Non-symbiotic haemoglobins—What’s happening beyond nitric oxide scavenging?

Abstract. Background and aims: Non-symbiotic haemoglobins have been an active research topic for over 30 years, during which time a considerable portfolio of knowledge has accumulated relative to their chemical and molecular properties, and their presence and mode of induction in plants. While progress has been made towards understanding their physiological role, there remain a number of …