UNASSIGNED: The outgrowth of axillary buds into branches is regulated systemically via plant hormones and the demand of growing shoot tips for @entity3363 . The plant hormone auxin is thought to act via two mechanisms. One mechanism involves auxin regulation of systemic signals, cytokinins and @entity30861 , which can move into axillary buds. The other involves suppression of auxin transport/canalization from axillary buds into the main stem and is enhanced by a low sink for auxin in the stem. In this theory, the relative ability of buds and stem to transport auxin controls bud outgrowth. Here we evaluate whether auxin transport is required or regulated during bud outgrowth in @entity3587 ( @entity3587 ). The profound, systemic and long-term effects of the auxin transport inhibitor @entity51257 had very little inhibitory effect on bud outgrowth in strigolactone deficient mutants. @entity30861 can also inhibit bud outgrowth in @entity51257 -treated shoots that have greatly diminished auxin transport. Moreover strigolactones can inhibit bud outgrowth despite a much diminished auxin supply in in vitro or decapitated plants. These findings demonstrate that auxin sink strength in the stem is not important for bud outgrowth in @entity3587 . Consistent with alternative mechanisms of auxin-regulation of systemic signals, enhanced auxin biosynthesis in @entity958 can suppress branching in yuc1D plants compared to wild-type plants, but has no effect on bud outgrowth in a strigolactone-deficient mutant background.

XXXX inhibition of branching independent of polar auxin transport.

@entity51257 :: ('MESH:C002687', 'Chemical') :: ['N-1-naphthylphthalamic acid'] @entity30861 :: ('CHEBI:68487', 'Chemical') :: ['Strigolactones', 'strigolactones'] @entity3363 :: ('MESH:D002241', 'Chemical') :: ['sugars'] @entity958 :: ('3702', 'Species') :: ['Arabidopsis thaliana'] @entity3587 :: ('3888', 'Species') :: ['Pisum sativum', 'pea']
@entity30861 :: (CHEBI:68487,Chemical) :: ['Strigolactone']
