. 1999 Apr;119(4):1349–1360. doi: 10.1104/pp.119.4.1349

Table II.

Labeling of amino acids by ³H supplied as Pro in apical and basal sections of the root tip at high (−0.02 MPa) or low (−1.6 MPa) ψ_w.

Amino Acid	High ψ_w				Low ψ_w
Amino Acid	Apical		Basal		Apical		Basal
	dpm RS⁻¹	dpm nmol⁻¹	dpm RS⁻¹	dpm nmol⁻¹	dpm RS⁻¹	dpm nmol⁻¹	dpm RS⁻¹	dpm nmol⁻¹
Asp	130	72	136	165	193	79	129	48
Asn	107	157	325	60	260	76	276	16
Ser	43	64	86	68	107	46	94	13
Gln	278	16	397	14	595	22	213	6
Arg	101	412	312	745	1324	5247	819	1942
GABA	320	313	1972	1258	696	138	1314	993
Thr	106	184	571	144	257	144	380	71
Ala	823	302	550	35	1486	174	1420	49

Apical and basal sections were harvested after 120 min of labeling, as shown in Figure 1. Data are means of two samples from two experiments. RS, Root section.