Effect of Arbuscular Mycorrhizal Colonization on Cadmium‐Mediated Oxidative Stress in Glycine max (L.) Merr.

LUGO M. A.-MOLINA ALICIA; PÉREZ CHACA M. V. ; VARGAS GIL, S.; ZIRULNIK, F.; LEPORATI, J. ; FERROL, N.; AZCÓN-AUILAR, C.

Plants

MDPI

Lugar: Basel; Año: 2020 vol. 9 p. 1 - 17

2223-7747

Cadmium is a heavy metal (HM) that inhibits plant growth and leads to death, causinggreat losses in yields, especially in Cd hyperaccumulator crops such as Glycine max (L.) Merr.(soybean), a worldwide economically important legume. Furthermore, Cd incorporation into thefood chain is a health hazard. Oxidative stress (OS) is a plant response to abiotic and biotic stresseswith an intracellular burst of reactive oxygen species (ROS) that causes damage to lipids, proteins,and DNA. The arbuscular mycorrhizal fungal (AMF) association is a plant strategy to cope with HMand to alleviate OS. Our aim was to evaluate the mitigation effects of mycorrhization with AMFRhizophagus intraradices on soybean growth, nutrients, Cd accumulation, lipid peroxidation, and theactivity of different antioxidant agents under Cd (0.7?1.2 mg kg−1 bioavailable Cd) induced OS. Ourresults suggest that glutathione may act as a signal molecule in a defense response to Cd‐inducedOS, and mycorrhization may avoid Cd‐induced growth inhibition and reduce Cd accumulation inroots. It is discussed that R. intraradices mycorrhization would act as a signal, promoting thegeneration of a soybean cross tolerance response to Cd pollution, therefore evidencing the potentialof this AMF association for bioremediation and encouragement of crop development, particularlybecause it is an interaction between a worldwide cultivated Cd hyperaccumulator plant and anAMF?HM?accumulator commonly present in soils.