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Interaction Between Silicon and Arbuscular Mycorrhizal Symbiosis: an Ecologically Sustainable Tool to Improve Crop Fitness Under a Drought Scenario?

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Abstract

Drought is projected to be one of the major constraints for crop production worldwide under the current climate change scenario. In this context, the improvement of yield and healthy attributes of crops that constitute the basis of human nutrition is a paramount challenge. The development of eco-friendly strategies for agricultural management of crops based on the combined use of nontoxic pollution-free fertilizers and symbiotic interactions at the soil–plant system level could be envisaged as a strategic tool to sustain the production of high-quality grains and thus satisfy the food demand of an increasing human population. A wide range of benefits of silicon (Si) on primary and secondary metabolism have been reported under water deficit stress. Moreover, current evidence suggests that the benefits derived from Si acquisition on drought-stressed plants can be enhanced by the occurrence of arbuscular mycorrhizal (AM) symbiosis. Thus, the combined use of sustainable tools such as Si fertilization and arbuscular mycorrhizal fungi (AMF) could be suggested as a promising strategy to overcome the negative effects produced by water deficiency–related stress. Nevertheless, the physiological, biochemical, and molecular mechanisms underlying this synergistic action remain poorly understood. This review explores recent research on the benefits of the joint action of Si-AMF on crop production under drought conditions. We also discuss the potential role of Si-AMF interactions on plant performance under water deficit stress.

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Abbreviations

AMF:

Arbuscular mycorrhizal fungi

APX:

Ascorbate peroxidase

As:

Arsenic

Ca:

Calcium

CAT:

Catalase

Cd:

Cadmium

Cu:

Copper

DHAR:

Dehydroascorbate reductase

Fe:

Iron

GDH:

Glutamate dehydrogenase

GP:

Guaiacol peroxidase

GR:

Glutathione reductase

H2O:

Water

H2O2 :

Hydrogen peroxide

H4SiO4 :

Silicic acid

K:

Potassium

K2SiO3 :

Potassium silicate

MDAR:

Monodehydroascorbate reductase

Mg:

Magnesium

N:

Nitrogen

Na:

Sodium

Na2SiO3 :

Sodium silicate

NIPs:

Nodulin26-like intrinsic proteins

P:

Phosphorus

P5CS:

Pyrroline-5-carboxylate synthetase

PGPB:

Plant growth–promoting bacteria

PIPs:

Plasma membrane intrinsic proteins

POD:

Peroxidase

PPO:

Polyphenol oxidase

ROS:

Reactive oxygen species

RWC:

Relative water content

Si:

Silicon

SOD:

Superoxide dismutase

TIPs:

Tonoplast intrinsic proteins

Zn:

Zinc

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Funding

This work was supported by the FONDECYT Regular Project No 1201257 and the FONDECYT Postdoctoral Project No 3200901 of the Agencia Nacional de Investigación y Desarrollo (ANID), Chile. Research fellowship granted by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) to A.N.N is also gratefully acknowledged.

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Correspondence to Paula Cartes.

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The authors declare no competing interests.

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Vega, I., Pontigo, S., Nunes-Nesi, A. et al. Interaction Between Silicon and Arbuscular Mycorrhizal Symbiosis: an Ecologically Sustainable Tool to Improve Crop Fitness Under a Drought Scenario?. J Soil Sci Plant Nutr 23, 125–138 (2023). https://doi.org/10.1007/s42729-021-00701-y

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  • DOI: https://doi.org/10.1007/s42729-021-00701-y

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