Inoculation with the mycorrhizal fungus Rhizophagus irregularis modulates the relationship between root growth and nutrient content in maize (Zea mays ssp. mays L.)

  • M. Rosario Ramírez-Flores
  • , Elohim Bello-Bello
  • , Rubén Rellán-Álvarez
  • , Ruairidh J.H. Sawers
  • , Víctor Olalde-Portugal

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Plant root systems play a fundamental role in nutrient and water acquisition. In resource-limited soils, modification of root system architecture is an important strategy to optimize plant performance. Most terrestrial plants also form symbiotic associations with arbuscular mycorrhizal fungi to maximize nutrient uptake. In addition to direct delivery of nutrients, arbuscular mycorrhizal fungi benefit the plant host by promoting root growth. Here, we aimed to quantify the impact of arbuscular mycorrhizal symbiosis on root growth and nutrient uptake in maize. Inoculated plants showed an increase in both biomass and the total content of twenty quantified elements. In addition, image analysis showed mycorrhizal plants to have denser, more branched root systems. For most of the quantified elements, the increase in content in mycorrhizal plants was proportional to root and overall plant growth. However, the increase in boron, calcium, magnesium, phosphorus, sulfur, and strontium was greater than predicted by root system size alone, indicating fungal delivery to be supplementing root uptake.

Original languageEnglish
Article numbere00192
JournalPlant Direct
Volume3
Issue number12
DOIs
StatePublished - Dec 1 2019

Funding

We thank Greg Ziegler and Ivan Baxter (Danforth Center, MO) for ionomic analysis and Benjamin Barrales Gámez for assistance in the greenhouse experiment. We thank the reviewers for constructive feedback on the manuscript. M. Rosario Ramírez‐Flores was supported by the Mexican National Council of Science and Technology (CONACYT) through its PhD scholarship program. This work was supported by the Mexican National Commission for the Study and Use of Biodiversity (CONABIO) project . Impact of native arbuscular mycorrhizal fungi on maize performance We thank Greg Ziegler and Ivan Baxter (Danforth Center, MO) for ionomic analysis and Benjamin Barrales G?mez for assistance in the greenhouse experiment. We thank the reviewers for constructive feedback on the manuscript. M. Rosario Ram?rez-Flores was supported by the Mexican National Council of Science and Technology (CONACYT) through its PhD scholarship program. This work was supported by the Mexican National Commission for the Study and Use of Biodiversity (CONABIO) project Impact of native arbuscular mycorrhizal fungi on maize performance.

Keywords

  • image analysis
  • ionomics
  • maize
  • maize/Zea mays
  • mycorrhizae/mycorrhizal symbiosis
  • nutrient uptake and metabolism
  • root development

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