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CRISPR/Cas9 mutants delineate roles of Populus FT and TFL1/CEN/BFT family members in growth, dormancy release and flowering

Journal Article · · Tree Physiology (Online)

Abstract

Vegetative and reproductive phase change and phenology are economically and ecologically important traits. Trees typically require several years of growth before flowering and, once mature, seasonal control of the transition to flowering and flower development is necessary to maintain vegetative meristems and for reproductive success. Members of two related gene subfamilies, FLOWERING LOCUST (FT) and TERMINAL FLOWER1 (TFL1)/CENTRORADIALIS (CEN)/BROTHER OF FT AND TFL1 (BFT), have antagonistic roles in flowering in diverse species and roles in vegetative phenology in trees, but many details of their functions in trees have yet to be resolved. Here, we used CRISPR/Cas9 to generate single and double mutants involving the five Populus FT and TFL1/CEN/BFT genes. The ft1 mutants exhibited wild-type-like phenotypes in long days and short days, but after chilling, to release dormancy, they showed delayed bud flush and GA3 could compensate for the ft1 mutation. After rooting and generating some phytomers in tissue culture, both cen1 and cen1ft1 mutants produced terminal as well as axillary flowers, indicating that the cen1 flowering phenotype is independent of FT1. The CEN1 showed distinct circannual expression patterns in vegetative and reproductive tissues and comparison with the expression patterns of FT1 and FT2 suggests that the relative levels of CEN1 compared with FT1 and FT2 regulate multiple phases of vegetative and reproductive seasonal development.

Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0012574
OSTI ID:
1984552
Journal Information:
Tree Physiology (Online), Journal Name: Tree Physiology (Online) Journal Issue: 6 Vol. 43; ISSN 1758-4469
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (55)

