PHYD prevents secondary dormancy establishment of seeds exposed to high temperature and is associated with lower PIL5 accumulation

@article{Martel2018PHYDPS,
  title={PHYD prevents secondary dormancy establishment of seeds exposed to high temperature and is associated with lower PIL5 accumulation},
  author={Catherine de Martel and Logan K. Blair and Kathleen Donohue},
  journal={Journal of Experimental Botany},
  year={2018},
  volume={69},
  pages={3157 - 3169}
}
Acquisition of secondary dormancy enables spatio-temporal control of germination. Evidence suggests that PHYD influences secondary dormancy induction by high temperature in Arabidopsis and correlates with removal of the germination repressor PIL5. 

Figures from this paper

ABA Metabolism and Homeostasis in Seed Dormancy and Germination
TLDR
An overview of the current knowledge on ABA metabolism in developing and germinating seeds and how environmental signals control seed dormancy through the adjustment of hormone levels is provided.
The Control of Seed Dormancy and Germination by Temperature, Light and Nitrate
TLDR
The current knowledge of signal transduction networks linking environmental stimulus to seed dormancy establishment, dormancy break and germination is summarized, underscoring the dominating roles of temperature, light, and nitric oxide.
A role for PM19-Like 1 in seed dormancy in Arabidopsis
TLDR
By investigating the Arabidopsis homologous PM19-Like 1 (PM19L1), it is found that it has a seed-specific expression pattern and, while its expression is higher in dormant than in non-dormant seeds, knock-out mutations produced seeds with increased dormancy.
Induced Thermo-dormancy in Rapeseed (Brassica napus L.) Cultivars by Sub- and Supra-optimal Temperatures
TLDR
In high and medium SD cultivars, light stimulated germination and reduced thermo-dormant seeds at sub- and supra-optimal temperatures, which are also affected by light condition.
PHYTOCHROME INTERACTING FACTORS at the interface of light and temperature signalling.
TLDR
Recent advances in the understanding of the mechanisms through which temperature affects PIF function and how these mechanisms are influenced by the light environment are discussed.
An Updated Overview on the Regulation of Seed Germination
TLDR
In this review, the established knowledge on the control of seed germination from a molecular and a genetic perspective is summarized and serves as a “backbone” to integrate the latest developments in the field.
Regulation of Seed Dormancy and Germination Mechanisms in a Changing Environment
TLDR
This paper focuses on presenting the adaptation mechanism of seed dormancy and germination to the various environments, with emphasis on their prospective roles in adaptation to the changing climate.
Actin Isovariant ACT7 Modulates Root Thermomorphogenesis by Altering Intracellular Auxin Homeostasis
TLDR
It is demonstrated that vegetative class actin isovariant, ACT7 modulates the long-term moderate-high temperature response in Arabidopsis root.
A Modified Method to Assess Secondary Dormancy in the Seeds of Different Rapeseed Lines and Cultivars
TLDR
This method helps seed breeders to improve the screening of new rapeseed lines and cultivars with lower potential for secondary dormancy and as a result reduce the risk of volunteer rapeseed emergence in the field, which compromises yield in the next growing season.
Developmental Plasticity at High Temperature1[OPEN]
TLDR
Molecular mechanisms controlling the thermal response in Arabidopsis are described, and efforts are made to understand the mechanism behind this response by isolating the “spatially insatiable” response inArabidopsis.
...
...

References

SHOWING 1-10 OF 70 REFERENCES
Diversification of phytochrome contributions to germination as a function of seed-maturation environment.
TLDR
Among the first genes to be associated with maternal environmental effects on germination are identified, indicating that PHYA contributes to the maintenance of cool-induced dormancy on a phyD background.
Secondary dormancy in light-sensitive lettuce seeds incubated anaerobically or at elevated temperature
Light-sensitive lettuce seeds become secondarily dormant within 8–10 days if initial germination is suppressed by far-red light or incubation at elevated temperature (≥30 °C). When germination is
Induction of secondary dormancy in sunflower seeds by high temperature. Possible involvement of ethylene biosynthesis
TLDR
The induction of thermodormancy in sunflower seeds seems associated with loss of their ability to convert 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylene, and possible effects of high temperature on membranes and ethylene forming enzyme (EFE) are discussed.
Molecular aspects of seed dormancy.
TLDR
The net result is a slightly heterogeneous response, thereby providing more temporal options for successful germination.
Seed dormancy and germination.
Secondary dormancy dynamics depends on primary dormancy status in Arabidopsis thaliana
TLDR
It is found that low water potential and a range of temperatures, from 8°C to 35°C, induced secondary dormancy in seeds of Arabidopsis thaliana and this suggests that the interaction of seed-maturation temperature, afterripening and post-dispersal conditions all combine to regulate the time of year of seed germination.
New Roles of Phytochromes during Seed Germination
TLDR
The diversification of activities of all these phytochromes during this one process of Germination suggests that they all have a combined function in the regulation of germination responses to complex seasonal conditions and that gene duplication can contribute to the evolution of precise responses to variable environments.
ABA action and interactions in seeds.
Light activates the degradation of PIL5 protein to promote seed germination through gibberellin in Arabidopsis.
TLDR
The data indicate that phytochromes promote seed germination by degrading PIL5, which leads to increased GA biosynthesis and decreased GA degradation.
A new role for phytochromes in temperature-dependent germination.
TLDR
Evidence that phytochrome-mediated germination pathways simultaneously respond to light and temperature cues in ways that affect germination is provided using Arabidopsis thaliana to reveal a potentially novel role for phy tochrome pathways in regulating the seasonal timing of germination.
...
...