Effects of Penicillium bilaii on maize growth are mediated by available phosphorus

B. Gómez-Muñoz, L. S. Jensen, A. de Neergaard, A. E. Richardson, J. Magid*

*Corresponding author

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstract

Background and aims: Inoculation with Penicillium bilaii has been reported to increase plant growth, which is attributed to increase availability of phosphorus (P), but similar effects have been observed with no P limitation, suggesting that other mechanisms may be involved. The aim of this work was to evaluate the interaction between available soil P and P. bilaii inoculation on plant growth. Methods: Maize plants (Zea mays) inoculated with P. bilaii and non-inoculated were grown in pot experiments in three soils with different inherent P availability, and in a low P availability soil with different additions of mineral P, both with and without supplementation of all other macro and micronutrients. Results: We found a positive interaction between P bilaii and available P, when other nutrients were applied, with P bilaii inoculation resulting in increased root growth and thus nutrient uptake and plant growth. By contrast, when other nutrients were not supplied, little effect on plant growth or P uptake was observed, except for root length that tended to decrease in inoculated plants with P addition. Conclusions: The effects of P. bilaii inoculation were related to root growth and function, but were dependent on the nutrient status in the soil environment.

OriginalsprogEngelsk
TidsskriftPlant and Soil
Vol/bind431
Udgave nummer1-2
Sider (fra-til)159-173
Antal sider15
ISSN0032-079X
DOI
StatusUdgivet - 2018
Udgivet eksterntJa

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