The effect of arbuscular mycorrhiza on gene expression of sweet family in Medicago lupulina under conditions of high available phosphorus level

Abstract

BACKGROUND: According to modern concepts, the SWEET family may be the only family of plant sugar transporters that includes genes specifically expressed during the formation and development of plant symbiosis with fungi of arbuscular mycorrhiza. The data on the key genetic markers of the development of effective arbuscular mycorrhiza symbiosis can contribute an active development of organic agriculture in various conditions of phosphorus availability in the soil.

AIM: to evaluate the effect of arbuscular mycorrhiza on the expression of SWEET genes in M. lupulina L. during key stages of host plant development (stages of leaves rosette, stooling initiation, stooling, lateral branching initiation, lateral branching and flowering).

MATERIALS AND METHODS: The study was performed using a highly efficient plant-microbial system “Medicago lupulina + Rhizophagus irregularis” grown under conditions with a high content of available phosphorus in the substrate.

RESULTS: Under condition of high phosphorus level in the substrate it was shown for the first time the MlSWEET1b and MlSWEET3c genes in M. lupulina leaves were characterized by specific expression during mycorrhization.

CONCLUSIONS: MlSWEET1b and MlSWEET3c and their orthologs can be considered as marker genes of effective symbiosis development, as a tool of biotechnology to increase agricultural productivity with using biostimulants based on arbuscular mycorrhiza fungi.

Keywords

arbuscular mycorrhiza / Medicago lupulina / Rhizophagus irregularis / effective symbiosis / development / markers of symbiotic effiiency

Funding

Russian Science FoundationРоссийский научный фонд(22-16-00064)

RIGHTS & PERMISSIONS

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