Arabidopsis root system responds to phosphorus (P) deficiency by decreasing primary root
elongation and developing abundant lateral roots. Feeding plants with ascorbic acid (ASC)
stimulated primary root elongation in seedlings grown under limiting P concentration.
However, at high P, ASC inhibited root growth. Seedlings of ascorbate‐deficient mutant
(vtc1) formed short roots irrespective of P availability. P‐starved plants accumulated less
ascorbate in primary root tips than those grown under high P. ASC‐treatment stimulated cell …