Journal
BMC PLANT BIOLOGY
Volume 19, Issue 1, Pages -Publisher
BMC
DOI: 10.1186/s12870-019-2157-4
Keywords
TCP8; Flowering; FLC; Vernalization; Arabidopsis
Categories
Funding
- Natural Science Foundation of Guangdong Province [2018A030313966]
- Shenzhen Science and Technology Innovation Committee [JCYJ20170818100038326]
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Background: Flowering is a key process in the life cycle of plants. The transition from vegetative to reproductive growth is thus under sophisticated regulation by endogenous and environmental signals. The plant-specific Teosinte Branched 1/Cycloidea/Proliferating Cell Factors (TCP) family transcription factors are involved in many biological processes, but their roles in regulating flowering have not been totally elucidated. Results: We explored the role of Arabidopsis TCP8 in plant development and, especially, in flowering control. Overexpression of TCP8 significantly delayed flowering under both long-day and short-day conditions and dominant repression by TCP8 led to various growth defects. The upregulation of TCP8 led to more accumulated mRNA level of FLOWERING LOCUS C (FLC), a central floral repressor of Arabidopsis. TCP8 functions in an FLC-dependent manner, as TCP8 overexpression in the flc-6 loss-of-function mutant failed to delay flowering. The vernalization treatment could reverse the late flowering phenotype caused by TCP8 overexpression. Conclusions: Our results provide evidence for a role of TCP8 in flowering control and add to our knowledge of the molecular basis of TCP8 function.
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