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Functional conservation of rice OsNF-YB/YC and Arabidopsis AtNF-YB/YC proteins in the regulation of flowering time

Functional conservation of rice OsNF-YB/YC and Arabidopsis AtNF-YB/YC proteins in the regulation... Plant NUCLEAR FACTOR Y (NF-Y) transcription factors play important roles in plant development and abiotic stress. In Arabidopsis thaliana , two NF - YB (At NF - YB2 and At NF - YB3 ) and five NF - YC (At NF - YC1 , At NF - YC2 , At NF - YC3 , At NF - YC4 , and At NF - YC9 ) genes regulate photoperiodic flowering by interacting with other AtNF-Y subunit proteins. Three rice NF - YB (Os NF - YB8 , Os NF - YB10 , and Os NF - YB11 ) and five rice Os NF - YC (Os NF - YC1 , Os NF - YC2 , Os NF - YC4 , Os NF - YC6 , and Os NF - YC7 ) genes are clustered with two At NF - YB and five At NF - YC genes, respectively. To investigate the functional conservation of these NF - YB and NF - YC genes in rice and Arabidopsis , we analyzed the flowering phenotypes of transgenic plants overexpressing the respective Os NF - YB and Os NF - YC genes in Arabidopsis mutants. Overexpression of Os NF - YB8 / 10 / 11 and Os NF - YC2 complemented the late flowering phenotype of Arabidopsis nf - yb2 nf - yb3 and nf - yc3 nf - yc4 nf - yc9 mutants, respectively. The rescued phenotype of 35S:: Os NF - YC2 nf - yc3 nf - yc4 nf - yc9 plants was attributed to the upregulation of FLOWERING LOCUS T ( FT ) and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 ( SOC1 ). In vitro and in planta protein–protein analyses revealed that OsNF-YB8/10/11 and OsNF-YC1/2/4/6/7 interact with AtNF-YC3/4/9 and AtNF-YB2/3, respectively. Our data indicate that some Os NF - YB and Os NF - YC genes are functional equivalents of At NF - YB2 / 3 and At NF - YC3 / 4 / 9 genes, respectively, and suggest functional conservation of Arabidopsis and rice NF - Y genes in the control of flowering time. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Cell Reports Springer Journals

Functional conservation of rice OsNF-YB/YC and Arabidopsis AtNF-YB/YC proteins in the regulation of flowering time

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References (42)

Publisher
Springer Journals
Copyright
Copyright © 2016 by Springer-Verlag Berlin Heidelberg
Subject
Life Sciences; Plant Sciences; Cell Biology; Biotechnology; Plant Biochemistry
ISSN
0721-7714
eISSN
1432-203X
DOI
10.1007/s00299-015-1927-1
pmid
26754793
Publisher site
See Article on Publisher Site

Abstract

Plant NUCLEAR FACTOR Y (NF-Y) transcription factors play important roles in plant development and abiotic stress. In Arabidopsis thaliana , two NF - YB (At NF - YB2 and At NF - YB3 ) and five NF - YC (At NF - YC1 , At NF - YC2 , At NF - YC3 , At NF - YC4 , and At NF - YC9 ) genes regulate photoperiodic flowering by interacting with other AtNF-Y subunit proteins. Three rice NF - YB (Os NF - YB8 , Os NF - YB10 , and Os NF - YB11 ) and five rice Os NF - YC (Os NF - YC1 , Os NF - YC2 , Os NF - YC4 , Os NF - YC6 , and Os NF - YC7 ) genes are clustered with two At NF - YB and five At NF - YC genes, respectively. To investigate the functional conservation of these NF - YB and NF - YC genes in rice and Arabidopsis , we analyzed the flowering phenotypes of transgenic plants overexpressing the respective Os NF - YB and Os NF - YC genes in Arabidopsis mutants. Overexpression of Os NF - YB8 / 10 / 11 and Os NF - YC2 complemented the late flowering phenotype of Arabidopsis nf - yb2 nf - yb3 and nf - yc3 nf - yc4 nf - yc9 mutants, respectively. The rescued phenotype of 35S:: Os NF - YC2 nf - yc3 nf - yc4 nf - yc9 plants was attributed to the upregulation of FLOWERING LOCUS T ( FT ) and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 ( SOC1 ). In vitro and in planta protein–protein analyses revealed that OsNF-YB8/10/11 and OsNF-YC1/2/4/6/7 interact with AtNF-YC3/4/9 and AtNF-YB2/3, respectively. Our data indicate that some Os NF - YB and Os NF - YC genes are functional equivalents of At NF - YB2 / 3 and At NF - YC3 / 4 / 9 genes, respectively, and suggest functional conservation of Arabidopsis and rice NF - Y genes in the control of flowering time.

Journal

Plant Cell ReportsSpringer Journals

Published: Apr 1, 2016

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