated with biocontrol rhizobacteria, four bacteria were associated with increased plant height. Using two important solanaceous crop plants, tomato and potato, we carried out a comparative analysis of the growth-promoting activity of the four bacterial strains: Pseudomonas fluorescens SLU99, Serratia plymuthica S412, S. rubidaea AV10, and S. rubidaea EV23. Greenhouse and in vitro experiments showed that P. fluorescens SLU99 promoted plant height, biomass accumulation, and yield of potato and tomato plants, while EV23 promoted growth in potato but not in tomato plants. SLU99 induced the expression of plant hormone-related genes in potato and tomato, especially those involved in maintaining homeostasis of auxin, cytokinin, gibberellic acid and ethylene. Our results reveal potential mechanisms underlying the growth promotion and biocontrol effects of these rhizobacteria and suggest which strains may be best deployed for sustainably improving crop yield.

Keywords

PGPR; plant growth-promoting rhizobacteria; Pseudomonas fluorescens; beneficial bacteria; IAA; ethylene; Serratia; transcriptome (RNA-seq)

Published in

Frontiers in Plant Science
2023, Volume: 14, article number: 1141692.

SLU Authors

• Hanifah, Nurul Atilia Shafienaz binti

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

• Ghadamgahi, Farideh

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

• Ghosh, Samrat

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

• Ortiz Rios, Rodomiro Octavio

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

• Vetukuri, Ramesh

  • Department of Plant Biology, Swedish University of Agricultural Sciences
    

• Kalyandurg, Pruthvi Balachandra

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

Associated SLU-program

SLU Plant Protection Network


Sustainable Development Goals

End hunger, achieve food security and improved nutrition and promote sustainable agriculture
Take urgent action to combat climate change and its impacts


UKÄ Subject classification

Agricultural Science
Horticulture


Publication identifier

DOI: https://doi.org/10.3389/fpls.2023.1141692

Permanent link to this page (URI)

https://res.slu.se/id/publ/122752