Capsule of main finding
This is the first study that demonstrates, NO plays key role in SA-induced Ca2+-mediated signaling in Ni2+-stressed Anabaena sp. PCC 7120 by regulating photosynthesis, nitrogen metabolism status and antioxidant system.
Keywords: Calcium; Nickel; Nitric oxide; Nitrogen metabolism status; PSII photochemistry; Salicylic acid.