The impact of far‐red light supplementation on hormonal re‐sponses to cold acclimation in barley

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F21%3A00545999" target="_blank" >RIV/61389030:_____/21:00545999 - isvavai.cz</a>

Result on the web

<a href="http://doi.org/10.3390/biom11030450" target="_blank" >http://doi.org/10.3390/biom11030450</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/biom11030450" target="_blank" >10.3390/biom11030450</a>

Result language

angličtina

Original language name

The impact of far‐red light supplementation on hormonal re‐sponses to cold acclimation in barley

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10609 - Biochemical research methods

Project

<a href="/en/project/EF16_019%2F0000738" target="_blank" >EF16_019/0000738: Centre for Experimental Plant Biology</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Biomolecules

ISSN

2218-273X

e-ISSN

2218-273X

Volume of the periodical

11

Issue of the periodical within the volume

3

Country of publishing house

CH - SWITZERLAND

Number of pages

19

Pages from-to

450

UT code for WoS article

000633402300001

EID of the result in the Scopus database

2-s2.0-85102644133