Potassium (K+) Starvation-Induced Oxidative Stress Triggers a General Boost of Antioxidant and NADPH-Generating Systems in the Halophyte Cakile maritima.
Antioxidants (Basel). 2022 Feb 16; 11(2)A

Abstract

Potassium (K+) is an essential macro-element for plant growth and development given its implication in major processes such as photosynthesis, osmoregulation, protein synthesis, and enzyme function. Using 30-day-old Cakile maritima plants as halophyte model grown under K+ deprivation for 15 days, it was analyzed at the biochemical level to determine the metabolism of reactive oxygen species (ROS), key photorespiratory enzymes, and the main NADPH-generating systems. K+ starvation-induced oxidative stress was noticed by high malondialdehyde (MDA) content associated with an increase of superoxide radical (O2•-) in leaves from K+-deficient plants. K+ shortage led to an overall increase in the activity of hydroxypyruvate reductase (HPR) and glycolate oxidase (GOX), as well as of antioxidant enzymes catalase (CAT), those of the ascorbate-glutathione cycle, peroxidase (POX), and superoxide dismutase (SOD), and the main enzymes involved in the NADPH generation in both leaves and roots. Especially remarkable was the induction of up to seven CuZn-SOD isozymes in leaves due to K+ deficiency. As a whole, data show that the K+ starvation has associated oxidative stress that boosts a biochemical response leading to a general increase of the antioxidant and NADPH-generating systems that allow the survival of the halophyte Cakile maritima.

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Authors+Show Affiliations

Houmani H

Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, CSIC, Apartado 419, E-18080 Granada, Spain. Laboratory of Extremophile Plants, Center of Biotechnology of Borj Cedria, P.O. Box 901, Hammam-Lif 2050, Tunisia.

Debez A

Laboratory of Extremophile Plants, Center of Biotechnology of Borj Cedria, P.O. Box 901, Hammam-Lif 2050, Tunisia.

Freitas-Silva L

Abdelly C

Laboratory of Extremophile Plants, Center of Biotechnology of Borj Cedria, P.O. Box 901, Hammam-Lif 2050, Tunisia.

Palma JM

Corpas FJ

Pub Type(s)

Journal Article

Language

eng

PubMed ID

35204284

Citation

Houmani, Hayet, et al. "Potassium (K+) Starvation-Induced Oxidative Stress Triggers a General Boost of Antioxidant and NADPH-Generating Systems in the Halophyte Cakile Maritima." Antioxidants (Basel, Switzerland), vol. 11, no. 2, 2022.

Houmani H, Debez A, Freitas-Silva L, et al. Potassium (K+) Starvation-Induced Oxidative Stress Triggers a General Boost of Antioxidant and NADPH-Generating Systems in the Halophyte Cakile maritima. Antioxidants (Basel). 2022;11(2).

Houmani, H., Debez, A., Freitas-Silva, L., Abdelly, C., Palma, J. M., & Corpas, F. J. (2022). Potassium (K+) Starvation-Induced Oxidative Stress Triggers a General Boost of Antioxidant and NADPH-Generating Systems in the Halophyte Cakile maritima. Antioxidants (Basel, Switzerland), 11(2). https://doi.org/10.3390/antiox11020401

Houmani H, et al. Potassium (K+) Starvation-Induced Oxidative Stress Triggers a General Boost of Antioxidant and NADPH-Generating Systems in the Halophyte Cakile Maritima. Antioxidants (Basel). 2022 Feb 16;11(2) PubMed PMID: 35204284.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Potassium (K+) Starvation-Induced Oxidative Stress Triggers a General Boost of Antioxidant and NADPH-Generating Systems in the Halophyte Cakile maritima. AU - Houmani,Hayet, AU - Debez,Ahmed, AU - Freitas-Silva,Larisse de, AU - Abdelly,Chedly, AU - Palma,José M, AU - Corpas,Francisco J, Y1 - 2022/02/16/ PY - 2022/01/11/received PY - 2022/02/11/revised PY - 2022/02/14/accepted PY - 2022/2/25/entrez PY - 2022/2/26/pubmed PY - 2022/2/26/medline KW - Cakile maritima KW - CuZn-SOD isozymes KW - NADP-isocitrate dehydrogenase KW - ascorbate peroxidase KW - catalase KW - halophyte KW - oxidative stress KW - pentose phosphate pathway KW - potassium deficiency JF - Antioxidants (Basel, Switzerland) JO - Antioxidants (Basel) VL - 11 IS - 2 N2 - Potassium (K+) is an essential macro-element for plant growth and development given its implication in major processes such as photosynthesis, osmoregulation, protein synthesis, and enzyme function. Using 30-day-old Cakile maritima plants as halophyte model grown under K+ deprivation for 15 days, it was analyzed at the biochemical level to determine the metabolism of reactive oxygen species (ROS), key photorespiratory enzymes, and the main NADPH-generating systems. K+ starvation-induced oxidative stress was noticed by high malondialdehyde (MDA) content associated with an increase of superoxide radical (O2•-) in leaves from K+-deficient plants. K+ shortage led to an overall increase in the activity of hydroxypyruvate reductase (HPR) and glycolate oxidase (GOX), as well as of antioxidant enzymes catalase (CAT), those of the ascorbate-glutathione cycle, peroxidase (POX), and superoxide dismutase (SOD), and the main enzymes involved in the NADPH generation in both leaves and roots. Especially remarkable was the induction of up to seven CuZn-SOD isozymes in leaves due to K+ deficiency. As a whole, data show that the K+ starvation has associated oxidative stress that boosts a biochemical response leading to a general increase of the antioxidant and NADPH-generating systems that allow the survival of the halophyte Cakile maritima. SN - 2076-3921 UR - https://www.unboundmedicine.com/medline/citation/35204284/Potassium__K+__Starvation_Induced_Oxidative_Stress_Triggers_a_General_Boost_of_Antioxidant_and_NADPH_Generating_Systems_in_the_Halophyte_Cakile_maritima_ DB - PRIME DP - Unbound Medicine ER -

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Potassium (K+) Starvation-Induced Oxidative Stress Triggers a General Boost of Antioxidant and NADPH-Generating Systems in the Halophyte Cakile maritima.Antioxidants (Basel). 2022 Feb 16; 11(2)A