Different plasticity of bud outgrowth at cauline and rosette nodes in Arabidopsis thaliana

We addressed this question by phenotyping cauline and rosette branching in three arabidopsis ecotypes and several arabidopsis mutants with varied shoot architectures



Scholarcy highlights

  • Shoot architecture is a highly plastic trait of plants, providing them with enormous flexibility to adapt to their environment and be successful when growing in competition with other plants
  • These included wild type and mutant plants grown in long photoperiods at normal and high planting density
  • We used the Pearson correlation coefficient of all data available for mutants in the Col-0 background and Col-0 wild-type plants with the following variables: days to bolting, cauline leaf number, rosette leaf number, cauline branches, rosette branches, total branches, and R1 divided by RL
  • Principal component analysis was performed based on the averages of all variables for mutants in the Col-0 background and Col-0 wild-type plants grown in long-day conditions
  • This explains the positive correlation of R1 and C1 as well as of RL and R1 in mutants that branch at their maximum capacity where the limiting factor of branching is the number of nodes produced
  • Cauline branching is highly correlated to the number of cauline nodes produced, which in turn is related, to a large extent, to flowering time
  • This is in stark contrast to rosette branching which correlated only weakly with rosette leaf number when long-day grown ecotypes were analysed separately

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