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Many roads to success: different combinations of life-history traits provide accurate germination timing in seasonally dry environments ($) (Oiokos)
Plant Science Research WeeklyEnsuring that seeds germinate in the most suitable conditions for seedling establishment is critical for plant fitness, especially in environments where water is not readily available all year. Seed dormancy is considered to be the primary mechanism to achieve this. Still, many other different life-history…
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A prion-like protein regulator of seed germination undergoes hydration-dependent phase separation ($) (Cell)
Plant Science Research WeeklySeed imbibition (i.e., water uptake) marks the beginning of germination, an irreversible process that might lead plants to death if it occurs under unsuitable conditions for seedling development. Therefore, it is expected that seeds only germinate when water is readably available. However, the molecular…
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Effect of nitrogen addition on selection of germination trait in an alpine meadow on the Tibet Plateau (Front. Plant Sci.)
Plant Science Research WeeklyConsidering that atmospheric nitrogen (N) and N deposition have increased due to human activities, understanding the effects of this element in plant communities has become increasingly important. Still, the role of germination traits in these changes at the community level is poorly understood. Here,…
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Review: Ageing beautifully: can the benefits of seed priming be separated from a reduced lifespan trade-off? (J. Exp. Bot.)
Plant Science Research WeeklySeed priming is a family of presowing techniques that control water uptake in seeds, so they are dehydrated once metabolic activities have restarted but before the end of germination. Primed seeds have shown increased and more synchronized germination, especially under stressful conditions, making these…
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Mechanism and function of root circumnutation (PNAS)
Plant Science Research WeeklyThis is an engrossing paper. The authors start off with a simple mutant screen for abnormal root growth in rice seedlings, through which they identified three “long root” mutant alleles of a rice mutant in a gene encoding a histidine kinase, HK1. Careful analysis showed that the mutant roots fail…
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Evolution and ecology of seed internal morphology in relation to germination characteristics in Amaranthaceae ($) (Ann. Bot.)
Plant Science Research WeeklySeed germination, a critical life stage in a plant's life cycle, can be affected by internal seed morphology. In this exciting research, Vandelook and colleagues investigated the evolution of embryo and nutritive tissue characteristics and their relationship with the germination traits of 84 species…
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Seed enhancement technologies to improve germination and emergence of Australian native Poaceae (Seed Sci. Res.)
Plant Science Research Weekly
One of the most significant limitations in seed-based restoration projects is that some native species exhibit low recruitment in the field. As a result, various seed enhancement technologies (SETs) are being developed to improve germination and seedling emergence by facilitating access to nutrients…
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The peroxisome just updated its profile picture (Nature Comms.)
Plant Science Research Weekly
The ability to utilize stored energy is crucial for organism growth and development. For example, seed storage lipids go through hydrolysis and beta-oxidation to provide energy for seed germination. In this process, beta-oxidation occurs in the peroxisome, a subcellular compartment that houses many…
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Combinations of maternal-specific repressive epigenetic marks in the endosperm control seed dormancy (bioRxiv.)
Plant Science Research Weekly
H3K27me3 [K27 (Lysine 27) trimethylation on histone H3] and H3K9me2 are two epigenetic modifications that repress gene activity in plants. While they are typically present in different genomic regions, both marks are found in the seed endosperm. Here, Sato and colleagues show that this histone modification…