Comparative Analysis of Antioxidant Accumulation under Cold Acclimation, Deacclimation and Reacclimation in Winter Wheat

Vaitkevičiūtė, Gabija; Aleliūnas, A.; Gibon, Yves; Armoniené, Rita

doi:10.3390/plants11212818

Cited by 2 publications

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“…Furthermore, the findings of Willick et al (2021) propose that REA in winter wheat and rye is more feasible after a dry winter thaw, as opposed to a wet winter thaw. Our earlier studies demonstrate that six winter wheat genotypes with different levels of FT are capable of REA, during which they accumulate soluble carbohydrates and antioxidants, and deplete the starch reserves in crown and leaf tissues (Vaitkevicǐutėet al, 2022a(Vaitkevicǐutėet al, , 2022b. The complex network involving vernalization requirement, soluble carbohydrates and cryoprotective proteins may play a significant role in the capacity to reacclimate (Vıtaḿvaś and Praśǐl, 2008;Trischuk et al, 2014), however, the exact mechanisms of REA are still unclear.…”

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confidence: 99%

Deacclimation and reacclimation processes in winter wheat: novel perspectives from time-series transcriptome analysis

Vaitkevičiūtė,

Aleliūnas,

Brazauskas

et al. 2024

Front. Plant Sci.

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Winter wheat achieves freezing tolerance (FT) through cold acclimation (CA) – a process which is induced by low positive temperatures in autumn. The increasing occurrences of temperature fluctuations in winter lead to deacclimation (DEA), causing premature loss of FT, and the cultivars capable of reacclimation (REA) are more likely to survive the subsequent cold spells. The genetic mechanisms of DEA and REA remain poorly understood, necessitating further research to bolster climate resilience in winter wheat. Here, we selected two winter wheat genotypes with contrasting levels of FT and conducted a ten-week-long experiment imitating low-temperature fluctuations after CA under controlled conditions. Crown and leaf tissue samples for RNA-sequencing were collected at CA, DEA, and REA time-points. It is the first transcriptomic study covering both short- and long-term responses to DEA and REA in winter wheat. The study provides novel knowledge regarding CA, DEA, and REA and discusses the gene expression patterns conferring FT under temperature fluctuations. The freezing-tolerant genotype “Lakaja DS” showed elevated photosynthetic activity in leaf tissue and upregulated cryoprotective protein-encoding genes in crowns after CA when compared to the freezing-susceptible “KWS Ferrum”. “Lakaja DS” also expressed cold acclimation-associated transcripts at a significantly higher level after 1 week of DEA. Following REA, “Lakaja DS” continued to upregulate dehydrin-related genes in crowns and exhibited significantly higher expression of chitinase transcripts in leaves, when compared to “KWS Ferrum”. The findings of this study shed light on the genetic mechanisms governing DEA and REA in winter wheat, thus addressing the gaps in knowledge regarding FT under low-temperature fluctuations. The identified genes should be further examined as potential molecular markers for breeding strategies focused on developing freezing-tolerant winter-type crops. Publicly available datasets generated in this study are valuable resources for further research into DEA and REA, contributing towards the enhancement of winter wheat under global climate change.

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Section: Introductionmentioning

confidence: 99%

Deacclimation and reacclimation processes in winter wheat: novel perspectives from time-series transcriptome analysis

Vaitkevičiūtė,

Aleliūnas,

Brazauskas

et al. 2024

Front. Plant Sci.

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Physiological and Biochemical Background of Deacclimation in Plants, with Special Attention Being Paid to Crops: A Minireview

Stachurska,

Janeczko

2024

Agronomy

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Global climate change, which is connected to global warming and changes in weather patterns, affects various parts of the environment, including the growth/development of plants. Generally, a number of plant species are capable of acquiring tolerance to frost after exposure to cold (in the cold-acclimation/cold-hardening process). In the last few decades, there have been more and more frequent periods of higher temperatures—warm periods that, e.g., break down the process of cold acclimation. This generates deacclimation, which could stimulate growth and lower frost tolerance in plants. Generally, deacclimation causes the reversal of changes induced by cold acclimation (i.e., in concentration of sugars, accumulation of protective proteins, or hormonal homeostasis). Unlike cold acclimation, the phenomenon of deacclimation has been less studied. The aim of this article was (1) to briefly describe the problem of deacclimation, with more attention being paid to its significance for economically important winter crop species, (2) to review and characterize the physiological-biochemical changes that are induced in plants by deacclimation, and (3) to discuss the possibilities of detecting deacclimation earlier in order to counteract its effects on crops.

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Comparative Analysis of Antioxidant Accumulation under Cold Acclimation, Deacclimation and Reacclimation in Winter Wheat

Cited by 2 publications

References 55 publications

Deacclimation and reacclimation processes in winter wheat: novel perspectives from time-series transcriptome analysis

Deacclimation and reacclimation processes in winter wheat: novel perspectives from time-series transcriptome analysis

Physiological and Biochemical Background of Deacclimation in Plants, with Special Attention Being Paid to Crops: A Minireview

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