Aethionema arabicum: a novel model plant to study the light control of seed germination

Mérai, Zsuzsanna; Graeber, Kai; Wilhelmsson, Per K.I.; Ullrich, Kristian K.; Arshad, Waheed; Grosche, Christopher; Tarkowská, Danuše; Turečková, Veronika; Strnad, Miroslav; Rensing, Stefan A.; Leubner‐Metzger, Gerhard; Scheid, Ortrun Mittelsten

doi:10.1093/jxb/erz146

Cited by 35 publications

(81 citation statements)

References 91 publications

(121 reference statements)

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“…Thus, proper timing and final proportion of seeds germinating are important for the survival and propagation of plants (Mérai et al, 2018) and may also reflect environmental conditions under which a given species is most likely to succeed (Brändle, Stadler, Klotz, & Brandl, 2003).…”

Section: Introductionmentioning

confidence: 99%

Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species

Zhang

Liu

Huang

et al. 2020

Ecology and Evolution

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Seed germination plays an important role in mediating plant species composition of grassland communities under nitrogen (N) enrichment. Shifts of plant community structure with N‐enhanced deposition in terrestrial ecosystems have occurred globally. Despite numerous studies about the effects of enhanced N deposition on mature plant communities, few studies have focused on seed germination. Using a laboratory experiment, we report the effects of five N concentrations, including 0, 5, 10, 20, and 40 mM N (NH4NO3) on seed germination of eight semi‐arid grassland species. Results showed that low N concentrations (5‐ and 20‐mM N) promoted mean final germination proportion of all eight species by 4.4% and 6.4%, but high concentrations (40 mM N) had no effect. The mean germination rate was decreased 2.1% and 5.1% by higher N concentration (20‐ and 40‐mM N) levels, but germination start time showed the opposite trend, delayed by 0.7, 0.9, and 1.8 d for the 10, 20, and 40 mM N treatments. Final germination proportion, mean germination rate, and germination start time were significantly different among species in response to N concentration treatments. The final germination proportion of Allium tenuissimum and Chenopodium glaucum were suppressed by increased N concentration, whereas it increased for Potentilla bifurca, Plantago asiatica, and Setaria viridis. Our findings provide novel insights into N deposition‐induced species loss based on seed germination factors in semi‐arid grassland communities.

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Section: Introductionmentioning

confidence: 99%

Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species

Zhang

Liu

Huang

et al. 2020

Ecology and Evolution

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“…PHYA and PHYB receptors are essential for promoting seed germination [4,5]. PHYB appears to be solely responsible for LFR in Lycopersicon esculentum, while PHYA inhibits germination under continuous R or FR light [25]. Surprisingly, phytochromes of Lycopersicon esculentum and N. [12].…”

Section: Role Of Phytochromes In Light-and Temperature-dependent Germmentioning

confidence: 99%

“…Phytochromes have an important role in the germination of light-required seed [4,5,[23][24][25]. The signal of light received by phytochromes is converted into internal cues, which then regulates the physiological processes in seeds.…”

Section: Role Of Phytochromes In Light-and Temperature-dependent Germmentioning

confidence: 99%

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Phytochrome B regulates seed germination by integrating light and temperature signals in Nicotiana tabacum L.

Li¹,

Xian-ya²,

Liu³

et al. 2019

Preprint

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Background: Phytochrome is the most abundant photoreceptor in Arabidopsis thaliana ( Arabidopsis ), which integrates light and temperature signals, and in turn regulates plant development. However, the exact pattern of integrated signals during seed germination remains unknown. In this study, we analyzed the effect of NtPHYB1 genotype in response to ecological environments in Nicotiana tabacum L. Results: The germination frequencies of WT seeds showed at least no significant difference, and were significantly higher than that of NtPHYB1 - GFP and NtPHYB1 -RNAi seeds in some environments or. According to the maximum germination frequency , germination of NtPHYB1 - GFP seeds was mainly inhibited by continuous light exposure, while the germination of NtPHYB1- RNAi seeds was repressed by low temperature and no light (darkness) exposure. At 15ºC, the germinations of all three genotypic seeds were inhibited by the low-temperature, and the germination frequency of NtPHYB1 - GFP seeds was significantly lower than that of WT and NtPHYB1 -RNAi seeds; while light signal had no effect at 15ºC. At 20 and 25ºC, the temperature signal promoted germination, and the signal of light was dispensable. At this condition, the maximum germination frequencies were obtained for NtPHYB1 - GFP and WT seeds. At 30 and 35ºC, the light signal was indispensable to maintain seed germination for all three genotypic seeds. At this condition, NtPHYB1 -RNAi seeds reached the maximum germination frequency. Conclusion: Phytochrome B regulates seed germination by integrating light and temperature signals. The above results elucidate why warm spring and autumn (about 25ºC) are more suitable for sowing compared to cool winters (less than 15ºC) and hot summers (greater than 30ºC).

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“…Internal and external conditions must be suitable for seed germination. Germination is controlled by external environmental factors and internal factors such as plant growth regulators (1,2). Gibberellic acid (GA) and abscisic acid (ABA) are well-known plant hormones that have an important role in the regulation of dormancy and germination (3)(4)(5).…”

Section: Introductionmentioning

confidence: 99%

Karrikinolide Promotes Seed Germination but Has no Effect on Leaf Segment Senescence in Triticum aestivum L.

Sağlam¹,

Duygun²,

Kaya³

et al. 2019

Eur J Biol

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Objective: Germination and senescence are the two most important developmental processes in the plant life cycle. While seed germination is an important physiological event for the continuity of species, leaf senescence is also an important developmental process that impacts crop yields. Karrikins are a group of plant growth regulators found in the smoke generated by burning plant material. It has been suggested that karrikinolide (KAR1) is generally the most active karrikin in terms of stimulating germination. Materials and Methods: In this study, the effect of karrikinolide on germination and leaf segment senescence in wheat was investigated. For this purpose, control, 1 nM, 0.01, 0.1, 1, and 10 μM KAR1 solutions were used. Firstly, the wheat seeds were germinated in the dark in these solutions and germination percentages and root lengths were measured. Secondly, 4 of first leaf segments (3cm. each) from 10-day-old wheat seedlings were placed in petri dishes containing 1, 10, 100 μM KAR1 and distilled water as a control. Following incubation, fresh weight, chlorophyll content, cell death amounts and total protein amounts were determined. Results: The obtained data shows that 1 μM KAR1 promotes germination and root length to the greatest extent. This suggests that karrikins have a promoting effect on the germination of wheat seeds. Our results demonstrate that KAR1 has no effect on leaf segment senescence. Conclusion: Our study suggests that KAR1 has the potential to be used in agriculture to improve germination and seedling growth of crop species.

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Aethionema arabicum: a novel model plant to study the light control of seed germination

Cited by 35 publications

References 91 publications

Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species

Direct effects of nitrogen addition on seed germination of eight semi‐arid grassland species

Phytochrome B regulates seed germination by integrating light and temperature signals in Nicotiana tabacum L.

Karrikinolide Promotes Seed Germination but Has no Effect on Leaf Segment Senescence in Triticum aestivum L.

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