Phytochromes
نویسنده
چکیده
In addition, we are using the frog system to study size changes that occur during early development by preparing extracts from embryos at different stages. The fertilized egg is 1 mm in diameter in X. laevis, and undergoes rapid cleavages without growth so that the first ~4000 cells of the embryo are generated with minimal transcription or translation. I believe Xenopus will allow us to crack fundamental questions of how organelle size is determined.
منابع مشابه
Nucleo-cytoplasmic partitioning of the plant photoreceptors phytochromes.
Phytochromes in harmony with blue light photoreceptors play a major role in controlling plant growth and development from germination to seed maturation. Light absorption by phytochromes triggers a signaling cascade, phototransduction, which culminates in regulated gene expression. A major regulatory step at the cellular level, which affects specificities of light-induced physiological response...
متن کاملAn Evolutionarily Conserved Signaling Mechanism Mediates Far-Red Light Responses in Land PlantsC
Phytochromes are plant photoreceptors important for development and adaptation to the environment. Phytochrome A (PHYA) is essential for the far-red (FR) high-irradiance responses (HIRs), which are of particular ecological relevance as they enable plants to establish under shade conditions. PHYA and HIRs have been considered unique to seed plants because the divergence of seed plants and crypto...
متن کاملBottom-up Assembly of the Phytochrome Network
Plants have developed sophisticated systems to monitor and rapidly acclimate to environmental fluctuations. Light is an essential source of environmental information throughout the plant's life cycle. The model plant Arabidopsis thaliana possesses five phytochromes (phyA-phyE) with important roles in germination, seedling establishment, shade avoidance, and flowering. However, our understanding...
متن کاملPhytochrome signaling mechanisms.
Phytochromes are red (R)/far-red (FR) light photoreceptors that play fundamental roles in photoperception of the light environment and the subsequent adaptation of plant growth and development. There are five distinct phytochromes in Arabidopsis thaliana, designated phytochrome A (phyA) to phyE. phyA is light-labile and is the primary photoreceptor responsible for mediating photomorphogenic res...
متن کاملAn evolutionarily conserved signaling mechanism mediates far-red light responses in land plants.
Phytochromes are plant photoreceptors important for development and adaptation to the environment. Phytochrome A (PHYA) is essential for the far-red (FR) high-irradiance responses (HIRs), which are of particular ecological relevance as they enable plants to establish under shade conditions. PHYA and HIRs have been considered unique to seed plants because the divergence of seed plants and crypto...
متن کاملMolecular evolution of phytochromes in Cardamine nipponica (Brassicaceae) suggests the involvement of PHYE in local adaptation.
Given that plants are sessile organisms, traits involved in adapting to local environments and/or in monitoring the surrounding environment, such as having photoreceptors, are significant targets of natural selection in plant evolution. To assess the intraspecific adaptive evolution of photoreceptors, we investigated sequence variations in four phytochrome genes (PHYA-C and PHYE) of Cardamine n...
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ورودعنوان ژورنال:
- Current Biology
دوره 20 شماره
صفحات -
تاریخ انتشار 2010