Table I.

Distribution of incorporated ¹⁴C following assimilation of ¹⁴CO₂

	HL		LL
	Ws-2	ape2	Ws-2	ape2
Soluble	61.6 ± 1.9	59.5 ± 1.5	54.3 ± 1.0	47.9 ± 1.3a
Neutral sugars	32.2 ± 1.6	22.2 ± 0.8a	18.6 ± 0.9	10.9 ± 0.2a
Fructose	2.2 ± 0.2	0.8 ± 0.0a	0.9 ± 0.0	0.3 ± 0.0a
Glucose	4.6 ± 0.3	3.2 ± 0.4b	2.2 ± 0.1	1.2 ± 0.0a
Sucrose	24.9 ± 1.2	17.8 ± 0.7a	15.3 ± 0.8	9.1 ± 0.3a
Other	0.6 ± 0.1	0.5 ± 0.1	0.2 ± 0.0	0.3 ± 0.1
Amino acids	17.2 ± 2.0	23.9 ± 1.5b	21.6 ± 0.9	23.5 ± 0.8
Organic acids	10.5 ± 1.3	10.9 ± 0.5	12.0 ± 0.5	11.4 ± 0.6
Phosphoesters	1.6 ± 0.2	2.5 ± 0.5	2.2 ± 0.1	2.0 ± 0.2
Insoluble	38.4 ± 1.9	40.5 ± 1.5	45.7 ± 1.0	52.1 ± 1.3a
Starch	30.3 ± 2.1	31.9 ± 1.3	35.2 ± 1.2	41.7 ± 1.3a
Protein	3.1 ± 0.2	3.5 ± 0.1	4.0 ± 0.3	4.2 ± 0.2
Cell wall	5.1 ± 0.3	5.1 ± 0.3	6.5 ± 0.3	6.2 ± 0.3

For each growth condition, six wild-type and six ape2 plants were placed side by side in a sealed glass container in which was released 500 μL L^{−1 14}CO₂. After 15 min photosynthesis under growth light conditions, the chamber was flushed through with air and metabolism was quenched by immediately freezing leaf tissue in ethanol. The distribution of ¹⁴C between metabolite fractions was determined. The data for each fraction are expressed as a percentage of total recovered label (mean ± se, n = 6). The recovery of label following fractionation averaged 97%.

^aSignificant difference from the corresponding wild type, P < 0.005.

^bSignificant difference from the corresponding wild type, P < 0.05.