Sulfate Nutrition Modulates the Oxidative Response against Short-Term Al 3+ -Toxicity Stress in Lolium perenne cv. Jumbo Shoot Tissues

Hernan Vera-Villalobos, Lizzeth Lunario-Delgado, Anita S. Gálvez, Domingo Román-Silva, Ana Mercado-Seguel and Cristián Wulff-Zottele ()
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Hernan Vera-Villalobos: Centro de Bioinnovación Antofagasta (CBIA), Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Antofagasta 1240000, Chile
Lizzeth Lunario-Delgado: Programa de Magister en Biotecnología, Departamento de Biotecnología, Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Antofagasta 1240000, Chile
Anita S. Gálvez: Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta 1240000, Chile
Domingo Román-Silva: Departamento de Química, Universidad de Antofagasta, Antofagasta 1240000, Chile
Ana Mercado-Seguel: Departamento de Biotecnología, Universidad de Antofagasta, Antofagasta 1240000, Chile
Cristián Wulff-Zottele: Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta 1240000, Chile

Agriculture, 2024, vol. 14, issue 9, 1-18

Abstract: Al 3+ -toxicity in acidic soils is among the main abiotic stress factors that generate adverse effects in plant growth; in leaves, it affects several physiological parameters such as photosynthesis and ROS balance, leading to limited crop production. On the other hand, sulfur is a macronutrient that has a key role against oxidative stress and improves plant growth in acidic soils; however, the implication of sulfate nutritional status in the modulation of short-term Al 3+ -toxicity tolerance mechanisms in plant leaves are barely reported. This study is focused on the role of sulfate on the leaf response of an Al 3 -sensitive perennial ryegrass ( Lolium perenne cv. Jumbo ) after 48 h of exposure. Lolium perenne cv. Jumbo seeds were cultivated in hydroponic conditions with modified Taylor Foy solutions supplemented with 120, 240, and 360 μM sulfate in the presence or absence of Al 3+ -toxicity. The L. perenne cv. Jumbo leaves were collected after 48 h of Al 3+ -toxicity exposure and processed to evaluate the effects of sulfate on Al 3+ toxicity, measuring total proteins, mineral uptake, photosynthesis modulation, and ROS defense mechanism activation. The plants exposed to Al 3+ -toxicity and cultivated with a 240 µM sulfate amendment showed a recovery of total proteins and Ca 2+ and Mg 2+ concentration levels and a reduction in TBARS, along with no changes in the chlorophyll A/B ratio, gene expression of proteins related to photosynthesis (Rubisco, ChlAbp, and Fered), or ROS defense mechanism (SOD, APX, GR, and CAT) as compared with their respective controls and the other sulfate conditions (120 and 360 µM). The present study demonstrates that adequate sulfate amendments have a key role in regulating the physiological response against the stress caused by Al 3+ toxicity.

Keywords: aluminum; Al 3+ -toxicity; sulfate; oxidative stress; antioxidant response (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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