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KI Increases Tomato Fruit Quality and Water Deficit Tolerance by Improving Antioxidant Enzyme Activity and Amino Acid Accumulation: A Priming Effect or Relief during Stress?

Authors :
Jucelino de Sousa Lima
Otávio Vitor Souza Andrade
Everton Geraldo de Morais
Gilson Gustavo Lucinda Machado
Leônidas Canuto dos Santos
Eduarda Santos de Andrade
Pedro Antônio Namorato Benevenute
Gabryel Silva Martins
Vitor L. Nascimento
Paulo Eduardo Ribeiro Marchiori
Guilherme Lopes
Eduardo Valério de Barros Vilas Boas
Luiz Roberto Guimarães Guilherme
Source :
Plants, Vol 12, Iss 23, p 4023 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

A water deficit can negatively impact fruit yield and quality, affecting critical physiological processes. Strategies to mitigate water deficits are crucial to global food security. Iodine (I) may increase the efficiency of the antioxidant system of plants, but its role against water deficits is poorly understood. This study aimed to evaluate the effectiveness of I in attenuating water deficits and improving fruit quality, investigating whether metabolic responses are derived from a “priming effect” or stress relief during water deficits. Tomato plants were exposed to different concentrations of potassium iodide (KI) via a nutrient solution and subjected to a water deficit. A water deficit in tomatoes without KI reduced their yield by 98%. However, a concentration of 100 μM of KI increased the yield under a water deficit by 28%. This condition is correlated with increased antioxidant activity, photosynthetic efficiency improvement, and malondialdehyde reduction. In addition, the concentration of 100 μM of KI promoted better fruit quality through antioxidant capacity and a decline in the maturation index. Therefore, KI can be an alternative for attenuating water deficits in tomatoes, inducing positive responses during the water deficit period while at the same time improving fruit quality.

Details

Language :
English
ISSN :
22237747
Volume :
12
Issue :
23
Database :
Directory of Open Access Journals
Journal :
Plants
Publication Type :
Academic Journal
Accession number :
edsdoj.4c65b82d57c748b697e5b87d60b556da
Document Type :
article
Full Text :
https://doi.org/10.3390/plants12234023