Table 1. Growth physiology of Synechococcus strains grown at 18 °C and 22 °C.

Clade	Strains	Average growth rate±s.d.
I	CC9311 18 °C	0.48±0.016*
	CC9311 22 °C	0.52±0.008
	WH8016 18 °C	0.30±0.009****
	WH8016 22 °C	0.48±0.004
II	WH8109 18 °C	0.18±0.009****
	WH8109 22 °C	0.40±0.011
	CC9605 18 °C	n/aa
	CC9605 22 °C	0.33±0.014
III	WH8102 18 °C	0.16±0.013****
	WH8102 22 °C	0.47±0.018
IV	BL107 18 °C	0.36±0.003***
	BL107 22 °C	0.48±0.011
	CC9902 18 °C	0.42±0.004***
	CC9902 22 °C	0.49±0.008

*P<0.05, ***P<0.001, ****P<0.0001.

^aGrowth rates for strain CC9605 were not calculated since it did not grow beyond three generations after transfer to 18 °C.