Effect of Plant Growth Promoting Bacteria on the Growth of Wheat Seedlings Subjected to Phosphate Starvation

Certain phosphorous solubilizing (PSB) and phosphorous mineralizing (PMB) bacteria may improve plant growth by improving nutrient availability. The aim of this work was to evaluate the effect of inoculation with two Bacillus spp. strains, 12A and 25A, on wheat seedlings growth. To this aim, a durum and a bread wheat genotype were grown under controlled conditions in a low P compost medium to evaluate: (i) the effect of the bacterial isolates on plant growth and root system architecture; (ii) the expression of two key genes indicative of the P-starvation response and phosphate (Pi) uptake, TaIPS1 and TaPHT1.6-B1. The results showed that 12A Bacillus sp. significantly increased root length, surface area and biomass. Furthermore, an enhanced shoot dry weight and P content were observed. This might be explained by the capacity of strain 12A to produce indole-3-acetic acid (IAA) in addition to P mineralizing and P solubilizing capability. No effect on plant growth was observed for 25A strain. The semi-quantitative gene expression analysis showed an overall lower expression of TaIPS1 in the inoculated plants and highest expression of TaPHT1.6-B1 in 12A inoculated plants. This suggests that Pi-responsive genes might be useful molecular indicators for the effectiveness of PSB and PMB.

Data and Resources

Additional Info

Field Value
  • Name: Cataldi, Mariagrazia P., Type: Corresponding Author,
  • Name: Heuer, Sigrid, Type: Author,
  • Name: Mauchline, Tim H., Type: Author,
  • Name: Wilkinson, Mark D., Type: Author,
  • Name: Masters-Clark, Emily, Type: Author,
  • Name: Di Benedetto, Nilde A., Type: Author,
  • Name: Corbo, Maria Rosaria, Type: Author,
  • Name: Flagella, Zina, Type: Author,
Maintainer Email
Article Host Type publisher
Article Is Open Access true
Article License Type cc-by
Article Version Type publishedVersion
Citation Report https://scite.ai/reports/10.3390/agronomy10070978
DFW Organisation RRes
DFW Work Package 1
DOI 10.3390/agronomy10070978
Date Last Updated 2021-03-04T13:59:08.529614
Evidence oa journal (via doaj)
Funder Code(s)
Journal Is Open Access true
Open Access Status gold
PDF URL https://www.mdpi.com/2073-4395/10/7/978/pdf
Publisher URL https://doi.org/10.3390/agronomy10070978