VAITKEVIČIŪTĖ, Gabija; ALELIŪNAS, Andrius; GIBON, Yves; ARMONIENĖ, Rita

doi:10.3390/plants11212818

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VAITKEVIČIŪTĖ, Gabija
Lithuanian Research Centre for Agriculture and Forestry [LAMMC]

ALELIŪNAS, Andrius
Lithuanian Research Centre for Agriculture and Forestry [LAMMC]

GIBON, Yves
Biologie du fruit et pathologie [BFP]

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Article de revue

Ce document a été publié dans

Plants. 2022-11, vol. 11, n° 21, p. 2818

MDPI

Résumé en anglais

Low temperature during cold acclimation (CA) leads to the accumulation of detrimental reactive oxygen species (ROS) in plant tissues, which are scavenged by antioxidants, such as ascorbate and glutathione. However, there is a lack of studies examining the dynamics of antioxidants throughout CA, deacclimation (DEA), and reacclimation (REA) in winter wheat. Six winter wheat genotypes were selected to assess the effect of CA, DEA, and REA on the concentrations of ascorbate and glutathione in leaf and crown tissues under two CA temperature treatments. Higher levels of total, reduced, and oxidised ascorbate were determined in leaves, whereas crowns accumulated higher concentrations of nicotinamide adenine dinucleotide (NAD+) after CA, DEA, and REA. Constant low temperature (CLT) during CA led to higher contents of ascorbate and glutathione in both tissues at all stages of acclimation, in comparison with prolonged higher low temperature (PHLT). The concentrations of antioxidants increased after CA, tended to decrease after DEA, and returned to CA levels after REA. Significant positive correlations between freezing tolerance (FT) and antioxidants were only determined under the CA at CLT treatment, thus, affirming the negative effect of PHLT during CA on the FT of winter wheat.< Réduire

Mots clés en anglais

ascorbate

climate change

freezing tolerance

glutathione

low-temperature stress

Triticum aestivum L.

winter hardiness

Abiotic stresses

DOI

http://dx.doi.org/10.3390/plants11212818

Projet Européen

European Plant Phenotyping Network 2020

Origine

Importé de hal

Unités de recherche

Biologie du Fruit & Pathologie (BFP) - UMR 1332