Table I.

Percent label remaining as ascorbic acid in application leaf and sinks

	Hours
	6	12	6	12	6	12
M. sativa	Leaf		Shoot		Root
AsA	74	79	70	66	59	68
Pre-AsA	2	1	4	7	13	7
Post-AsA	24	20	26	27	28	25
Arabidopsis	Leaf		Flowers		Siliques
AsA	76	74	35	51	45	59
Pre-AsA	4	2	33	20	25	14
Post-AsA	20	24	32	29	30	27

l-[¹⁴C]AsA was applied to a source leaf of an intact plant and application leaf, shoot tips, and roots were analyzed by HPLC and scintillation counting for percent of label present as AsA and as a pre- or post-AsA fraction. The data indicate AsA is transported intact but is metabolized to various degrees in sink tissues, especially in Arabidopsis.