Table 1. Annotated small heat shock genes in selected cyanobacteria from various habitats.

Species	Order	Habitat	Morphology	Number of small heat shock genes
Synechocystis sp PCC 6803	Chroococcales	Fresh water, mesophilic	unicellular	1 (hsp17)
Thermosynechococcus elongatus BP-1	Chroococcales	Fresh water, thermophilic	unicellular	1 (hspA)
Synechococcus elongatus PCC 7942	Chroococcales	Marine, mesophilic	unicellular	1 (Synpcc7942_2401)
Nostoc azollae 0708	Nostocales	Plant symbiont, mesophilic	filamentous	1 (Aazo_2049)
Gloeobacter violaceus PCC 7421	Gloeobacterales	Terrestrial, mesophilic	unicellular	1 (glr2703)
Nostoc sp PCC 7120	Nostocales	Aquatic, mesophilic	filamentous	2 (alr0286, alr1809)
Cyanothece sp. PCC 7424	Chroococcales	Terrestrial, mesophilic	unicellular	2 (PCC7424_3788, PCC7424_4819)
Microcystis aeruginosa NIES-843	Chroococcales	Fresh water, mesophilic	Colonial or unicellular	2 (MAE_11440, MAE_45710)
Synechococcus sp JA-3–3Ab	Chroococcales	marine, thermophilic	unicellular	2 (CYA_1442, CYA_1888)
Anabaena variabilis ATCC 29413	Nostocales	Aquatic, mesophilic	filamentous	3 (ava3076, ava4812, avaC0143)
Trichodesmium erythraeum IMS101	Oscillatoriales	Marine, mesophilic	filamentous	4 (Tery_3061, Tery_3062,Tery_3063, Tery_3064)
Acaryochloris marina MBIC11017	Chroococcales	Marine, coral symbiont mesophilic	unicellular	4 (AM1_1464, AM1_2993, AM1_D0093, AM1_D0147)
Nostoc punctiforme PCC 73102	Nostocales	Diverse, mesophilic	filamentous	6 (Npun_F0198, Npun_F0784, Npun_F1627, Npun_R1930, Npun_F2984, Npun_F3131)