Temperature and Light-Quality-Dependent Regulation of Freezing Tolerance in Barley

Ahres, Mohamed; Gierczik, Krisztián; Boldizsár, Ákos; Vítámvás, Pavel; Galiba, Gábor

doi:10.3390/plants9010083

Cited by 23 publications

(34 citation statements)

References 69 publications

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“…Using this regulatory mechanism, the reduced ambient temperature, shorter days and increased twilight (during which the R:FR ratio is lower) during autumn might initiate a certain degree of cold acclimation before the onset of winter (Franklin & Whitelam, 2007a). A comparable effect of a lower R:FR ratio on frost tolerance was also found in barley (Ahres, Gierczik, Boldizsár, Vítámvás, & Galiba, 2020).…”

Section: Light and Temperature Stresssupporting

confidence: 63%

Light acts as a stressor and influences abiotic and biotic stress responses in plants

Roeber

Bajaj

Rohde

et al. 2020

Plant Cell & Environment

173

104

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Light is important for plants as an energy source and a developmental signal, but it can also cause stress to plants and modulates responses to stress. Excess and fluctuating light result in photoinhibition and reactive oxygen species (ROS) accumulation around photosystems II and I, respectively. Ultraviolet light causes photodamage to DNA and a prolongation of the light period initiates the photoperiod stress syndrome. Changes in light quality and quantity, as well as in light duration are also key factors impacting the outcome of diverse abiotic and biotic stresses. Short day or shady environments enhance thermotolerance and increase cold acclimation. Similarly, shade conditions improve drought stress tolerance in plants. Additionally, the light environment affects the plants' responses to biotic intruders, such as pathogens or insect herbivores, often reducing growth‐defence trade‐offs. Understanding how plants use light information to modulate stress responses will support breeding strategies to enhance crop stress resilience. This review summarizes the effect of light as a stressor and the impact of the light environment on abiotic and biotic stress responses. There is a special focus on the role of the different light receptors and the crosstalk between light signalling and stress response pathways.

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Section: Light and Temperature Stresssupporting

confidence: 63%

Light acts as a stressor and influences abiotic and biotic stress responses in plants

Roeber

Bajaj

Rohde

et al. 2020

Plant Cell & Environment

173

104

View full text Add to dashboard Cite

show abstract

“…Light quality, especially higher FR proportion was found to be an important factor in cold acclimation processes in Arabidopsis thaliana (L.). In our previous studies, we demonstrated that the decreased R/FR ratio positively influenced the freezing tolerance of wheat and barley cereals, which could be further enhanced by increasing the light intensity in the pre-hardening phase [ 61 , 62 ]. Light is perceived by plants via photoreceptors; R and FR by phytochromes [ 61 , 63 , 64 , 65 ].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Far-Red Light Supplementation on Hormonal Responses to Cold Acclimation in Barley

et al. 2021

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Cold acclimation, the necessary prerequisite for promotion of freezing tolerance, is affected by both low temperature and enhanced far-red/red light (FR/R) ratio. The impact of FR supplementation to white light, created by artificial LED light sources, on the hormone levels, metabolism, and expression of the key hormone metabolism-related genes was determined in winter barley at moderate (15 °C) and low (5 °C) temperature. FR-enhanced freezing tolerance at 15 °C was associated with promotion of abscisic acid (ABA) levels, and accompanied by a moderate increase in indole-3-acetic acid (IAA) and cis-zeatin levels. The most prominent impact on the plants’ freezing tolerance was found after FR pre-treatment at 15 °C (for 10 days) followed by cold treatment at FR supplementation (7 days). The response of ABA was diminished in comparison with white light treatment, probably due to the elevation of stress tolerance during FR pre-treatment. Jasmonic acid (JA) and salicylic acid (SA) were transiently reduced. When the plants were exposed directly to a combination of cold (5 °C) and FR supplementation, ABA increase was higher than in white light, and was associated with enhanced elevation of JA and, in the longer term (after 7 days), with IAA and cis-zeatin increase, which indicates a stronger stress response and better acclimation. Cold hardening was more efficient when FR light was applied in the early developmental stage of the barley plants (three-leaf stage, 18 days), rather than in later stages (28-days). The dynamics of the phytohormone changes are well supported by the expression profiles of the key hormone metabolism-related genes. This series of treatments serves as evidence for the close relationship between plant hormones, light quality, and low temperature at the beginning of cold acclimation. Besides the timing of the FR treatments, plant age also represents a key factor during light spectrum-dependent cold acclimation.

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“…To elucidate the interaction between far-red (FR) light and cold treatment in the pre-hardening process, barley plantlets were grown under different light conditions with low, normal, and high light intensities at 5 and 15 °C, and the expression of the HvCBF14 gene and two well-characterized members of the CBF-regulon, HvCOR14b and HvDHN5 , were studied [ 21 ]. The supplemented FR illumination induced the expression of HvCBF14 and of its target gene HvCOR14b at both temperatures, and the combined effects of cold and FR supplementation increased freezing tolerance in synergy [ 21 ]. Earlier experiments demonstrated the impact of complementary FR illumination on CBF gene expression [ 6 , 8 , 22 ] in different cereals, and the strongest impact of the FR treatment was found at 15 °C after 10 days, whereas at 5 °C after 7 days.…”

Section: Introductionmentioning

confidence: 99%

Decreased R:FR Ratio in Incident White Light Affects the Composition of Barley Leaf Lipidome and Freezing Tolerance in a Temperature-Dependent Manner

Kovács

Ahres

Pálmai

et al. 2020

IJMS

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In cereals, C-repeat binding factor genes have been defined as key components of the light quality-dependent regulation of frost tolerance by integrating phytochrome-mediated light and temperature signals. This study elucidates the differences in the lipid composition of barley leaves illuminated with white light or white light supplemented with far-red light at 5 or 15 °C. According to LC-MS analysis, far-red light supplementation increased the amount of monogalactosyldiacylglycerol species 36:6, 36:5, and 36:4 after 1 day at 5 °C, and 10 days at 15 °C resulted in a perturbed content of 38:6 species. Changes were observed in the levels of phosphatidylethanolamine, and phosphatidylserine under white light supplemented with far-red light illumination at 15 °C, whereas robust changes were observed in the amount of several phosphatidylserine species at 5 °C. At 15 °C, the amount of some phosphatidylglycerol species increased as a result of white light supplemented with far-red light illumination after 1 day. The ceramide (42:2)-3 content increased regardless of the temperature. The double-bond index of phosphatidylglycerol, phosphatidylserine, phosphatidylcholine ceramide together with total double-bond index changed when the plant was grown at 15 °C as a function of white light supplemented with far-red light. white light supplemented with far-red light increased the monogalactosyldiacylglycerol/diacylglycerol ratio as well. The gene expression changes are well correlated with the alterations in the lipidome.

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Temperature and Light-Quality-Dependent Regulation of Freezing Tolerance in Barley

Cited by 23 publications

References 69 publications

Light acts as a stressor and influences abiotic and biotic stress responses in plants

Light acts as a stressor and influences abiotic and biotic stress responses in plants

The Impact of Far-Red Light Supplementation on Hormonal Responses to Cold Acclimation in Barley

Decreased R:FR Ratio in Incident White Light Affects the Composition of Barley Leaf Lipidome and Freezing Tolerance in a Temperature-Dependent Manner

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