Publications by authors named "Yumi Nagashima"
Article Synopsis
- Leaf senescence is triggered by different signals, with dark conditions being a significant factor that activates this process, although the intricate mechanisms involved are still not fully understood.
- Key players in dark-induced senescence include the phytochrome B receptor and transcription factors PIF4 and PIF5, as well as hormonal regulators like ethylene and abscisic acid (ABA).
- The study highlights that PIF4 and PIF5 might influence leaf senescence regulations separately from ethylene signaling and identifies potential involvement of other transcription factors, like NACs, in late-stage gene expression during leaf senescence.
Plastid ribosome biogenesis is important for plant growth and development. REGULATOR OF FATTY ACID COMPOSITION3 (RFC3) is a member of the bacterial ribosomal protein S6 family and is important for lateral root development. dramatically reduces the plastid rRNA level and produces lateral roots that lack stem cells.
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- * Chrysanthemum morifolium faces challenges in genetic analysis and breeding due to its autohexaploid nature and high genome heterogeneity, prompting the development of a more manageable model strain called Gojo-0 from the diploid C. seticuspe.
- * Gojo-0 is advantageous for genetic studies and breeding as it allows for the isolation of mutants and easier genome analysis, enabling further research and genetic improvements in chrysanthemum cultivars.
Article Synopsis
- Chlorophyll degradation is crucial for leaf senescence and involves the breakdown of chlorophyll-binding proteins, but the full regulation of the process is still not completely understood.
- Green cotyledon mutants in legumes are unique because they show impaired chlorophyll degradation during leaf aging and have a maternally inherited soybean gene that affects this process.
- Further research revealed that a specific 5-bp insertion in the gene affects photosystem II, leading to reduced chlorophyll degradation activity in mutant plants, suggesting that this gene uniquely connects photosynthesis and chlorophyll breakdown during leaf senescence and seed maturation.