Abstract
The initiation of flowering is a crucial event in the life cycle of plants. Flowering marks the transition of the plant from its vegetative to reproductive state. Flowers are shoot modifications derived from flower primordia, as a means of reproduction and securing seed production adopted by plants to transmit their genomic information across generations for the survival of the species. Floral transition is a consequence of the interplay between endogenous factors such as plant genetic structure, and exogenous factors such as photoperiod, temperature, and nutrients. The generic mechanism of flowering initiation is evolutionarily conserved across plant families. In addition, it is highly dependent on the genetic and physiological characteristics of individual species, in coordination with the surrounding environmental factors. Therefore, flowering control is extremely adaptable to seasonal changes, ensuring the reproductive success of the plant species. The genes involved in flowering control maintain a delicate balance orchestrated by different signalling mechanisms in response to the environmental cues. In this study, various mechanisms related to flowering are collectively demonstrated in terms of endogenous genetic cues responding to natural exogenous triggers and artificial inducers, including environmental factors and phytohormones, respectively.
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Abbreviations
- AP1,2:
-
APATELLA 1,2
- PI:
-
Pistillata
- AG:
-
Agamous
- TF1:
-
Terminal flower 1
- LFY:
-
Leafy gene
- CAL:
-
Cauliflower
- FUL:
-
Fruitful
- UFO:
-
Unusual floral organs
- EF1:
-
Elongation factor 1
- FT:
-
Flowering locus T
- CO:
-
Constans
- TSF1:
-
Twin sister of FT
- F-BOX1:
-
F-box transcription factor
- FKF1:
-
Flavin-binding Kelch repeat, F-box1
- LOV:
-
Light, oxygen, voltage
- GI:
-
Gigantea
- CDF1:
-
Cyclin DOF factor 1
- COP1:
-
Constitutive photomorphogenic 1
- PRC 1&2:
-
Polycomb repressive complexes 1,2
- NF-Y:
-
Nuclear factor Y
- SAM:
-
Shoot apical meristem
- FD:
-
Flowering locus D
- FDP:
-
FD paralog
- FLC:
-
Flowering locus D
- MADS:
-
Initial letter if MCM1 agamous, deficiens
- SOC1:
-
Suppressor of overexpression of CO1
- COI1:
-
Coronatine insensitive 1
- SPL15:
-
Squamosa promoter-binding-like protein 15
- FCA:
-
Flowering control locus A
- FY:
-
Flowering time control protein Y
- FLK:
-
Flowering locus KH domain
- LD:
-
Long day
- FLD:
-
Flowering locus D
- SD:
-
Short day
- ZTL:
-
Zeitlupe
- LKP2:
-
LOV Kelch protein 2
- CCA1:
-
Circadian clock associated 1
- LHY:
-
Late elongated hypocotyl
- TOC1:
-
Timing of CAB expression 1
- LUX:
-
Lux Arrythmo
- ELF4:
-
Early flowering 4
- EC:
-
Evening complex
- PIF:
-
Phytochrome interacting factor
- SVP:
-
Short vegetative phase, HOS1, high expression of osmotically responsive genes 1
- ABA:
-
Abscisic acid
- ABRE:
-
ABA-responsive element binding protein
- ABFs:
-
ABRE-binding factors
- FMT:
-
Friendly mitochondria
- TFL1:
-
Terminal flower1
- ABI3:
-
Abscisic acid insensitive 3
- GAI:
-
GA insensitive;
- RGA:
-
Repressor of GA1-3
- RGL1:
-
RGA-like 1
- NTL8:
-
Transmembrane motif 1- like 8
- BFT:
-
Brother of FT
- CRY1:
-
Cryptochrome 1
- JA:
-
Jasmonic acid
- ET:
-
Ethylene
- RGL123:
-
RGA-like 1,2,3
- SOC1:
-
MADS-box gene SOC1
- MYB33:
-
Myeloblastosis 33
- PIN1:
-
Peptidylproyl cis/trans isomerase NIMA interacting 1
- PAT:
-
Phosphinothricin acetyl transferase
- AIL:
-
Aintegumenta-like
- PLT:
-
Plethora
- ERF:
-
Ethylene-responsive factor
- PYR:
-
Pyrabactin resistance
- RCAR:
-
Regulatory components of ABA receptors
- PP2Cs:
-
Type 2 C protein phosphatases
- SnRK:
-
Snf1- related protein kinase
- bZIP:
-
Basic leucine zipper
- ABI:
-
Abscisic acid insensitive
- AAC:
-
1-Aminocyclopropane-1-carboxylic acid
- ACS:
-
AAC synthase
- EIN3:
-
Ethylene sensitive 3
- EIL:
-
EIN3- like
- ATR1:
-
Altered tryptophan regulator 1
- CTR1:
-
Coronatine insensitive 1
- EBF 12:
-
EIN3-binding f box protein 1
- SCFcoi1 E3:
-
SKP/Cullin1/F-box protein COI1 E3-ubiquitin-ligase complex
- JAZ:
-
JASMONATE ZIM domain
- bHLH-MYCs:
-
Basic helix–loop–helix-myelocytomatosis oncogenes
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Acknowledgements
This research was funded by the New Breeding Technologies Development Program (No. PJ01485802), Rural Development Administration, Republic of Korea. The permission to use Fig. 4 in this manuscript has been granted (Moon et al. 2003).
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Kaur, C., Lim, Y.P. & Lee, GJ. Co-ordinated responses to endogenous and environmental triggers allow a well-timed floral transition in plants. Plant Biotechnol Rep 16, 145–159 (2022). https://doi.org/10.1007/s11816-021-00731-z
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DOI: https://doi.org/10.1007/s11816-021-00731-z