Abstract

ALAYA, Bernabé Salomón Luis et al. Proline content in Zea mays L. var. canteño (Poaceae) treated with Rhizophagus irregularis and NaCl. Arnaldoa [online]. 2021, vol.28, n.3, pp.693-716.  Epub Dec 31, 2021. ISSN 1815-8242.  http://dx.doi.org/10.22497/arnaldoa.283.28313.

Soil salinity is a serious problem that affects Zea mays L. (Poaceae) productivity. The objective of this research was to quantify proline in roots and leaves of Z. mays L. var. canteño treated with Rhizophagus irregularis and 0, 25, 50 and 100 mM NaCl. 7-day-old plantlets of Z. mays L. var. canteño were sown in a mixture of sand and moss and then inoculated with R. irregularis. The plants were watered to field capacity with the saline solutions for 60 days. Then, the leaf and root proline contents and mycorrhization percentage were determined. Significant differences were found in leaf and roots proline levels in purple corn. In roots, the proline content increased with NaCl concentration without significant differences in regards to R. irregularis inoculation. In leaves, proline was induced by NaCl, while the inoculation with R. irregularis decreased the proline levels in NaCl concentration of 25, 50 y 100mM. In conclusion, the amount of leaf and root proline in Z. mays L. var. canteño showed significant changes in plants inoculated with R. irregularis and treated with 0, 25, 50 and 100 mM NaCl.

Keywords : Rhizophagus irregularis; Zea mays L. var. canteño; purple corn; proline; mycorrhization.

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