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Article

Using the Maize Nested Association Mapping (NAM) Population to Partition Arbuscular Mycorrhizal Effects on Drought Stress Tolerance into Hormonal and Hydraulic Components

by
Juan Manuel Ruiz-Lozano
1,*,
Gabriela Quiroga
1,2,
Gorka Erice
1,3,
Jacob Pérez-Tienda
1,
Ángel María Zamarreño
4,
José María García-Mina
4 and
Ricardo Aroca
1
1
Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín (CSIC), Profesor Albareda Nº 1, 18008 Granada, Spain
2
Misión Biológica de Galicia (MBG-CSIC), Apartado de correos 28, 36080 Pontevedra, Spain
3
ATENS—Agrotecnologías Naturales S.L., Ctra.T-214, s/n, Km 4, La Riera de Gaia, 43762 Tarragona, Spain
4
Departmento de Biología Ambiental, Facultad de Ciencias, Universidad de Navarra, Irunlarrea No 1, 31008 Pamplona, Spain
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2022, 23(17), 9822; https://doi.org/10.3390/ijms23179822
Submission received: 6 July 2022 / Revised: 19 August 2022 / Accepted: 25 August 2022 / Published: 29 August 2022
(This article belongs to the Special Issue New Advances in Plant Abiotic Stress)
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Abstract

In this study, a first experiment was conducted with the objective of determining how drought stress alters the radial water flow and physiology in the whole maize nested association mapping (NAM) population and to find out which contrasting maize lines should be tested in a second experiment for their responses to drought in combination with an arbuscular mycorrhizal (AM) fungus. Emphasis was placed on determining the role of plant aquaporins and phytohormones in the responses of these contrasting maize lines to cope with drought stress. Results showed that both plant aquaporins and hormones are altered by the AM symbiosis and are highly involved in the physiological responses of maize plants to drought stress. The regulation by the AM symbiosis of aquaporins involved in water transport across cell membranes alters radial water transport in host plants. Hormones such as IAA, SA, ABA and jasmonates must be involved in this process either by regulating the own plant-AM fungus interaction and the activity of aquaporins, or by inducing posttranscriptional changes in these aquaporins, which in turns alter their water transport capacity. An intricate relationship between root hydraulic conductivity, aquaporins and phytohormones has been observed, revealing a complex network controlling water transport in maize roots.
Keywords: aquaporin; arbuscular mycorrhiza; drought; maize; phytohormone; root hydraulic conductivity aquaporin; arbuscular mycorrhiza; drought; maize; phytohormone; root hydraulic conductivity

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MDPI and ACS Style

Ruiz-Lozano, J.M.; Quiroga, G.; Erice, G.; Pérez-Tienda, J.; Zamarreño, Á.M.; García-Mina, J.M.; Aroca, R. Using the Maize Nested Association Mapping (NAM) Population to Partition Arbuscular Mycorrhizal Effects on Drought Stress Tolerance into Hormonal and Hydraulic Components. Int. J. Mol. Sci. 2022, 23, 9822. https://doi.org/10.3390/ijms23179822

AMA Style

Ruiz-Lozano JM, Quiroga G, Erice G, Pérez-Tienda J, Zamarreño ÁM, García-Mina JM, Aroca R. Using the Maize Nested Association Mapping (NAM) Population to Partition Arbuscular Mycorrhizal Effects on Drought Stress Tolerance into Hormonal and Hydraulic Components. International Journal of Molecular Sciences. 2022; 23(17):9822. https://doi.org/10.3390/ijms23179822

Chicago/Turabian Style

Ruiz-Lozano, Juan Manuel, Gabriela Quiroga, Gorka Erice, Jacob Pérez-Tienda, Ángel María Zamarreño, José María García-Mina, and Ricardo Aroca. 2022. "Using the Maize Nested Association Mapping (NAM) Population to Partition Arbuscular Mycorrhizal Effects on Drought Stress Tolerance into Hormonal and Hydraulic Components" International Journal of Molecular Sciences 23, no. 17: 9822. https://doi.org/10.3390/ijms23179822

APA Style

Ruiz-Lozano, J. M., Quiroga, G., Erice, G., Pérez-Tienda, J., Zamarreño, Á. M., García-Mina, J. M., & Aroca, R. (2022). Using the Maize Nested Association Mapping (NAM) Population to Partition Arbuscular Mycorrhizal Effects on Drought Stress Tolerance into Hormonal and Hydraulic Components. International Journal of Molecular Sciences, 23(17), 9822. https://doi.org/10.3390/ijms23179822

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