Table II.

Rate constants of degradation of D1 and D2 PSII proteins in wild-type and mutant Arabidopsis plants exposed to low and high UV-B radiation

Ecotype	Rate Constants of Protein Degradation
	Low UV-Ba				High UV-B
	D1	s.e.b	D2	s.e.	D1	s.e.	D2	s.e.
	h−1
Columbia WT	0.17	0.03	0.03	0.01	0.20	0.04	0.09	0.02
Col. fah1	0.17	0.03	0.07	0.01	0.28	0.07	0.11	0.02
Col. tt4-2YY6	0.21	0.03	0.17	0.05	0.25	0.05	0.23	0.08
Landsberg erecta	0.13	0.02	0.08	0.01	0.20	0.03	0.12	0.07
Ler. tt4-W85	0.19	0.02	0.07	0.01	0.26	0.07	0.12	0.01
Ler. tt5	0.16	0.04	0.12	0.01	0.32	0.10	0.24	0.08

^a Low UV-B represents 0.62 μmol m⁻² s⁻¹ and high UV-B represents 1.24 μmol m⁻² s⁻¹. 

^b s.e., Standard error (n = 3–8).