Action Mechanisms of Plant Growth Promoting Cyanobacteria in Crops In Situ: A Systematic Review of Literature

Table 3

Cyanobacterial genera classified according to their PGPR action mechanisms o PGP characteristics

Mechanism	Cyanobacterial genera	References
N2 fixation	Nostoc sp., Anabaena sp., Cylindrospermum sp., Phormidium sp., Oscillatoria sp.	[4, 18, 19, 29–38, 44, 45].
Phosphate solubilization	Anabaena sp., Calothrix sp., Nostoc sp., Oscillatoria sp., Phormidium sp.	[18, 20, 29, 31, 33–35, 37, 38, 42, 45].
Phytohormone production	Anabaena sp., Calothrix sp., Nostoc sp., Phormidium sp., Hapalosiphon sp., Aulosira sp., Tolypothrix sp., Oscillatoria sp., Plectonema sp.	[18–20, 25, 29, 33, 40, 42].
Bioactive compound excretion	Anabaena sp., Calothrix sp., Nostoc sp., Phormidium sp., Hapalosiphon sp., Aulosira sp., Tolypothrix sp., Oscillatoria sp., and Plectonema sp.	[20, 29, 31, 33, 39, 40, 43, 45].
Symbiotic associations	Nostoc sp., Anabaena sp., Cylindrospermum sp., Phormidium sp., Synechococcus sp.,Chlorogloeopsis sp., Spirulina sp.	[4, 18, 37, 41]

Source: own elaboration