Diurnal patterns of growth and transient reserves of sink and source tissues are affected by cold nights in barley.
Carbon
/ metabolism
Carbon Dioxide
/ metabolism
Chlorophyll
/ metabolism
Circadian Rhythm
/ physiology
Cold Temperature
Darkness
Fluorescence
Fructans
/ metabolism
Hordeum
/ growth & development
Malates
/ metabolism
Metabolome
Photosynthesis
Plant Proteins
/ metabolism
Plant Stomata
/ physiology
Plant Transpiration
/ physiology
Solubility
Starch
/ metabolism
Sucrose
/ metabolism
Sugars
/ metabolism
EARLY FLOWERING 3
barley growth
carbon metabolism
circadian clock
cold
diurnal metabolism
fructans
malate
starch
sucrose
Journal
Plant, cell & environment
ISSN: 1365-3040
Titre abrégé: Plant Cell Environ
Pays: United States
ID NLM: 9309004
Informations de publication
Date de publication:
06 2020
06 2020
Historique:
received:
04
10
2019
revised:
18
12
2019
accepted:
25
01
2020
pubmed:
6
2
2020
medline:
29
1
2021
entrez:
4
2
2020
Statut:
ppublish
Résumé
Barley is described to mostly use sucrose for night carbon requirements. To understand how the transient carbon is accumulated and utilized in response to cold, barley plants were grown in a combination of cold days and/or nights. Both daytime and night cold reduced growth. Sucrose was the main carbohydrate supplying growth at night, representing 50-60% of the carbon consumed. Under warm days and nights, starch was the second contributor with 26% and malate the third with 15%. Under cold nights, the contribution of starch was severely reduced, due to an inhibition of its synthesis, including under warm days, and malate was the second contributor to C requirements with 24-28% of the total amount of carbon consumed. We propose that malate plays a critical role as an alternative carbon source to sucrose and starch in barley. Hexoses, malate, and sucrose mobilization and starch accumulation were affected in barley elf3 clock mutants, suggesting a clock regulation of their metabolism, without affecting growth and photosynthesis however. Altogether, our data suggest that the mobilization of sucrose and malate and/or barley growth machinery are sensitive to cold.
Substances chimiques
Fructans
0
Malates
0
Plant Proteins
0
Sugars
0
Chlorophyll
1406-65-1
Carbon Dioxide
142M471B3J
Sucrose
57-50-1
Carbon
7440-44-0
malic acid
817L1N4CKP
Starch
9005-25-8
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1404-1420Subventions
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/N018540/1
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BBB/M000435/1
Pays : United Kingdom
Informations de copyright
© 2020 John Wiley & Sons Ltd.
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