Table 1.

The response of Rubisco activation in cotton and tobacco to leaf temperature, Ci, and O₂ concentration

Species	Ci, μbar	O2, mbar	Rubisco activation, % ± SE
			28°C	37°C
Cotton	280	210	91  ± 2	74  ± 4
	280	10	77  ± 1	62  ± 6
	700	210	ND	62  ± 2
	700	10	ND	50  ± 3
	1,200	210	47  ± 2	49  ± 4
	1,200	10	ND	39  ± 3
Tobacco	280	210	92  ± 2	77  ± 1
	280	10	66  ± 5	53  ± 5
	950	210	65  ± 6	59  ± 2
	950	10	ND	39  ± 7

ND, not determined.