TABLE 4.

Growth rates of group II, III, and IV Synechococcus clones and inferred sister taxa at different temperatures

Temp (°C)	Growth rates (no. of doublings day−1)a
	Group II clones			Group III clone	Group IV clones				Sister taxa
	OH4	OH20	Pool	OH2	OH28	OH29	OH30	Pool	SH-94-5	C9
30	NDb	ND	ND	ND	ND	ND	ND	ND	0.37 ± 0.020	0.20 ± 0.020
35	0	0	0	ND	ND	ND	ND	ND	0.57 ± 0.008	0.60 ± 0.020
40	0.42 ± 0.064	0.67 ± 0.040	0.55 ± 0.078	0	ND	ND	ND	ND	1.20 ± 0.016	0.94 ± 0.064
45	0.83 ± 0.159	0.94 ± 0.108	0.88 ± 0.084	0.74 ± 0.012	ND	ND	ND	ND	1.08 ± 0.359	1.43 ± 0.303
50	ND	ND	ND	ND	0	0	0	0	ND	ND
55	1.11 ± 0.124	1.09 ± 0.028	1.10 ± 0.052	1.36 ± 0.175	0.26 ± 0.040	0.45 ± 0.016	0.36 ± 0.096	0.36 ± 0.045	1.05 ± 0.108	0.91 ± 0.088
57	1.73 ± 0.207	1.57 ± 0.052	1.65 ± 0.099	1.60 ± 0.028	ND	ND	ND	ND	0	0
61	0.99 ± 0.195	0.81 ± 0.231	0.90 ± 0.134	1.36 ± 0.012	0.63 ± 0.016	0.55 ± 0.060	0.41 ± 0.080	0.53 ± 0.045	ND	ND
63	0	0	0	0.93 ± 0.056	ND	ND	ND	ND	ND	ND
65	ND	ND	ND	0	0.64 ± 0.028	0.74 ± 0.072	0.77 ± 0.020	0.72 ± 0.032	ND	ND
70	ND	ND	ND	ND	0.69 ± 0.060	0.54 ± 0.179	0.69 ± 0.040	0.64 ± 0.059	ND	ND
73	ND	ND	ND	ND	0	0	0	0	ND	ND

^aMean ± standard error. 

^bND, not determined.