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Effects of Auxin and SL Mutations on Lateral Root Density in Arabidopsis

This study investigates the relationship between auxin (NAA) and the strigolactone (SL) pathway, particularly focusing on mutants (cad, pad, rax, max2) in Arabidopsis. We assessed how these factors influence the glutathione pool and lateral root density (LRD) in Col-0 plants. Treating plants with exogenous SL (GR24) and measuring LRD revealed changes compared to untreated controls. Notably, we observed a reduced lateral root density in specific mutants, leading to insights on how auxins and SLs interact to regulate root architecture through glutathione dynamics.

mckenzie-reed
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Effects of Auxin and SL Mutations on Lateral Root Density in Arabidopsis

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  1. AUXIN (a) (b) Mutations (cad, pad, rax) BSO Endogenous SLs GR24 (Exogenous SL) MAX2 ↓Glutathione pool MAX2 ↑ Glutathione pool No changes in LATERAL ROOT DENSITY Lower LATERAL ROOT DENSITY LATERAL ROOT (c) (d) NAA NAA+ GR24 max3-9 max4-1 Col-0 max2-1 Col-0, max3-9, max4-1 max2-1 5.7 LRD fold change compared with untreated plants LRD fold change compared with untreated plants 4.3-4.9 3.4-3.5 3.5 2.8 + Lateral root density - + Lateral root density -

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