The New Discovery of Plant Haemoglobins?Function ——Modulation of Nitric Oxide Bioactivity

Abstract: Haemoglobins exist widely in the plant kingdom， whose functions have been studied thoroughly. Recently， evidences have accumulated to indicate that besides the physiological functions in carrying O₂ and sensoring O₂， a new role of plant haenoglobins can carry out by modulating the bioactivity of nitric oxide. This review discusses the function of plant haemoglobins in relation to regulate the nitric oxide level under plant growth and stress， emphasizes the functions and mechanisms of plant haemoglobins involve in NO detoxification， regeneration of NAD(P)⁺， maintenance of energy status. This discovery of plant haemoglobins?new role provides important meaning to research the regulation mechanism of NO signal transduction.

CSTR: 32200.14.cjcb.2007.04.0012