Recent Posts

Two novel repressors of photomorphogenesis act downstream of HY5 in Arabidopsis (Plant Physiol)

Higher plants rely on a sophisticated photo-sensory system to cope with the vast variety of environmental stimuli. Under light conditions, young seedlings display photomorphogenic development to maxize the usage of light. Recently, YQ Heng et al. discovered two B-box containing proteins, BBX30 and BBX31,…

BBX28 Negatively Regulates Photomorphogenesis

Lin et al. show that B-BOX DOMAIN PROTEIN28 plays a role in regulating plant development in response to light signals. Plant Cell https://doi.org/10.1105/tpc.18.00226. By Dongqing Xu and Xing Wang Deng Background: Sunlight is one of the key environmental cues influencing plant growth and development.…

CRY1 interacts with BES1 to regulate BR signaling and photomorphogenesis (Plant Cell)

Plants perceive blue light through cryptochrome (CRY) photoreceptors that are responsible for photomorphogenesis, flowering, and circadian rhythms. At the same time, brassinosteroid (BR) represses photomorphogenesis. In this article, Wang et al. demonstrated CRY1-mediated inhibition of BR signaling as…

Repression of photomorphogenesis by a small cell-wall-derived dark signal ($)

Genetic screens have revealed many key components of light signaling. In this new work, Sinclair et al. provide new insights into the repression of photomorphogenesis by cell-wall derived signals. They started with a mutant, de-etiolated by zinc (dez) that shows open cotyledons and a short hypocotyl…

Review: Multiple routes of light signaling during root photomorphogenesis

Light response research in plants has traditionally focused on the shoot, but recent studies have revealed that roots are also light responsive. Lee et al. address the why and how of root photomorphogenesis. They review three ways that light is perceived in roots: via mobile signals from the shoot, direct…

SPF45-related splicing factor for phytochrome signaling promotes photomorphogenesis by regulating pre-mRNA splicing in Arabidopsis ($)

Light is one of the environmental conditions which regulates plants’ development, but knowledge of how light-induced transcript accumulation occurs via transcriptional versus post-transcriptional mechanisms is limited. Xin et al. report Splicing Factor for Phytochrome Signaling (SFPS) as an interacting…

Metabolic Signaling Regulates Alternative Splicing during Photomorphogenesis

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IN BRIEF by Kathleen L. Farquharson kfarquharson@aspb.org Alternative splicing (AS) regulates gene expression and greatly expands the coding capacity of complex genomes. By regulating which elements of an mRNA transcript are removed or retained, AS produces multiple transcripts from a single gene. Some…