Comprehensive characterization of the ALMT and MATE families on Populus trichocarpa and gene co-expression network analysis of its members during aluminium toxicity and phosphate starvation stresses

3 Biotech
Thiago Bergamo CardosoLuciano Vilela Paiva

Abstract

Aluminium (Al) toxicity and phosphate deficit on soils are some of the main problems of modern agriculture and are usually associated. Some plants are able to overcome these stresses through exuding organic acids on the rhizosphere, such as citrate and malate, which are exported by MATE (Multi drug and toxin extrusion) and ALMT (Aluminium-activated malate transporter) transporters, respectively. Despite its co-action on acidic soils, few studies explore these two families' correlation, especially on tree crops, therefore we performed a comprehensive description of MATE and ALMT families on Populus trichocarpa as a model species for arboreal plants. We found 20 and 56 putative members of ALMT and MATE families, respectively. Then, a gene co-expression network analysis was performed using broad transcriptomic data to analyze which members of each family were transcriptionally associated. Four independent networks were generated, one of which is composed of members putatively related to phosphate starvation and aluminum toxicity stresses. The PoptrALMT10 and PoptrMATE54 genes were selected from this network for a deeper analysis, which revealed that in roots under phosphate starvation stress the two genes have independent transcri...Continue Reading

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