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Transcriptomic analysis of changes in gene expression during flowering induction in sugarcane under controlled photoperiodic conditions

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Manechini, João Ricardo Vieira, Santos, Paulo Henrique da Silva, Romanel, Elisson, Brito, Michael dos Santos, Scarpari, Maximiliano Salles, Jackson, Stephen D., Pinto, Luciana Rossini and Vicentini, Renato (2021) Transcriptomic analysis of changes in gene expression during flowering induction in sugarcane under controlled photoperiodic conditions. Frontiers in Plant Science, 12 . 635784. doi:10.3389/fpls.2021.635784

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Official URL: http://dx.doi.org/10.3389/fpls.2021.635784

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Abstract

Flowering is of utmost relevance for the agricultural productivity of the sugarcane bioeconomy, but data and knowledge of the genetic mechanisms underlying its photoperiodic induction are still scarce. An understanding of the molecular mechanisms that regulate the transition from vegetative to reproductive growth in sugarcane could provide better control of flowering for breeding. This study aimed to investigate the transcriptome of +1 mature leaves of a sugarcane cultivar subjected to florally inductive and non-inductive photoperiodic treatments to identify gene expression patterns and molecular regulatory modules. We identified 7,083 differentially expressed (DE) genes, of which 5,623 showed significant identity to other plant genes. Functional group analysis showed differential regulation of important metabolic pathways involved in plant development, such as plant hormones (i.e., cytokinin, gibberellin, and abscisic acid), light reactions, and photorespiration. Gene ontology enrichment analysis revealed evidence of upregulated processes and functions related to the response to abiotic stress, photoprotection, photosynthesis, light harvesting, and pigment biosynthesis, whereas important categories related to growth and vegetative development of plants, such as plant organ morphogenesis, shoot system development, macromolecule metabolic process, and lignin biosynthesis, were downregulated. Also, out of 76 sugarcane transcripts considered putative orthologs to flowering genes from other plants (such as Arabidopsis thaliana, Oryza sativa, and Sorghum bicolor), 21 transcripts were DE. Nine DE genes related to flowering and response to photoperiod were analyzed either at mature or spindle leaves at two development stages corresponding to the early stage of induction and inflorescence primordia formation. Finally, we report a set of flowering-induced long non-coding RNAs and describe their level of conservation to other crops, many of which showed expression patterns correlated against those in the functionally grouped gene network.

Item Type: Journal Article
Subjects: Q Science > QH Natural history
Q Science > QK Botany
S Agriculture > SB Plant culture
Divisions: Faculty of Science > Life Sciences (2010- )
Library of Congress Subject Headings (LCSH): Sugarcane , Sugarcane -- Flowering time, Sugarcane -- Flowering -- Molecular aspects, Photoperiodism , Gene expression
Journal or Publication Title: Frontiers in Plant Science
Publisher: Frontiers Media S.A.
ISSN: 1664-462X
Official Date: 15 June 2021
Dates:
DateEvent
15 June 2021Published
4 April 2021Accepted
Volume: 12
Article Number: 635784
DOI: 10.3389/fpls.2021.635784
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
2016/02679-9Fundação de Amparo à Pesquisa do Estado de São PauloUNSPECIFIED
2018/08380-0 [BBSRC] Biotechnology and Biological Sciences Research Councilhttp://dx.doi.org/10.13039/501100000268

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