scholarly journals Molecular Basis to Integrate Microgravity Signals into the Photoperiodic Flowering Pathway in Arabidopsis thaliana under Spaceflight Condition

2021 ◽  
Vol 23 (1) ◽  
pp. 63
Author(s):  
Junyan Xie ◽  
Lihua Wang ◽  
Huiqiong Zheng
Keyword(s):  
Time Course ◽  
Life Support ◽  
Protein Stabilization ◽  
Photoperiodic Flowering ◽  
Space Experiments ◽  
Whole Genome Microarray ◽  
Flowering Pathway ◽  
Stress Signals ◽  
Flowering Regulation ◽  
Response To Temperature

Understanding the effects of spaceflight on plant flowering regulation is important to setup a life support system for long-term human space exploration. However, the way in which plant flowering is affected by spaceflight remains unclear. Here, we present results from our latest space experiments on the Chinese spacelab Tiangong-2, in which Arabidopsis wild-type and transgenic plants pFT::GFP germinated and grew as normally as their controls on the ground, but the floral initiation under the long-day condition in space was about 20 days later than their controls on the ground. Time-course series of digital images of pFT::GFP plants showed that the expression rhythm of FT in space did not change, but the peak appeared later in comparison with those of their controls on the ground. Whole-genome microarray analysis revealed that approximately 16% of Arabidopsis genes at the flowering stage changed their transcript levels under spaceflight conditions in comparison with their controls on the ground. The GO terms were enriched in DEGs with up-regulation of the response to temperature, wounding, and protein stabilization and down-regulation of the function in circadian rhythm, gibberellins, and mRNA processes. FT and SOC1 could act as hubs to integrate spaceflight stress signals into the photoperiodic flowering pathway in Arabidopsis in space.

scholarly journals FLOWERING HTH1 is involved in CONSTANS-mediated flowering regulation in Arabidopsis

2019 ◽  
Vol 62 (1) ◽  
Author(s):  
Soon Ae Sim ◽  
Su Gyeong Woo ◽  
Dae Yeon Hwang ◽  
Jin-Hong Kim ◽  
Seung Sik Lee ◽  
...  
Keyword(s):  
Subcellular Location ◽  
Day Length ◽  
Interacting Protein ◽  
Photoperiodic Flowering ◽  
Family Protein ◽  
Flowering Regulation ◽  
Delayed Flowering ◽  
The Right ◽  
Two Hybrid ◽  
Repression Domain

Abstract Flowering at the right time is essential for maximum reproductive fitness. In Arabidopsis thaliana, the CONSTANS (CO) protein facilitates the transition from the vegetative phase to the reproductive phase under long-day conditions. The formation of heterodimeric complexes between CO and DNA binding domain-containing transcription factors is important for the induction of day length-dependent flowering. Here, we report a myb-like helix turn helix (HTH) transcriptional regulator family protein as a new modulator of floral transition, which we have named FLOWERING HTH1 (FHTH1). We isolated FHTH1 as a CO-interacting protein by a yeast two-hybrid screen using an Arabidopsis transcription factor library. Our analysis showed that FHTH1 presented in the nucleus and the FHTH1-CO complex was formed in the same subcellular location. We also observed the expression of a FHTH1:GUS construct in the leaf vasculature, where CO exists. Transgenic plants overexpressing FHTH1 fused with the plant-specific repression domain SRDX showed a delayed flowering phenotype in long days, resembling the phenotype of the co mutant. Our results suggest that FHTH1 may contribute to CO-mediated photoperiodic flowering regulation.

EF8 is involved in photoperiodic flowering pathway and chlorophyll biogenesis in rice

2014 ◽  
Vol 33 (12) ◽  
pp. 2003-2014 ◽  
Author(s):  
Zhiming Feng ◽  
Long Zhang ◽  
Chunyan Yang ◽  
Tao Wu ◽  
Jia Lv ◽  
...  
Keyword(s):  
Photoperiodic Flowering ◽  
Flowering Pathway ◽  
Chlorophyll Biogenesis

scholarly journals (299) Comparison of Growth of Salad Crops under ISS Baseline Environmental Conditions in Mixed Crop versus Monoculture Hydroponic Systems

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1010A-1010
Author(s):  
Sharon Edney ◽  
Jeffrey Richards ◽  
Matthew Sisko ◽  
Neil Yorio ◽  
Gary Stutte ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Crop Production ◽  
Time Course ◽  
Production Efficiency ◽  
Life Support ◽  
Space Station ◽  
Space Vehicle ◽  
Advanced Life Support ◽  
Cropping System ◽  
Mixed Crop

Development of a crop production system that can be used on the International Space Station, long duration transit missions, and a lunar/Mars habitat, is a part of NASA's Advanced Life Support (ALS) research efforts. Selected crops require the capability to be grown under environmental conditions that might be encountered in the open cabin of a space vehicle. It is also likely that the crops will be grown in a mixed-cropping system to increase the production efficiency and variety for the crew's dietary supplementation. Three candidate ALS salad crops, radish (Raphanus sativus L. cv. Cherry Bomb II), lettuce (Lactuca sativa L. cv. Flandria) and bunching onion (Allium fistulosum L. cv. Kinka) were grown hydroponically as either monoculture (control) or mixed-crop within a walk-in growth chamber with baseline environments maintained at 50% relative humidity, 300 μmol·m-2·s-1 PPF and a 16-hour light/8-hour dark photoperiod under cool-white fluorescent lamps. Environmental treatments in separate tests were performed with either 400, 1200, or 4000 μmol·mol-1 CO2 combined with temperature treatments of 25 °C or 28 °C. Weekly time-course harvests were taken over 28 days of growth. Results showed that none of the species experienced negative effects when grown together under mixed-crop conditions compared to monoculture growth conditions.

