Nitric Oxide, frataxin and ferritins: a good team against oxidative stress

RAMIREZ, L.; SIMONTACCHI MS; MURGIA I; EDUARDO JULIAN ZABALETA; LAMATTINA, L.

PLANT SCIENCE

ELSEVIER IRELAND LTD

Año: 2011 vol. 181 p. 582 - 592

0168-9452

Iron is a key element in plant nutrition. Iron deficiency as well iron overload result in seriousmetabolic disorders that affect photosynthesis, respiration and general plant fitness with directconsequences on crop production.More than 25% of the cultivable land possesses low iron availability due to high pH (calcareous soils).Plant biologists are challenged by this concern and aimed to find new avenues to ameliorate plantresponses and keep iron homeostasis under control even at wide range of iron availability in varioussoils. For this purpose, detailed knowledge of iron uptake, transport, storage and interactions withcellular compounds will help to construct a more complete picture of its role as essential nutrient. Inthis review we summarize and describe the recent findings involving four central players involved inkeeping cellular iron homeostasis in plants: nitric oxide, ferritin, frataxin and nitrosyl iron complexes.We attempt to highlight the interactions among these actors in the different scenarios occurring underiron deficiency or iron overload, and discuss their counteracting and/or coordinating actions leading tothe control of iron homeostasis.