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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

he sugar-responsive circadian clock regulator bZIP63 modulates plant growt

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Author(s):
Viana, Americo J. C. [1] ; Matiolli, Cleverson C. [1] ; Newman, David W. [1] ; Vieira, Joao G. P. [1] ; Duarte, Gustavo T. [1] ; Martins, Marina C. M. [2, 3, 4] ; Gilbault, Elodie [5] ; Hotta, Carlos T. [6] ; Caldana, Camila [3, 4, 7] ; Vincentz, Michel [1]
Total Authors: 10
Affiliation:
[1] Univ Estadual Campinas, Ctr Biol Mol & Engn Genet, Dept Biol Vegetal, Inst Biol, BR-13083875 Campinas 6010, SP - Brazil
[2] Univ Sao Paulo, Inst Biosci, Dept Bot, Lab Plant Physiol Ecol, BR-05508090 Sao Paulo, SP - Brazil
[3] Brazilian Bioethanol Sci & Technol Lab CTBE CNPEM, Rua Giuseppe Maximo Scolfaro 10000, BR-13083970 Campinas, SP - Brazil
[4] Brazilian Bioethanol Sci & Technol Lab CTBE CNPEM, Max Planck Partner Grp, Campinas, SP - Brazil
[5] Univ Paris Saclay, Inst Jean Pierre Bourgin, INRAE, AgroParisTech, F-78000 Versailles - France
[6] Univ Sao Paulo, Dept Bioquim, Inst Quim, BR-05508000 Sao Paulo, SP - Brazil
[7] Max Planck Inst Mol Plant Physiol, Muhlenberg 1, D-14476 Golm - Germany
Total Affiliations: 7
Document type: Journal article
Source: NEW PHYTOLOGIST; v. 231, n. 5, p. 1875-1889, SEP 2021.
Web of Science Citations: 4
Abstract

Adjustment to energy starvation is crucial to ensure growth and survival. In Arabidopsis thaliana (Arabidopsis), this process relies in part on the phosphorylation of the circadian clock regulator bZIP63 by SUCROSE non-fermenting RELATED KINASE1 (SnRK1), a key mediator of responses to low energy. We investigated the effects of mutations in bZIP63 on plant carbon (C) metabolism and growth. Results from phenotypic, transcriptomic and metabolomic analysis of bZIP63 mutants prompted us to investigate the starch accumulation pattern and the expression of genes involved in starch degradation and in the circadian oscillator. bZIP63 mutation impairs growth under light-dark cycles, but not under constant light. The reduced growth likely results from the accentuated C depletion towards the end of the night, which is caused by the accelerated starch degradation of bZIP63 mutants. The diel expression pattern of bZIP63 is dictated by both the circadian clock and energy levels, which could determine the changes in the circadian expression of clock and starch metabolic genes observed in bZIP63 mutants. We conclude that bZIP63 composes a regulatory interface between the metabolic and circadian control of starch breakdown to optimize C usage and plant growth. (AU)

FAPESP's process: 19/25993-9 - Elucidate the role of energy and sugar-responsive bZIP transcription factors in the regulation of starch metabolism in Arabidopsis
Grantee:Michel Georges Albert Vincentz
Support Opportunities: Regular Research Grants
FAPESP's process: 15/06260-0 - Organ- and tissue- specific circadian clocks in C4 grasses
Grantee:Carlos Takeshi Hotta
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
FAPESP's process: 08/52071-0 - Energetic homeostasis and sugar signaling: diversification of the molecular mechanisms involved in the control of the energetic balance in angiosperms
Grantee:Michel Georges Albert Vincentz
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants
FAPESP's process: 18/25710-4 - The role of sugar-responsive bZIP transcription factors in the regulation of the circadian oscillator of Arabidopsis
Grantee:Michel Georges Albert Vincentz
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 14/04117-2 - The role of the transcription factor AtbZIP63 in the interaction between carbohydrates and the circadian clock in Arabidopsis thaliana
Grantee:Américo José Carvalho Viana
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 12/09351-8 - Protein stability evaluation of transcription factor AtbZIP63 in biotic/abiotic stress responses and the role of this gene in resistance of Arabidopsis thaliana to Pseudomonas syringae pv tomato strain DC3000
Grantee:Cleverson Carlos Matiolli
Support Opportunities: Scholarships in Brazil - Post-Doctoral