scholarly journals Ubiquitin-Specific Proteases UBP12 and UBP13 Act in Circadian Clock and Photoperiodic Flowering Regulation in Arabidopsis

2013 ◽  
Vol 162 (2) ◽  
pp. 897-906 ◽  
Author(s):  
Xia Cui ◽  
Falong Lu ◽  
Yue Li ◽  
Yongming Xue ◽  
Yanyuan Kang ◽  
...  
Keyword(s):  
Circadian Clock ◽  
Photoperiodic Flowering ◽  
Flowering Regulation

scholarly journals A Daylength Recognition Model of Photoperiodic Flowering

2021 ◽  
Vol 12 ◽  
Author(s):  
Xiaoying Wang ◽  
Peng Zhou ◽  
Rongyu Huang ◽  
Jianfu Zhang ◽  
Xinhao Ouyang
Keyword(s):  
Climate Change ◽  
Arabidopsis Thaliana ◽  
Oryza Sativa ◽  
Glycine Max ◽  
Plant Development ◽  
Global Climate Change ◽  
Global Climate ◽  
Photoperiodic Flowering ◽  
Flowering Pathway ◽  
Made In

The photoperiodic flowering pathway is crucial for plant development to synchronize internal signaling events and external seasons. One hundred years after photoperiodic flowering was discovered, the underlying core signaling network has been elucidated in model plants such as Arabidopsis (Arabidopsis thaliana), rice (Oryza sativa), and soybean (Glycine max). Here, we review the progress made in the photoperiodic flowering area and summarize previously accepted photoperiodic flowering models. We then introduce a new model based on daylength recognition by florigen. By determining the expression levels of the florigen gene, this model can assess the mechanism of daylength sensing and crop latitude adaptation. Future applications of this model under the constraints of global climate change are discussed.

scholarly journals OpenFOAM Simulations of Late Stage Container Draining in Microgravity

Fluids ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 207
Author(s):  
Joshua McCraney ◽  
Mark Weislogel ◽  
Paul Steen
Keyword(s):  
Free Surface ◽  
Life Support ◽  
Space Station ◽  
Geometric Complexity ◽  
Fluid Inertia ◽  
International Space ◽  
Space Experiments ◽  
Biological Liquids ◽  
And Control ◽  
Orbiting Spacecraft

In the reduced acceleration environment aboard orbiting spacecraft, capillary forces are often exploited to access and control the location and stability of fuels, propellants, coolants, and biological liquids in containers (tanks) for life support. To access the ‘far reaches’ of such tanks, the passive capillary pumping mechanism of interior corner networks can be employed to achieve high levels of draining. With knowledge of maximal corner drain rates, gas ingestion can be avoided and accurate drain transients predicted. In this paper, we benchmark a numerical method for the symmetric draining of capillary liquids in simple interior corners. The free surface is modeled through a volume of fluid (VOF) algorithm via interFoam, a native OpenFOAM solver. The simulations are compared with rare space experiments conducted on the International Space Station. The results are also buttressed by simplified analytical predictions where practicable. The fact that the numerical model does well in all cases is encouraging for further spacecraft tank draining applications of significantly increased geometric complexity and fluid inertia.

scholarly journals (33) Evaluation of Salad Crop Growth under Environmental Conditions for Space Exploration using Mixed Crop Versus Monoculture Hydroponic Systems

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 1076D-1077 ◽  
Author(s):  
Sharon L. Edney ◽  
Jeffrey T. Richards ◽  
Matthew D. Sisko ◽  
Neil C. Yorio ◽  
Gary W. Stutte ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Crop Production ◽  
Time Course ◽  
Production Efficiency ◽  
Life Support ◽  
Space Station ◽  
Space Vehicle ◽  
Advanced Life Support ◽  
Dry Mass ◽  
Mixed Crop

The development of a crop production system that can be used on the International Space Station, long-duration transit missions, and lunar or Mars habitats, has been a part of NASA's Advanced Life Support (ALS) research efforts. Crops that can be grown under environmental conditions that might be encountered in the open cabin of a space vehicle would be an advantageous choice. The production efficiency of the system would be enhanced by growing these crops in a mixed-crop arrangement. This would also increase the variety of fresh foods available for the crew's dietary supplementation. Three candidate ALS salad crops, radish (Raphanus sativus L. cv. Cherry Bomb II), lettuce (Lactuca sativa L. cv. Flandria), and bunching onion (Allium fistulosum L. cv. Kinka) were grown hydroponically as either monoculture (control) or mixed-crop within a walk-in growth chamber with baseline environments maintained at 22 °C, 50% RH, 17.2 mol·m-2·d-1 light intensity and a 16-h light/8-h dark photoperiod under cool-white fluorescent lamps. Tests were carried out at three different CO2 concentrations: 400, 1200, and 4000 μmol·mol-1. Weekly time-course harvests were taken over 28 days of growth, and fresh mass, dry mass, and harvest index were determined. Results showed that none of the species experienced negative effects when grown together under mixed-crop conditions compared to monoculture growth conditions under the range of environmental conditions tested.

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