Analysis of Relative Gene Expression Data Using Real-Time Quantitative PCR and the 2−ΔΔCT Method journal December 2001
Phase Change and Phenology in Trees book January 2017
Repression of gibberellin biosynthesis or signaling produces striking alterations in poplar growth, morphology, and flowering journal July 2011
The Role of Recently Derived FT Paralogs in Sunflower Domestication journal April 2010
FLOWERING LOCUS T paralogs control the annual growth cycle in Populus trees journal July 2022
The FLOWERING LOCUS T/TERMINAL FLOWER 1 Gene Family: Functional Evolution and Molecular Mechanisms journal July 2015
Shoot meristems of deciduous woody perennials: self-organization and morphogenetic transitions journal February 2014
Regulation of Flowering Time: When and Where? journal October 2021
Evolution and functional diversification of FLOWERING LOCUS T/TERMINAL FLOWER 1 family genes in plants journal January 2021
Turning Meristems into Fortresses journal May 2019
Hormonal control of the floral transition: Can one catch them all? journal October 2017
14-3-3 proteins act as intracellular receptors for rice Hd3a florigen journal July 2011
Multiplex and homologous recombination–mediated genome editing in Arabidopsis and Nicotiana benthamiana using guide RNA and Cas9 journal August 2013
Population genomics of Populus trichocarpa identifies signatures of selection and adaptive trait associations journal August 2014
TERMINAL FLOWER 1-FD complex target genes and competition with FLOWERING LOCUS T journal October 2020
Rapid customization of Solanaceae fruit crops for urban agriculture journal December 2019
FLOWERING LOCUS T duplication coordinates reproductive and vegetative growth in perennial poplar journal June 2011
Dual role of tree florigen activation complex component FD in photoperiodic growth control and adaptive response pathways journal February 2015
Long-range mobile signals mediate seasonal control of shoot growth journal May 2019
Molecular regulation of plant developmental transitions and plant architecture via PEPB family proteins: an update on mechanism of action journal January 2021
Phytozome: a comparative platform for green plant genomics journal November 2011
TFL1-Like Proteins in Rice Antagonize Rice FT-Like Protein in Inflorescence Development by Competition for Complex Formation with 14-3-3 and FD journal February 2018
TERMINAL FLOWER1 Functions as a Mobile Transcriptional Cofactor in the Shoot Apical Meristem journal January 2020
FLOWERING LOCUS T Improves Cucumber Adaptation to Higher Latitudes journal December 2019
Poplar FT2 Shortens the Juvenile Phase and Promotes Seasonal Flowering journal July 2006
TERMINAL FLOWER1 Is a Mobile Signal Controlling Arabidopsis Architecture journal March 2007
CENL1 Expression in the Rib Meristem Affects Stem Elongation and the Transition to Dormancy in Populus journal January 2008
Chilling of Dormant Buds Hyperinduces FLOWERING LOCUS T and Recruits GA-Inducible 1,3-β-Glucanases to Reopen Signal Conduits and Release Dormancy in Populus journal January 2011
AaTFL1Confers an Age-Dependent Response to Vernalization in PerennialArabis alpina    journal April 2011
The dynamic nature of bud dormancy in trees: environmental control and molecular mechanisms: Bud dormancy in trees journal July 2012
Populus CEN/TFL1 regulates first onset of flowering, axillary meristem identity and dormancy release in Populus: CEN/TFL1 regulates tree flowering and dormancy journal February 2010
The lack of a systematic validation of reference genes: a serious pitfall undervalued in reverse transcription-polymerase chain reaction (RT-PCR) analysis in plants journal August 2008
Nitrogen deprivation promotes Populus root growth through global transcriptome reprogramming and activation of hierarchical genetic networks journal June 2013
Vegetative phase change inPopulus tremula × alba journal April 2021
In vitro floral development in poplar: insights into seed trichome regulation and trimonoecy journal December 2022
Constitutive expression of the Poplar FD-like basic leucine zipper transcription factor alters growth and bud development journal April 2015
Mutagenesis of kiwifruitCENTRORADIALIS‐like genes transforms a climbing woody perennial with long juvenility and axillary flowering into a compact plant with rapid terminal flowering journal October 2018
CRISPR‐Cas9 ‐mediated mutagenesis of kiwifruit BFT genes results in an evergrowing but not early flowering phenotype journal July 2022
CO/FT Regulatory Module Controls Timing of Flowering and Seasonal Growth Cessation in Trees journal May 2006
The Genome of Black Cottonwood, Populus trichocarpa (Torr. & Gray) journal September 2006
Inflorescence Commitment and Architecture in Arabidopsis journal January 1997
Revolutions in agriculture chart a course for targeted breeding of old and new crops journal September 2019
The Plastochron Index as Applied to Developmental Studies of Cottonwood journal March 1971
Validating internal controls for quantitative plant gene expression studies journal January 2004
A recessive allele for delayed flowering at the soybean maturity locus E9 is a leaky allele of FT2a, a FLOWERING LOCUS T ortholog journal January 2016
Asymmetric expansions of FT and TFL1 lineages characterize differential evolution of the EuPEBP family in the major angiosperm lineages journal August 2021
A major locus controls local adaptation and adaptive life history variation in a perennial plant journal June 2018
The SELF-PRUNING gene of tomato regulates vegetative to reproductive switching of sympodial meristems and is the ortholog of CEN and TFL1 journal June 1998
Transgenic Suppression of AGAMOUS Genes in Apple Reduces Fertility and Increases Floral Attractiveness journal August 2016
Genome-Wide Assessment of Efficiency and Specificity in CRISPR/Cas9 Mediated Multiple Site Targeting in Arabidopsis journal September 2016
Florigen and anti-florigen – a systemic mechanism for coordinating growth and termination in flowering plants journal September 2014
FLOWERING LOCUS T2 Promotes Shoot Apex Development and Restricts Internode Elongation via the 13-Hydroxylation Gibberellin Biosynthesis Pathway in Poplar journal February 2022
Functional Diversification of Populus FLOWERING LOCUS D-LIKE3 Transcription Factor and Two Paralogs in Shoot Ontogeny, Flowering, and Vegetative Phenology journal February 2022
Populus SVL Acts in Leaves to Modulate the Timing of Growth Cessation and Bud Set journal February 2022
Shoot morphogenesis associated with flowering in Populus deltoides (Salicaceae) journal February 2003

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